Direct observation of potential profiles with a 200 keV heavy ion beam probe on the Compact Helical System

A. Fujisawa, H. Iguchi, S. Lee, T. P. Crowley, Y. Hamada, S. Kubo, H. Idei, H. Sanuki, K. Itoh, T. Minami, K. Tanaka, S. Nishimura, K. Ida, S. Hidekuma, M. Kojima, C. Takahashi, S. Okamura, K. Matsuoka

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Abstract

In this paper we present space potential profiles directly observed in a toroidal helical plasma of the Compact Helical System (CHS) [K. Matsuoka et al., Proceedings, 12th International Conference on Plasma Physics and Controlled Nuclear Fusion, Nice, 1988 (International Atomic Energy Agency, Vienna, 1989), Vol. 2, p. 411], using a 200 keV heavy ion beam probe. The potential profiles exhibit widely varied characteristics, including positive and negative polarities for electron cyclotron and neutral beam-heated plasmas, respectively. The behavior of high-energy particles in the CHS plasmas are deduced from loss cone diagrams evaluated from the observed potential profiles.

Original languageEnglish
Pages (from-to)1357-1361
Number of pages5
JournalPhysics of Plasmas
Volume4
Issue number5
DOIs
Publication statusPublished - May 1997

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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