Fast radiation dynamics during ELMs on TCV

Total radiative powers measured by AXUV diode based bolometer cameras have been measured in lower single null, third harmonic electron cyclotron resonance (X3 ECR) heated TCV ELMing H-mode discharges. Although, the non-flat spectral response of the diodes means that total radiated powers can be in error by as much as a factor 2, with time resolution on the order of several microseconds, the cameras can resolve plasma radiation dynamics on the ELM timescale. Observations show that: (i) most of the radiation comes from the divertor and outer midplane regions, (ii) about 70% of the ELM induced radiation occurs in the first third of the ELM cycle and (iii) only a Maximum of similar to 8% of the ELM energy is lost through radiation. (C) 2009 Published by Elsevier B.V.


Published in:
Journal Of Nuclear Materials, 390-391, 835-838
Presented at:
18th International Conference on Plasma-Surface Interactions, PSI, Toledo, Spain, May 26-30, 2008
Year:
2009
Publisher:
Elsevier
Keywords:
Laboratories:
SPC
CRPP




 Record created 2009-03-25, last modified 2018-04-07


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