Initial Measurements from an Ultrashort-Pulse Reflectometer on GAMMA 10

Initial results from an ultrashort-pulse reflectometer on the GAMMA 10 tandem mirror are presented. The diagnostic uses an impulse generator (8 V, 65 ps full-width at half maximum) as its microwave source, and the four-channel receiver system measures the time-of-flight for ordinary-mode polarized r...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1999, Vol.38 (2B), p.L202
Main Authors: Kubota, Shigeyuki, Onuma, Tsuyoshi, Katoh, Masayuki, Mase, Atsushi, Tokuzawa, Tokihiko, Oyama, Naoyuki, Itakura, Akiyosi, Hojo, Hitoshi, Bruskin, Leonid G., Tamano, Teruo, Yatsu, Kiyoshi, Domier, Calvin W., Jr, andNeville C. Luhmann
Format: Article
Language:English
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Summary:Initial results from an ultrashort-pulse reflectometer on the GAMMA 10 tandem mirror are presented. The diagnostic uses an impulse generator (8 V, 65 ps full-width at half maximum) as its microwave source, and the four-channel receiver system measures the time-of-flight for ordinary-mode polarized reflected waves at 8, 9, 10 and 11 GHz. The reflectometer tracks electron density fluctuations well over portions of the discharge, while overall values of the time-of-flight are in rough agreement with calculated values using Abel-inverted profiles from interferometry data. These results demonstrate the potential of the current system for time-resolved electron density profile measurements on GAMMA 10.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.38.L202