[Table of Contents]

Plasma and Fusion Research

Volume 2, S1102 (2007)

Regular Articles

Beam Probe Imaging of Electron Density in the Chaotic Region of CHS
Harukazu IGUCHI, Kiichiro NAKAMURA, Josef SCHWEINZER1) and CHS Group
National Institute for Fusion Science, Toki 509-5292 Japan
1)
Max-Planck-Institut fur Plasmaphysik, D-4086 Garching bei Munchen, Germany
(Received 4 December 2006 / Accepted 26 April 2007 / Published 20 November 2007)

Abstract

A neutral lithium beam probe (LiBP) for the Compact Helical System (CHS) has been extended to a two-dimensional imaging diagnostic (2-D-LiBP). Two-dimensional image of the plasma structure in the edge and separatrix region of the l = 2 helical device is obtained by changing the beam injection angle mechanically, shot-to-shot. The 2-D image has shown the asymmetric plasma structure in the edge separatrix region, suggesting that 2-D diagnostic is essential in the chaotic magnetic field region where magnetic surfaces are not defined by a flux function.

Keywords

lithium beam, imaging diagnostic, beam probe imaging, edge plasma modeling

DOI: 10.1585/pfr.2.S1102

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This paper may be cited as follows:

Harukazu IGUCHI, Kiichiro NAKAMURA, Josef SCHWEINZER and CHS Group, Plasma Fusion Res. 2, S1102 (2007).