Measurement of Line Emission Profiles of Fast Helium Beams and their Application to Plasma Diagnostics

Visible HeI beam emission profiles have been measured at JET using 70 and 130kV pure and doped He beams in a radially swept high clearance L-mode plasma. The measured spectra are very clean with good spatial coverage. Altogether, the profiles of 7 different lines could be measured in plasmas with 1.5 Zeff 2.1. These profiles will be used to develop a reversion code extracting density- and temperature profiles from the He beam emission profiles.
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EFDC010292 1.22 Mb