Abstract
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 ∼8% of the ELM energy is lost through radiation.
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