Extended operational regimes and MHD behavior in a low-aspect-ratio reversed field pinch in RELAX

Ryuya Ikezoe, K. Oki, Takumi Onchi, Y. Konishi, M. Sugihara, S. Fujita, A. Sanpei, H. Himura, S. Masamune

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Operational regimes have been investigated over a wide range of discharge parameters in a low-aspect-ratio (low-A) reversed field pinch (RFP) RELAX. Two distinctive regimes have been identified, possibly characteristic to low-A RFP. One is a very shallow-reversal regime, and the other is an extremely deep-reversal regime where a field-reversal parameter lower than-1 could be sustained. Innewly attained extremely deep-reversal plasmas, the amplitudes of the resonant modes were suppressed to a lower level with enhanced soft-x-ray emission intensity. The extremely deep-reversal regime in low-A RFP may have a potential to become a new operational regime with improved plasma performance.

Original languageEnglish
Article number025003
JournalPlasma Physics and Controlled Fusion
Volume53
Issue number2
DOIs
Publication statusPublished - Feb 1 2011
Externally publishedYes

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low aspect ratio
Magnetohydrodynamics
Aspect ratio
Plasmas
X rays
x rays

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Extended operational regimes and MHD behavior in a low-aspect-ratio reversed field pinch in RELAX. / Ikezoe, Ryuya; Oki, K.; Onchi, Takumi; Konishi, Y.; Sugihara, M.; Fujita, S.; Sanpei, A.; Himura, H.; Masamune, S.

In: Plasma Physics and Controlled Fusion, Vol. 53, No. 2, 025003, 01.02.2011.

Research output: Contribution to journalArticle

Ikezoe, Ryuya ; Oki, K. ; Onchi, Takumi ; Konishi, Y. ; Sugihara, M. ; Fujita, S. ; Sanpei, A. ; Himura, H. ; Masamune, S. / Extended operational regimes and MHD behavior in a low-aspect-ratio reversed field pinch in RELAX. In: Plasma Physics and Controlled Fusion. 2011 ; Vol. 53, No. 2.
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