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TJ-II:Limiter: Difference between revisions
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[[TJ-II]] has two mobile limiters, located in [[TJ-II:Sectors|sectors]] A3 and C3 (115.5º and 295.5º), with a toroidal separation of 180º. | [[TJ-II]] has two mobile limiters, located in [[TJ-II:Sectors|sectors]] A3 and C3 (115.5º and 295.5º), with a toroidal separation of 180º. | ||
<ref> | <ref>E. de la Cal et al, ''The diagnosed mobile limiters of the TJ-II stellarator for plasma boundary studies'', [[doi:10.1016/S0022-3115(98)00829-0|J. Nucl. Mat. '''266-269''' (1999) 485]]</ref> | ||
The limiters are fitted with Langmuir probes and gas injection ports. | The limiters are fitted with Langmuir probes and gas injection ports. | ||
<ref> | <ref>E. de la Cal, B. Brañas, F.L. Tabarés, D. Tafalla, A.L. Fraguas, M.A. Pedrosa, V. Tribaldos, E. Ascasibar, J. Herranz, I. Pastor and TJ-II Team, ''Plasma boundary and SOL studies of ECH-plasmas in TJ-II stellarator with diagnosed mobile poloidal limiters'', [[doi:10.1016/S0022-3115(00)00525-0|Journal of Nuclear Materials, '''290-293''' (2001) 579-583]]</ref> | ||
<ref> | <ref>I. García-Cortés et al, ''Fuelling efficiency of hydrocarbons in TJ-II plasmas'', [[doi:10.1016/j.jnucmat.2004.07.055|J. Nucl. Mat. '''337-339''' (2005) 441-445]]</ref> | ||
<ref> | <ref>E. de la Cal et al, ''Hydrogen recycling and puffing at a poloidal limiter of TJ-II'', [[doi:10.1016/j.jnucmat.2007.01.061|J. Nucl. Mat. '''363-365''' (2007) 764-769]]</ref> | ||
A biasing voltage can be applied. | A biasing voltage can be applied. | ||
<ref> | <ref>C. Hidalgo et al, ''Improved confinement regimes induced by limiter biasing in the TJ-II stellarator'', [[doi:10.1088/0741-3335/46/1/018|Plasma Phys. Control. Fusion '''46''' (2004) 287-297]]</ref> | ||
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[[File:TJII_LLL.jpg|300px|thumb|right|Liquid Lithium Limiter with Capillary Porous System]] | [[File:TJII_LLL.jpg|300px|thumb|right|Liquid Lithium Limiter with Capillary Porous System]] | ||
On May 2012 the LLL was installed in sector A. | On May 2012 the LLL was installed in sector A. | ||
<ref> | <ref>A.V. Vertkov, I.E. Lyublinski, F. Tabares, E. Ascasibar, ''Development of Liquid Lithium Limiter for Stellarator TJ-II'', [http://www-pub.iaea.org/mtcd/meetings/PDFplus/2010/cn180/cn180_papers/ftp_p1-34.pdf 23<sup>rd</sup> IAEA Fusion Energy Conference, Daejon, Korea (2010) FTP/P1-34]</ref> | ||
<ref> | <ref>I.E. Lyublinski, A.V. Vertkov, et al., ''Development and experimental study of Lithium based plasma facing elements for fusion reactor application'', [http://www-pub.iaea.org/mtcd/meetings/PDFplus/2010/cn180/cn180_papers/ftp_3-6rb.pdf 23<sup>rd</sup> IAEA Fusion Energy Conference, Daejon, Korea (2010) FTP/3-6Rb]</ref> | ||
<ref>[[doi:10.1016/j.fusengdes.2011.10.004| | <ref>A.V. Vertkov, I.E. Liublinski, F.L. Tabarés et al., ''Status and prospect of the development of liquid lithium limiters for stellarotor TJ-II'', [[doi:10.1016/j.fusengdes.2011.10.004|Fus. Eng. and Design '''87''' (2012) 1755 - 1759]]</ref> | ||
Experiments on D retention were performed at temperatures up to 400°C.<ref>F.L. Tabarés et al. ''Studies of Plasma-Lithium Interactions in TJ-II''. IAEA 2012 | Experiments on D retention were performed at temperatures up to 400°C.<ref>F.L. Tabarés et al. ''Studies of Plasma-Lithium Interactions in TJ-II'', [http://www-naweb.iaea.org/napc/physics/FEC/FEC2012/papers/632_EXP536.pdf IAEA 2012, EX/P5-36]</ref> | ||
Also, biasing of the LLL respect to the plasma and respect to he C limiter in C3 were carried out.<ref>E. Oyarzabal et al. Proc 17<sup>th</sup> ISHW Padova, Sept 2013.</ref> | Also, biasing of the LLL respect to the plasma and respect to he C limiter in C3 were carried out.<ref>E. Oyarzabal et al. Proc 17<sup>th</sup> ISHW Padova, Sept 2013.</ref> | ||
Insertion of the LLL up to 3 cm into the edge was possible without any apparent damage. | Insertion of the LLL up to 3 cm into the edge was possible without any apparent damage. | ||