ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Temporal and spatial profiles of the x-ray spectra in the range 3–400 keV have been measured for divertor plasmas on the JFT-2M tokamak with a recently developed pulse-height analyzer system. This detection system incorporates an array of six vertically placed sets of a high-purity germanium spectrometer. Each x-ray energy spectrum can be measured simultaneously with a sampling interval of 1–255 ms. Dynamic change of the electron temperature profile, such as time behavior with H-mode transition, can be measured with this system. It was observed that the electron temperature profile became broad just after the H-mode transition during neutral-beam heated discharge. In the lower-hybrid current drive experiments, the x-ray emission profile depended strongly on the density. The x-ray intensity from the peripheral region became strong with increase in electron density.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1140069
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