TITLE

Fast ion measurement using a hybrid directional probe in the large helical device

AUTHOR(S)
Nagaoka, Kenichi; Watanabe, Kiyomasa Y.; Osakabe, Masaki; Takeiri, Yasuhiko; Minami, Takashi; Toi, Kazuo; Isobe, Mitsutaka; Nishiura, Masaki; Ito, Takafumi; Ogawa, Kunihiro
PUB. DATE
October 2008
SOURCE
Review of Scientific Instruments;Oct2008, Vol. 79 Issue 10, p10E523
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A hybrid directional probe was newly installed in the large helical device for fast ion measurement. The collector of the probe mounts a thermocouple to estimate local power flux and can be also utilized as a collector of a conventional Langmuir probe; therefore, the hybrid directional probe can simultaneously measure both local power density flux and current flux at the same collector surface. The concept and design of the hybrid directional probe, the calibration of the power density measurement, and preliminary result of the fast ion measurement are presented.
ACCESSION #
35150226

 

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