TJ-II:Biasing probe: Difference between revisions
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At [[TJ-II]], a 2-D carbon composite mushroom shaped electrode (12 mm high with a diameter of 25 mm) has been developed and installed on a fast reciprocating probe drive. Typically, the electrode is inserted to a position 2 cm inside the last closed flux surface (LCFS) and biased positively (200-300 V) with respect to one of the two [[TJ-II:Limiter|TJ-II limiters]] located in the scrape-off layer region (about 0.5 cm beyond the LCFS). Measured electrode currents are in the range of 30-50 A. | |||
<ref>[http://dx.doi.org/10.1007/s10582-006-0044-3 C. Silva et al, ''Transport and fluctuations during electrode biasing on TJ-II'', Czech. J. Phys. '''55''' (2005) 1589]</ref> | <ref>[http://dx.doi.org/10.1007/s10582-006-0044-3 C. Silva et al, ''Transport and fluctuations during electrode biasing on TJ-II'', Czech. J. Phys. '''55''' (2005) 1589]</ref> | ||
<ref>[http://www-pub.iaea.org/MTCD/Meetings/FEC2006/ex_p4-40.pdf M.A. Pedrosa et al, ''Transport and fluctuations during electrode biasing experiments on the TJ-II stellarator'', Proc. 12<sup>st</sup> Fusion Energy Conf. (2006) EX-P4/40]</ref> | <ref>[http://www-pub.iaea.org/MTCD/Meetings/FEC2006/ex_p4-40.pdf M.A. Pedrosa et al, ''Transport and fluctuations during electrode biasing experiments on the TJ-II stellarator'', Proc. 12<sup>st</sup> Fusion Energy Conf. (2006) EX-P4/40]</ref> | ||
Revision as of 15:40, 13 August 2009
At TJ-II, a 2-D carbon composite mushroom shaped electrode (12 mm high with a diameter of 25 mm) has been developed and installed on a fast reciprocating probe drive. Typically, the electrode is inserted to a position 2 cm inside the last closed flux surface (LCFS) and biased positively (200-300 V) with respect to one of the two TJ-II limiters located in the scrape-off layer region (about 0.5 cm beyond the LCFS). Measured electrode currents are in the range of 30-50 A. [1] [2]