http://wiki.fusenet.eu/fusionwiki/index.php?action=history&feed=atom&title=TJ-II%3ATransport_and_magnetic_configuration 2026-04-16T21:46:09Z Revision history for this page on the wiki MediaWiki 1.43.3 http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=4758&oldid=prev 2014-11-25T10:05:36Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:05, 25 November 2014</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l5">Line 5:</td> <td colspan="2" class="diff-lineno">Line 5:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The [[rotational transform]] &lt;ref&gt;E. Ascasíbar et al, &#039;&#039;Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator&#039;&#039;, [[doi:10.1088/0029-5515/45/4/009|Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) 276-284]]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The [[rotational transform]] &lt;ref&gt;E. Ascasíbar et al, &#039;&#039;Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator&#039;&#039;, [[doi:10.1088/0029-5515/45/4/009|Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) 276-284]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', [[doi:10.1209/0295-5075/82/65002|EuroPhysics Letters '''82''' (2008) 65002]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', [[doi:10.1088/0029-5515/49/8/085016|Nucl. Fusion '''49''' (2009) 085016]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''Magnetic Resonances in ECR-Heated Plasmas of the TJ-II Heliac'', [[doi:10.1002/ctpp.200900005|Contrib. Plasma Phys. '''50''' (2010) 600]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''Magnetic resonances and electric fields in the TJ-II Heliac'', [[doi:10.1088/0741-3335/53/12/124022|Plasma Phys. Control. Fusion 53 (2011) 124022]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', [[doi:10.1209/0295-5075/82/65002|EuroPhysics Letters '''82''' (2008) 65002]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', [[doi:10.1088/0029-5515/49/8/085016|Nucl. Fusion '''49''' (2009) 085016]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''Magnetic Resonances in ECR-Heated Plasmas of the TJ-II Heliac'', [[doi:10.1002/ctpp.200900005|Contrib. Plasma Phys. '''50''' (2010) 600]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''Magnetic resonances and electric fields in the TJ-II Heliac'', [[doi:10.1088/0741-3335/53/12/124022|Plasma Phys. Control. Fusion 53 (2011) 124022<ins style="font-weight: bold; text-decoration: none;">]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''Relationship between MHD events, magnetic resonances and transport barriers in TJ-II plasmas'', [[doi:10.1088/0029-5515/53/7/073051|Nucl. Fusion '''53''', 7 (2013) 073051</ins>]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;J.A. Romero et al, &#039;&#039;Controlling confinement with induced toroidal current in the flexible Heliac TJ-II&#039;&#039;, [[doi:10.1088/0029-5515/43/6/301|Nucl. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2003) 387-392]]&lt;/ref&gt; &lt;ref&gt;D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, [[doi:10.1088/0029-5515/44/5/008|Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;J.A. Romero et al, &#039;&#039;Controlling confinement with induced toroidal current in the flexible Heliac TJ-II&#039;&#039;, [[doi:10.1088/0029-5515/43/6/301|Nucl. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2003) 387-392]]&lt;/ref&gt; &lt;ref&gt;D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, [[doi:10.1088/0029-5515/44/5/008|Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, [[doi:10.1088/0741-3335/43/12A/324|Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]]&lt;/ref&gt; &lt;ref&gt;J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, [[doi:10.1063/1.1430435|Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]]&lt;/ref&gt; &lt;ref&gt;E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, [[doi:10.1088/0741-3335/44/12B/322|Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, [[doi:10.1088/0741-3335/43/12A/324|Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]]&lt;/ref&gt; &lt;ref&gt;J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, [[doi:10.1063/1.1430435|Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]]&lt;/ref&gt; &lt;ref&gt;E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, [[doi:10.1088/0741-3335/44/12B/322|Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]]&lt;/ref&gt;</div></td></tr> </table>

Admin http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=4757&oldid=prev 2014-11-25T10:00:31Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:00, 25 November 2014</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A significant part of the research effort at [[TJ-II]] is dedicated to the study of the interaction between transport and the (flexible) magnetic configuration.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A significant part of the research effort at [[TJ-II]] is dedicated to the study of the interaction between transport and the (flexible) magnetic configuration.</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0741-3335/41/12B/307|</del>C. Alejaldre et al, ''Confinement studies in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''41''' (1999) B109]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;C. Alejaldre et al, ''Confinement studies in the TJ-II stellarator'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0741-3335/41/12B/307|</ins>Plasma Phys. Control. Fusion '''41''' (1999) B109]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0741-3335/45/3/304|</del>M.A. Ochando et al, ''Emissivity toroidal asymmetries induced by ECRH driven convective fluxes in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''45''' (2003) 221-231]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;M.A. Ochando et al, ''Emissivity toroidal asymmetries induced by ECRH driven convective fluxes in the TJ-II stellarator'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0741-3335/45/3/304|</ins>Plasma Phys. Control. Fusion '''45''' (2003) 221-231]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[[doi:10.1088/0029-5515/45/10/S22|<del style="font-weight: bold; text-decoration: none;">C. Hidalgo et al, ''Overview of TJ-II experiments'', </del>Nucl. Fusion '''45''' (2005) S266-S275]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;<ins style="font-weight: bold; text-decoration: none;">C. Hidalgo et al, ''Overview of TJ-II experiments'', </ins>[[doi:10.1088/0029-5515/45/10/S22|Nucl. Fusion '''45''' (2005) S266-S275]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* The [[rotational transform]] &lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0029-5515/45/4/009|</del>E. Ascasíbar et al, ''Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator'', Nucl. Fusion '''45''' (2005) 276-284]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* The [[rotational transform]] &lt;ref&gt;E. Ascasíbar et al, ''Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0029-5515/45/4/009|</ins>Nucl. Fusion '''45''' (2005) 276-284]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1209/0295-5075/82/65002|</del>D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', EuroPhysics Letters '''82''' (2008) 65002]]&lt;/ref&gt;&lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0029-5515/49/8/085016|</del>D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', Nucl. Fusion '''49''' (2009) 085016]]&lt;/ref&gt;&lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1002/ctpp.200900005|</del>D. López-Bruna et al, ''Magnetic Resonances in ECR-Heated Plasmas of the TJ-II Heliac'', Contrib. Plasma Phys. '''50''' (2010) 600]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1209/0295-5075/82/65002|</ins>EuroPhysics Letters '''82''' (2008) 65002]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0029-5515/49/8/085016|</ins>Nucl. Fusion '''49''' (2009) 085016]]&lt;/ref&gt;&lt;ref&gt;D. López-Bruna et al, ''Magnetic Resonances in ECR-Heated Plasmas of the TJ-II Heliac'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1002/ctpp.200900005|</ins>Contrib. Plasma Phys. '''50''' (2010) 600]]&lt;/ref&gt;&lt;ref&gt;<ins style="font-weight: bold; text-decoration: none;">D. López-Bruna et al, ''Magnetic resonances and electric fields in the TJ-II Heliac'', </ins>[[doi:10.1088/<ins style="font-weight: bold; text-decoration: none;">0741</ins>-<ins style="font-weight: bold; text-decoration: none;">3335</ins>/<ins style="font-weight: bold; text-decoration: none;">53</ins>/<ins style="font-weight: bold; text-decoration: none;">12</ins>/<ins style="font-weight: bold; text-decoration: none;">124022</ins>|<ins style="font-weight: bold; text-decoration: none;">Plasma Phys. Control. Fusion 53 (2011) 124022]]&lt;/ref&gt;</ins></div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [[Magnetic shear]] </del>&lt;ref&gt;[[doi:10.1088/<del style="font-weight: bold; text-decoration: none;">0029</del>-<del style="font-weight: bold; text-decoration: none;">5515</del>/<del style="font-weight: bold; text-decoration: none;">43</del>/<del style="font-weight: bold; text-decoration: none;">6</del>/<del style="font-weight: bold; text-decoration: none;">301</del>|J.A. Romero et al, ''Controlling confinement with induced toroidal current in the flexible Heliac TJ-II'', Nucl. Fusion '''43''' (2003) 387-392]]&lt;/ref&gt; &lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0029-5515/44/5/008|</del>D. López-Bruna et al, ''Effects of ohmic current in the TJ-II stellarator'', Nucl. Fusion '''44''', 5 (2004) 645-654]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [[Magnetic shear]] &lt;ref&gt;</ins>J.A. Romero et al, ''Controlling confinement with induced toroidal current in the flexible Heliac TJ-II'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0029-5515/43/6/301|</ins>Nucl. Fusion '''43''' (2003) 387-392]]&lt;/ref&gt; &lt;ref&gt;D. López-Bruna et al, ''Effects of ohmic current in the TJ-II stellarator'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0029-5515/44/5/008|</ins>Nucl. Fusion '''44''', 5 (2004) 645-654]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0741-3335/43/12A/324|</del>C. Hidalgo et al, ''On the radial scale of fluctuations in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''43''' (2001) A313-A321]]&lt;/ref&gt; &lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[http://link.aip.org/link/?PHPAEN/9/713/1 </del>J. Castellano et al, ''Magnetic well and instability thresholds in the TJ-II stellarator'', Phys. Plasmas '''9''' (2002) 713]&lt;/ref&gt; &lt;ref&gt;<del style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0741-3335/44/12B/322|</del>E. Ascasíbar et al, ''Confinement and stability on the TJ-II stellarator'', Plasma Phys. Control. Fusion '''44''' (2002) B307-B322]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;C. Hidalgo et al, ''On the radial scale of fluctuations in the TJ-II stellarator'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0741-3335/43/12A/324|</ins>Plasma Phys. Control. Fusion '''43''' (2001) A313-A321]]&lt;/ref&gt; &lt;ref&gt;J. Castellano et al, ''Magnetic well and instability thresholds in the TJ-II stellarator'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1063/1.1430435|</ins>Phys. Plasmas '''9''' (2002) 713<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt; &lt;ref&gt;E. Ascasíbar et al, ''Confinement and stability on the TJ-II stellarator'', <ins style="font-weight: bold; text-decoration: none;">[[doi:10.1088/0741-3335/44/12B/322|</ins>Plasma Phys. Control. Fusion '''44''' (2002) B307-B322]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The picture emerging from these studies is complex. In general, the presence of low-order rational surfaces in the plasma does not seem to be deleterious for transport; rather, local reductions of transport are observed (except at very low shear). Possibly, this is associated with the formation of [[TJ-II:Internal Transport Barriers|internal transport barriers]] at or near such rational surfaces, a consequence of the modification of the radial electric field by the rational surfaces themselves. It is being investigated whether the plasmas where this has been studied have the conditions for a self-healing state of the corresponding magnetic perturbations. On the other hand, the reduction of the magnetic well clearly enhances turbulence levels.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The picture emerging from these studies is complex. In general, the presence of low-order rational surfaces in the plasma does not seem to be deleterious for transport; rather, local reductions of transport are observed (except at very low shear). Possibly, this is associated with the formation of [[TJ-II:Internal Transport Barriers|internal transport barriers]] at or near such rational surfaces, a consequence of the modification of the radial electric field by the rational surfaces themselves. It is being investigated whether the plasmas where this has been studied have the conditions for a self-healing state of the corresponding magnetic perturbations. On the other hand, the reduction of the magnetic well clearly enhances turbulence levels.</div></td></tr> </table>

Admin http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=3558&oldid=prev 2011-09-08T18:50:19Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 20:50, 8 September 2011</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l4">Line 4:</td> <td colspan="2" class="diff-lineno">Line 4:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[[doi:10.1088/0029-5515/45/10/S22|C. Hidalgo et al, &#039;&#039;Overview of TJ-II experiments&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) S266-S275]]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[[doi:10.1088/0029-5515/45/10/S22|C. Hidalgo et al, &#039;&#039;Overview of TJ-II experiments&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) S266-S275]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[[doi:10.1088/0029-5515/45/4/009|E. Ascasíbar et al, ''Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator'', Nucl. Fusion '''45''' (2005) 276-284]]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* The <ins style="font-weight: bold; text-decoration: none;">[[</ins>rotational transform<ins style="font-weight: bold; text-decoration: none;">]] </ins>&lt;ref&gt;[[doi:10.1088/0029-5515/45/4/009|E. Ascasíbar et al, ''Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator'', Nucl. Fusion '''45''' (2005) 276-284]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[[doi:10.1209/0295-5075/82/65002|D. López-Bruna et al, &#039;&#039;Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac&#039;&#039;, EuroPhysics Letters &#039;&#039;&#039;82&#039;&#039;&#039; (2008) 65002]]&lt;/ref&gt;&lt;ref&gt;[[doi:10.1088/0029-5515/49/8/085016|D. López-Bruna et al, &#039;&#039;First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;49&#039;&#039;&#039; (2009) 085016]]&lt;/ref&gt;&lt;ref&gt;[[doi:10.1002/ctpp.200900005|D. López-Bruna et al, &#039;&#039;Magnetic Resonances in ECR-Heated Plasmas of the TJ-II Heliac&#039;&#039;, Contrib. Plasma Phys. &#039;&#039;&#039;50&#039;&#039;&#039; (2010) 600]]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[[doi:10.1209/0295-5075/82/65002|D. López-Bruna et al, &#039;&#039;Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac&#039;&#039;, EuroPhysics Letters &#039;&#039;&#039;82&#039;&#039;&#039; (2008) 65002]]&lt;/ref&gt;&lt;ref&gt;[[doi:10.1088/0029-5515/49/8/085016|D. López-Bruna et al, &#039;&#039;First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;49&#039;&#039;&#039; (2009) 085016]]&lt;/ref&gt;&lt;ref&gt;[[doi:10.1002/ctpp.200900005|D. López-Bruna et al, &#039;&#039;Magnetic Resonances in ECR-Heated Plasmas of the TJ-II Heliac&#039;&#039;, Contrib. Plasma Phys. &#039;&#039;&#039;50&#039;&#039;&#039; (2010) 600]]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[[doi:10.1088/0029-5515/43/6/301|J.A. Romero et al, &#039;&#039;Controlling confinement with induced toroidal current in the flexible Heliac TJ-II&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2003) 387-392]]&lt;/ref&gt; &lt;ref&gt;[[doi:10.1088/0029-5515/44/5/008|D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[[doi:10.1088/0029-5515/43/6/301|J.A. Romero et al, &#039;&#039;Controlling confinement with induced toroidal current in the flexible Heliac TJ-II&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2003) 387-392]]&lt;/ref&gt; &lt;ref&gt;[[doi:10.1088/0029-5515/44/5/008|D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]]&lt;/ref&gt;</div></td></tr> </table>

Admin http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=3557&oldid=prev 2011-09-08T18:48:27Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 20:48, 8 September 2011</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A significant part of the research effort at [[TJ-II]] is dedicated to the study of the interaction between transport and the (flexible) magnetic configuration.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A significant part of the research effort at [[TJ-II]] is dedicated to the study of the interaction between transport and the (flexible) magnetic configuration.</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1088/0741-3335/41/12B/307 C. Alejaldre et al, ''Confinement studies in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''41''' (1999) B109]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1088/0741-3335/41/12B/307<ins style="font-weight: bold; text-decoration: none;">|</ins>C. Alejaldre et al, ''Confinement studies in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''41''' (1999) B109<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1088/0741-3335/45/3/304 M.A. Ochando et al, ''Emissivity toroidal asymmetries induced by ECRH driven convective fluxes in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''45''' (2003) 221-231]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1088/0741-3335/45/3/304<ins style="font-weight: bold; text-decoration: none;">|</ins>M.A. Ochando et al, ''Emissivity toroidal asymmetries induced by ECRH driven convective fluxes in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''45''' (2003) 221-231<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1088/0029-5515/45/10/S22 C. Hidalgo et al, ''Overview of TJ-II experiments'', Nucl. Fusion '''45''' (2005) S266-S275]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1088/0029-5515/45/10/S22<ins style="font-weight: bold; text-decoration: none;">|</ins>C. Hidalgo et al, ''Overview of TJ-II experiments'', Nucl. Fusion '''45''' (2005) S266-S275<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1088/0029-5515/45/4/009 E. Ascasíbar et al, ''Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator'', Nucl. Fusion '''45''' (2005) 276-284]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1088/0029-5515/45/4/009<ins style="font-weight: bold; text-decoration: none;">|</ins>E. Ascasíbar et al, ''Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator'', Nucl. Fusion '''45''' (2005) 276-284<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1209/0295-5075/82/65002 D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', EuroPhysics Letters '''82''' (2008) 65002]&lt;/ref&gt;&lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http://</del>doi:10.1088/0029-5515/49/8/085016 D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', Nucl. Fusion '''49''' (2009) 085016]&lt;/ref&gt;&lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1002/ctpp.200900005 D. López-Bruna et al, ''Magnetic Resonances in ECR-Heated Plasmas of the TJ-II Heliac'', Contrib. Plasma Phys. '''50''' (2010) 600]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1209/0295-5075/82/65002<ins style="font-weight: bold; text-decoration: none;">|</ins>D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', EuroPhysics Letters '''82''' (2008) 65002<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;&lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[</ins>doi:10.1088/0029-5515/49/8/085016<ins style="font-weight: bold; text-decoration: none;">|</ins>D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', Nucl. Fusion '''49''' (2009) 085016<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;&lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1002/ctpp.200900005<ins style="font-weight: bold; text-decoration: none;">|</ins>D. López-Bruna et al, ''Magnetic Resonances in ECR-Heated Plasmas of the TJ-II Heliac'', Contrib. Plasma Phys. '''50''' (2010) 600<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1088/0029-5515/43/6/301 J.A. Romero et al, ''Controlling confinement with induced toroidal current in the flexible Heliac TJ-II'', Nucl. Fusion '''43''' (2003) 387-392]&lt;/ref&gt; &lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1088/0029-5515/44/5/008 D. López-Bruna et al, ''Effects of ohmic current in the TJ-II stellarator'', Nucl. Fusion '''44''', 5 (2004) 645-654]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1088/0029-5515/43/6/301<ins style="font-weight: bold; text-decoration: none;">|</ins>J.A. Romero et al, ''Controlling confinement with induced toroidal current in the flexible Heliac TJ-II'', Nucl. Fusion '''43''' (2003) 387-392<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt; &lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1088/0029-5515/44/5/008<ins style="font-weight: bold; text-decoration: none;">|</ins>D. López-Bruna et al, ''Effects of ohmic current in the TJ-II stellarator'', Nucl. Fusion '''44''', 5 (2004) 645-654<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1088/0741-3335/43/12A/324 C. Hidalgo et al, ''On the radial scale of fluctuations in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''43''' (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, ''Magnetic well and instability thresholds in the TJ-II stellarator'', Phys. Plasmas '''9''' (2002) 713]&lt;/ref&gt; &lt;ref&gt;[<del style="font-weight: bold; text-decoration: none;">http</del>:<del style="font-weight: bold; text-decoration: none;">//dx.doi.org/</del>10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, ''Confinement and stability on the TJ-II stellarator'', Plasma Phys. Control. Fusion '''44''' (2002) B307-B322]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1088/0741-3335/43/12A/324<ins style="font-weight: bold; text-decoration: none;">|</ins>C. Hidalgo et al, ''On the radial scale of fluctuations in the TJ-II stellarator'', Plasma Phys. Control. Fusion '''43''' (2001) A313-A321<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, ''Magnetic well and instability thresholds in the TJ-II stellarator'', Phys. Plasmas '''9''' (2002) 713]&lt;/ref&gt; &lt;ref&gt;[<ins style="font-weight: bold; text-decoration: none;">[doi</ins>:10.1088/0741-3335/44/12B/322<ins style="font-weight: bold; text-decoration: none;">|</ins>E. Ascasíbar et al, ''Confinement and stability on the TJ-II stellarator'', Plasma Phys. Control. Fusion '''44''' (2002) B307-B322<ins style="font-weight: bold; text-decoration: none;">]</ins>]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The picture emerging from these studies is complex. In general, the presence of low-order rational surfaces in the plasma does not seem to be deleterious for transport; rather, local reductions of transport are observed (except at very low shear). Possibly, this is associated with the formation of [[TJ-II:Internal Transport Barriers|internal transport barriers]] at or near such rational surfaces, a consequence of the modification of the radial electric field by the rational surfaces themselves. It is being investigated whether the plasmas where this has been studied have the conditions for a self-healing state of the corresponding magnetic perturbations. On the other hand, the reduction of the magnetic well clearly enhances turbulence levels.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The picture emerging from these studies is complex. In general, the presence of low-order rational surfaces in the plasma does not seem to be deleterious for transport; rather, local reductions of transport are observed (except at very low shear). Possibly, this is associated with the formation of [[TJ-II:Internal Transport Barriers|internal transport barriers]] at or near such rational surfaces, a consequence of the modification of the radial electric field by the rational surfaces themselves. It is being investigated whether the plasmas where this has been studied have the conditions for a self-healing state of the corresponding magnetic perturbations. On the other hand, the reduction of the magnetic well clearly enhances turbulence levels.</div></td></tr> </table>

Admin http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=3556&oldid=prev 2011-09-08T18:19:57Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 20:19, 8 September 2011</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l5">Line 5:</td> <td colspan="2" class="diff-lineno">Line 5:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/4/009 E. Ascasíbar et al, &#039;&#039;Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) 276-284]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/4/009 E. Ascasíbar et al, &#039;&#039;Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) 276-284]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', EuroPhysics Letters '''82''' (2008) 65002]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', EuroPhysics Letters '''82''' (2008) 65002]&lt;/ref&gt;&lt;ref&gt;[http://doi:10.1088/0029-5515/49/8/085016 D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', Nucl. Fusion '''49''' (2009) 085016]&lt;/ref&gt;&lt;ref&gt;[http://dx.doi.org/10.<ins style="font-weight: bold; text-decoration: none;">1002</ins>/<ins style="font-weight: bold; text-decoration: none;">ctpp.200900005 </ins>D. López-Bruna et al, ''<ins style="font-weight: bold; text-decoration: none;">Magnetic Resonances </ins>in <ins style="font-weight: bold; text-decoration: none;">ECR-Heated Plasmas </ins>of the TJ-II Heliac'', <ins style="font-weight: bold; text-decoration: none;">Contrib. Plasma Phys. </ins>'''<ins style="font-weight: bold; text-decoration: none;">50</ins>''' (<ins style="font-weight: bold; text-decoration: none;">2010</ins>) <ins style="font-weight: bold; text-decoration: none;">600</ins>]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[http://doi:10.1088/0029-5515/49/8/085016 D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', Nucl. Fusion '''49''' (2009) 085016]&lt;/ref&gt;</div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[http://dx.doi.org/10.<del style="font-weight: bold; text-decoration: none;">1209</del>/<del style="font-weight: bold; text-decoration: none;">0295-5075/82/65002 </del>D. López-Bruna et al, ''<del style="font-weight: bold; text-decoration: none;">Tracking magnetic resonances </del>in <del style="font-weight: bold; text-decoration: none;">the effective electron heat diffusivity of ECH plasmas </del>of the TJ-II Heliac'', <del style="font-weight: bold; text-decoration: none;">EuroPhysics Letters </del>'''<del style="font-weight: bold; text-decoration: none;">82</del>''' (<del style="font-weight: bold; text-decoration: none;">2008</del>) <del style="font-weight: bold; text-decoration: none;">65002</del>]&lt;/ref&gt;</div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/43/6/301 J.A. Romero et al, &#039;&#039;Controlling confinement with induced toroidal current in the flexible Heliac TJ-II&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2003) 387-392]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/44/5/008 D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/43/6/301 J.A. Romero et al, &#039;&#039;Controlling confinement with induced toroidal current in the flexible Heliac TJ-II&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2003) 387-392]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/44/5/008 D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td></tr> </table>

Daniellopezbruna http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=3555&oldid=prev 2011-09-08T18:14:47Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 20:14, 8 September 2011</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l6">Line 6:</td> <td colspan="2" class="diff-lineno">Line 6:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/4/009 E. Ascasíbar et al, &#039;&#039;Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) 276-284]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/4/009 E. Ascasíbar et al, &#039;&#039;Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) 276-284]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, &#039;&#039;Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac&#039;&#039;, EuroPhysics Letters &#039;&#039;&#039;82&#039;&#039;&#039; (2008) 65002]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, &#039;&#039;Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac&#039;&#039;, EuroPhysics Letters &#039;&#039;&#039;82&#039;&#039;&#039; (2008) 65002]&lt;/ref&gt;</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">&lt;ref&gt;[http://doi:10.1088/0029-5515/49/8/085016 D. López-Bruna et al, ''First dynamic magnetic configuration scans in ECRH plasmas of the TJ-II Heliac'', Nucl. Fusion '''49''' (2009) 085016]&lt;/ref&gt;</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">&lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, ''Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac'', EuroPhysics Letters '''82''' (2008) 65002]&lt;/ref&gt;</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/43/6/301 J.A. Romero et al, &#039;&#039;Controlling confinement with induced toroidal current in the flexible Heliac TJ-II&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2003) 387-392]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/44/5/008 D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/43/6/301 J.A. Romero et al, &#039;&#039;Controlling confinement with induced toroidal current in the flexible Heliac TJ-II&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2003) 387-392]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/44/5/008 D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td></tr> </table>

Daniellopezbruna http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=2369&oldid=prev 2010-07-28T19:08:21Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 21:08, 28 July 2010</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l9">Line 9:</td> <td colspan="2" class="diff-lineno">Line 9:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The picture emerging from these studies is complex. In general, the presence of low-order rational surfaces in the plasma does not seem to be deleterious for transport; rather, local reductions of transport are observed (except at very low shear). Possibly, this is associated with the formation of [[TJ-II:Internal Transport Barriers|internal transport barriers]] at or near such rational surfaces. On the other hand, the reduction of the magnetic well clearly enhances turbulence levels.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The picture emerging from these studies is complex. In general, the presence of low-order rational surfaces in the plasma does not seem to be deleterious for transport; rather, local reductions of transport are observed (except at very low shear). Possibly, this is associated with the formation of [[TJ-II:Internal Transport Barriers|internal transport barriers]] at or near such rational surfaces<ins style="font-weight: bold; text-decoration: none;">, a consequence of the modification of the radial electric field by the rational surfaces themselves. It is being investigated whether the plasmas where this has been studied have the conditions for a self-healing state of the corresponding magnetic perturbations</ins>. On the other hand, the reduction of the magnetic well clearly enhances turbulence levels.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;references /&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;references /&gt;</div></td></tr> </table>

130.206.11.82 http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=982&oldid=prev 2009-08-24T07:59:26Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 09:59, 24 August 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l6">Line 6:</td> <td colspan="2" class="diff-lineno">Line 6:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/4/009 E. Ascasíbar et al, &#039;&#039;Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) 276-284]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* The rotational transform &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/4/009 E. Ascasíbar et al, &#039;&#039;Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) 276-284]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, &#039;&#039;Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac&#039;&#039;, EuroPhysics Letters &#039;&#039;&#039;82&#039;&#039;&#039; (2008) 65002]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, &#039;&#039;Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac&#039;&#039;, EuroPhysics Letters &#039;&#039;&#039;82&#039;&#039;&#039; (2008) 65002]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/44/5/008 D. López-Bruna et al, ''Effects of ohmic current in the TJ-II stellarator'', Nucl. Fusion '''44''', 5 (2004) 645-654]&lt;/ref&gt;</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] <ins style="font-weight: bold; text-decoration: none;">&lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/43/6/301 J.A. Romero et al, ''Controlling confinement with induced toroidal current in the flexible Heliac TJ-II'', Nucl. Fusion '''43''' (2003) 387-392]&lt;/ref&gt; </ins>&lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/44/5/008 D. López-Bruna et al, ''Effects of ohmic current in the TJ-II stellarator'', Nucl. Fusion '''44''', 5 (2004) 645-654]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> </table>

Admin http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=981&oldid=prev 2009-08-24T06:22:03Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 08:22, 24 August 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3">Line 3:</td> <td colspan="2" class="diff-lineno">Line 3:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/45/3/304 M.A. Ochando et al, &#039;&#039;Emissivity toroidal asymmetries induced by ECRH driven convective fluxes in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2003) 221-231]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/45/3/304 M.A. Ochando et al, &#039;&#039;Emissivity toroidal asymmetries induced by ECRH driven convective fluxes in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2003) 221-231]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/10/S22 C. Hidalgo et al, &#039;&#039;Overview of TJ-II experiments&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) S266-S275]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/10/S22 C. Hidalgo et al, &#039;&#039;Overview of TJ-II experiments&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;45&#039;&#039;&#039; (2005) S266-S275]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">&lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/4/009 E. Ascasíbar et al, ''Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator'', Nucl. Fusion '''45''' (2005) 276-284]&lt;/ref&gt;</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The following issues contribute to the influence of the configuration on confinement:</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* The rotational transform &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/45/4/009 E. Ascasíbar et al, ''Magnetic configuration and plasma parameter dependence of the energy confinement time in ECR heated plasmas from the TJ-II stellarator'', Nucl. Fusion '''45''' (2005) 276-284]&lt;/ref&gt;</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, &#039;&#039;Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac&#039;&#039;, EuroPhysics Letters &#039;&#039;&#039;82&#039;&#039;&#039; (2008) 65002]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Rational surfaces &lt;ref&gt;[http://dx.doi.org/10.1209/0295-5075/82/65002 D. López-Bruna et al, &#039;&#039;Tracking magnetic resonances in the effective electron heat diffusivity of ECH plasmas of the TJ-II Heliac&#039;&#039;, EuroPhysics Letters &#039;&#039;&#039;82&#039;&#039;&#039; (2008) 65002]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/44/5/008 D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic shear]] &lt;ref&gt;[http://dx.doi.org/10.1088/0029-5515/44/5/008 D. López-Bruna et al, &#039;&#039;Effects of ohmic current in the TJ-II stellarator&#039;&#039;, Nucl. Fusion &#039;&#039;&#039;44&#039;&#039;&#039;, 5 (2004) 645-654]&lt;/ref&gt;</div></td></tr> </table>

Admin http://wiki.fusenet.eu/fusionwiki/index.php?title=TJ-II:Transport_and_magnetic_configuration&diff=980&oldid=prev 2009-08-23T19:05:15Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 21:05, 23 August 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l9">Line 9:</td> <td colspan="2" class="diff-lineno">Line 9:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Magnetic well]] &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/43/12A/324 C. Hidalgo et al, &#039;&#039;On the radial scale of fluctuations in the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;43&#039;&#039;&#039; (2001) A313-A321]&lt;/ref&gt; &lt;ref&gt;[http://link.aip.org/link/?PHPAEN/9/713/1 J. Castellano et al, &#039;&#039;Magnetic well and instability thresholds in the TJ-II stellarator&#039;&#039;, Phys. Plasmas &#039;&#039;&#039;9&#039;&#039;&#039; (2002) 713]&lt;/ref&gt; &lt;ref&gt;[http://dx.doi.org/10.1088/0741-3335/44/12B/322 E. Ascasíbar et al, &#039;&#039;Confinement and stability on the TJ-II stellarator&#039;&#039;, Plasma Phys. Control. Fusion &#039;&#039;&#039;44&#039;&#039;&#039; (2002) B307-B322]&lt;/ref&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">The picture emerging from these studies is complex. In general, the presence of low-order rational surfaces in the plasma does not seem to be deleterious for transport; rather, local reductions of transport are observed (except at very low shear). Possibly, this is associated with the formation of [[TJ-II:Internal Transport Barriers|internal transport barriers]] at or near such rational surfaces. On the other hand, the reduction of the magnetic well clearly enhances turbulence levels.</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== References ==</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;references /&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;references /&gt;</div></td></tr> </table>

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