UNSPECIFIED. (2004) Off-axis electron cyclotron heating and the sandpile paradigm for transport in tokamak plasmas. PHYSICS OF PLASMAS, 11 (2). pp. 659-665. ISSN 1070-664X

Full text not available from this repository.

Abstract

Previous observations that suggest a substantial role for nondiffusive energy transport in tokamaks subjected to off-axis electron cyclotron heating (ECH) are compared to the output from a sandpile model. The observations considered include local and global aspects of temperature profile evolution in the DIII-D [for example, C. C. Petty and T. C. Luce, Nucl. Fusion 34, 121 (1994)] and RTP (Rijnhuizen Tokamak Project) [for example, M. R. de Baar, M. N. A. Beurskens, G. M. D. Hogeweij, and N. J. Lopes Cardozo, Phys. Plasmas 6, 4645 (1999)] tokamaks. The sandpile model employed is an extension, to incorporate noncentral fueling, of one used previously to address tokamak physics issues [S. C. Chapman, R. O. Dendy, and B. Hnat, Phys. Rev. Lett. 86, 2814 (2001)]. It is found that there are significant points of resemblance between the phenomenology of the noncentrally fueled sandpile and of the tokamaks with off-axis ECH. This suggests that the essential ingredient of the sandpile model, namely avalanching conditioned by a local critical gradient, may be one of the key transport effects generated by the tokamak plasma physics. (C) 2004 American Institute of Physics.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICS OF PLASMAS
Publisher:	AMER INST PHYSICS
ISSN:	1070-664X
Date:	February 2004
Volume:	11
Number:	2
Number of Pages:	7
Page Range:	pp. 659-665
Identification Number:	10.1063/1.1639017
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/8862

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item