TJ-II: Difference between revisions

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 TJ-II is a flexible Heliac installed at Spain's [[Laboratorio Nacional de Fusión|National Fusion Laboratory]].
-It is one of Spain's [http://www.micinn.es/portal/site/MICINN/menuitem.6f2062042f6a5bc43b3f6810d14041a0/?vgnextoid=cb09846085f90210VgnVCM1000001034e20aRCRD Large Scientific Installations].
+It is one of Spain's [https://www.ciencia.gob.es/Organismos-y-Centros/Infraestructuras-Cientificas-y-Tecnicas-Singulares-ICTS.html Unique Scientific and Technical Infrastructures].
 It is currently operational.
@@ Line 10: / Line 10: @@
 The flexible Heliac TJ-II was designed on the basis of calculations performed by the team of physicists and engineers of [[CIEMAT]], in collaboration with the Oak Ridge National Laboratory ([http://en.wikipedia.org/wiki/ORNL ORNL], USA) and the Institut für PlasmaPhysik at Garching ([http://en.wikipedia.org/wiki/Max-Planck-Institut_f%C3%BCr_Plasmaphysik IPP], Germany).
-<ref>[http://www.ornl.gov/info/reports/1987/3445602635147.pdf T.C. Hender et al, ''Studies of a flexible heliac configuration'', Report ORNL/TM-10374 (1987) OSTI ID: 6007697]</ref>
+<ref>T.C. Hender et al, ''Studies of a flexible heliac configuration'', [https://www.osti.gov/biblio/6007697-studies-flexible-heliac-configuration Report ORNL/TM-10374 (1987) OSTI ID: 6007697]</ref>
-The TJ-II project received preferential support from [[Euratom]] for phase I (Physics) in 1986 and for phase II (Engineering) in 1990. The [[TJ-II:Construction|construction of this flexible Heliac]] was carried out in parts according to its constitutive elements, which were commissioned to various European companies, although 60% of the investments reverted back to Spanish companies.
+The TJ-II project received preferential support from [[Euratom]] for phase I (Physics) in 1986<ref>Application for EURATOM preferential support (Phase I) - TJ-II EXPERIMENT, [http://www-fusion.ciemat.es/InternalReport/fusion_1985.pdf Technical report, Asociación EURATOM/CIEMAT, 1985]</ref> and for phase II (Engineering) in 1990<ref>Application for EURATOM preferential support (Phase II) - TJ-II EXPERIMENT, [http://www-fusion.ciemat.es/InternalReport/fusion_1989b.pdf Technical report, Asociación EURATOM/CIEMAT, 1989]</ref>. The [[TJ-II:Construction|construction of this flexible Heliac]] was carried out in parts according to its constitutive elements, which were commissioned to various European companies, although 60% of the investments reverted back to Spanish companies.
-The first plasma was produced in 1999.
+The first plasma was produced in 1997.<ref>[http://www.ciemat.es/vertices/vertices-292017/Vertices29/pdf/VERTICES29.pdf Special issue of CIEMAT's magazine ''Vertices''] commemorating 20 years of experiments (December, 2017)</ref>
 == Precedents ==
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 TJ-II discharges last around 0.25 s, with a repetition frequency of about 7 minutes.
+{| class="wikitable"  align="center" border="1"
+!''Parameter''                           !!''Value''!!''Unit''
+|-
+|Major radius, ''R<sub>0</sub>'':          ||  1.5  || m
+|-
+|Minor radius, ''a'':          ||  < 0.22  || m
+|-
+|Plasma volume, ''V'':          ||  1  || m<sup>3</sup>
+|-
+|Field periods:          ||  4  ||
+|-
+|[[TJ-II:Coil system|TF coils]]:          ||  32  ||
+|-
+|Number of ports:          ||  104  ||
+|-
+|Rotational transform, ''&iota;/2&pi;'':          ||  0.9 - 2.5  ||
+|-
+|Magnetic field on axis, ''B<sub>0</sub>'':          ||  ~1  || T
+|-
+|ECRH heating power, ''P<sub>ECRH</sub>'':          ||  < 600  || kW
+|-
+|NBI heating power, ''P<sub>NBI</sub>'':          ||  < 2  || MW
+|-
+|Pulse length:          ||  < 200  || ms
+|}
 == Goals and Research ==
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 The objective of the experimental program of TJ-II is to investigate the physics of a device with a helical magnetic axis having a great flexibility in its magnetic configuration, and to contribute to the international effort regarding the study of magnetic confinement devices for fusion.
-Also refer to [[Plasma Physics at the LNF]].
+Also refer to [[LNF:Plasma Physics]].
 == Operation ==
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 * A [[TJ-II:Vacuum system|vacuum system]] controls the pressure inside the vacuum vessel.
 * The electric energy required for a TJ-II discharge is obtained from a [[TJ-II:Power supply|flywheel generator]].
-* The [[TJ-II:Coil system|coils]] are cooled by means of a [[TJ-II:cooling system|cooling system]].
+* The [[TJ-II:Coil system|coils]] are cooled by means of a [[TJ-II:Cooling system|cooling system]].
 * An extensive set of systems is available to perform [[TJ-II:Plasma Wall Interaction|plasma wall conditioning]].
 * Two movable [[TJ-II:Limiter|limiters]] can be used to limit the plasma.
@@ Line 76: / Line 102: @@
 * [[TJ-II:Compact Neutral Particle Analyzer|Compact Neutral Particle Analyzer]]
 * [[TJ-II:Fast ion loss probe|Fast ion loss probe]]
+* [[TJ-II:Retarding Field Analyzer|Retarding Field Analyzer]]
 * [[TJ-II:Fast camera|Fast camera]]
@@ Line 87: / Line 114: @@
 * [[TJ-II:Helium Beam|Helium Beam]]
 * [[TJ-II:Lithium Beam|Lithium Beam]]
+[http://www-fusion.ciemat.es/cgi-bin/TJII_data.cgi Interactive on-line data visualization]
 == Numerical resources ==
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 * [[CUTIE]] - Full-tokamak fluid turbulence
 * [[MOCA]] - Monte Carlo [[Neoclassical transport]] code
+* [[DKES]] - [[Neoclassical transport]] code
 * [[TRECE]] - Microwave ray tracing
 * [[TRUBA]]- Microwave beam/ray tracing including electron Bernstein wave calculations.