Regular Articles

Full Text / References

MHD Simulations of Pellet Injection in the LHD

Ryuichi ISHIZAKI and Noriyoshi NAKAJIMA

National Institute for Fusion Science, Toki 509-5292, Japan

(Received 11 December 2013 / Accepted 21 April 2014 / Published 29 July 2014)

Abstract

To clarify motions of a plasmoid induced by pellet ablation in the Large Helical Device (LHD), MHD simulations have been conducted. When a plasmoid is located on the inboard side of the mid-plane in the LHD, it drifts in the negative direction of the major radius not only on the horizontally elongated poloidal cross section but also on the vertically elongated poloidal cross section. This means that the plasmoid drifts to the lower field side in the former and to the higher field side in the latter. Our simulations show that these motions are determined by the direction of the curvature vector and the magnetic pressure distribution along the field line at the location of the plasmoid.

Copyright (c) 2014 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

pellet, ablation, MHD, CIP, LHD

DOI: 10.1585/pfr.9.3403130

Full Text

PDF format (737Kbytes)

References

• [1] Y.W. Muller et al., Nucl. Fusion 42, 301 (2002).
• [2] R. Sakamoto et al., Nucl. Fusion 44, 624 (2004).
• [3] R. Ishizaki et al., Phys. Plasmas 11, 4064 (2004).
• [4] R. Ishizaki et al., IAEA-CN-149/TH/P3-6 (2006).
• [5] R. Ishizaki and N. Nakajima, Plasma Phys. Control. Fusion 53, 054009 (2011).
• [6] K. Harafuji et al., J. Comput. Phys. 81, 169 (1989).
• [7] H. Takewaki et al., J. Comput. Phys. 61, 261 (1985).
• [8] J.P. Freidberg, Ideal Magnetohydrodynamics (New York: Plenum, 1987).

This paper may be cited as follows:

Ryuichi ISHIZAKI and Noriyoshi NAKAJIMA, Plasma Fusion Res. 9, 3403130 (2014).