Divertor target profiles and recycling studies in TCV single null lower standard discharges

A 'standard', single null lower diverted discharge has been developed to enable continuous monitoring of the first wall conditions and to characterise the effectiveness and influence of wall conditioning in the TCV tokamak. Measurements over a period encompassing nearly 2000 ohmic discharges of varying configuration and input power show the global confinement time and main plasma impurity concentrations to be good general indicators of the first wall condition, whilst divertor target profiles demonstrate strikingly the short term beneficial effects of He glow. Good agreement, consistent with a reduction in recycling at the plates is found between the predictions of the fluid code UEDGE and the observed outer divertor profiles of T-e and n(e) before and after He glow.


Published in:
Journal of Nuclear Materials, 241, 867-872
Year:
1997
ISSN:
0022-3115
ISBN:
0022-3115
Laboratories:
SPC
CRPP




 Record created 2008-04-16, last modified 2018-01-28


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