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Observation of Striation in Collapsing Plasma

Ryuichi SAKAMOTO, Suguru MASUZAKI, Junichi MIYAZAWA and LHD Experimental Group

National Institute for Fusion Science

(Received 7 February 2006 / Accepted 23 February 2006 / Published 7 April 2006)

Abstract

A high-luminosity striation, which rotates within a flux surface of the plasma boundary having helical structure, has been observed in the LHD plasmas by means of a fast camera. The striation appears when the plasma is shrinking due to excessive gas fueling despite the existence of neutral beam heating.

Copyright (c) 2006 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

LHD, striation, radiation collapse, fast camera

DOI: 10.1585/pfr.1.019

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References

• [1] R. Sakamoto et al., Rev. Sci. Instrum. 76, 103502(2005).
• [2] S. Masuzaki et al., J. Plasma Fusion Res. 81, 649 (2005).
• [3] A. Weller et al., Phys. Rev. Lett. 59, 2303 (1987).
• [4] K. Ida et al., Nucl. Fusion 45, 391 (2005).

This paper may be cited as follows:

Ryuichi SAKAMOTO, Suguru MASUZAKI, Junichi MIYAZAWA and LHD Experimental Group, Plasma Fusion Res. 1, 019 (2006).