[Table of Contents]

Plasma and Fusion Research

Volume 1, 005 (2006)

Rapid Communications

Energetic Ion Measurements Using a Directional Probe
Kenichi NAGAOKA, Mitsutaka ISOBE, Kouji SHINOHARA1), Masaki OSAKABE, Akihiro SHIMIZU and Shoichi OKAMURA
National Institute for Fusion Science
Japan Atomic Energy Agency
(Received 5 December 2005 / Accepted 21 December 2005 / Published 31 January 2006)


A directional Langmuir probe (DLP) method has been applied to measurement of energetic particles (ions) in a magnetically confined plasma. Two experimental demonstrations were performed in the compact helical system (CHS). One was a neutral beam modulation experiment and the other was the measurement of energetic ion loss induced by MHD bursts. The results of the DLP were consistent with those of a neutral particle analyzer (NPA) and a lost ion probe (LIP). These experiments show that this method is applicable outside and also inside the last closed flux surface.


energetic particle transport, directional probe method, energetic particle mode

DOI: 10.1585/pfr.1.005


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This paper may be cited as follows:

Kenichi NAGAOKA, Mitsutaka ISOBE, Kouji SHINOHARA, Masaki OSAKABE, Akihiro SHIMIZU and Shoichi OKAMURA, Plasma Fusion Res. 1, 005 (2006).