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

Journal Article · Thu May 01 04:00:00 EDT 1997 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872310· OSTI ID:544567

Fujisawa, A; Iguchi, H; Lee, S; Crowley, T P; Hamada, Y; Kubo, S; Idei, H; Sanuki, H; Itoh, K; Minami, T; Tanaka, K; Nishimura, S; Ida, K; Hidekuma, S; Kojima, M; Takahashi, C; Okamura, S; Matsuoka, K ^[1]

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1. National Institute for Fusion Science, Furo-cho, Chikusa-ku, Nagoya, 464-01 (Japan)

In this paper we present space potential profiles directly observed in a toroidal helical plasma of the Compact Helical System (CHS) [K. Matsuoka {ital et al.}, {ital 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. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 544567
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 4; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM INJECTION HEATING
CHS TORSATRON
ECR HEATING
HEAVY IONS
ION PROBES
KEV RANGE 100-1000
PLASMA DIAGNOSTICS
PLASMA POTENTIAL
SPATIAL DISTRIBUTION
STELLARATORS