TAE mode stability in JT-60SU steady state plasmas

T. Ozeki, Chio-Zong Cheng, K. Nagashima

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3 引文 斯高帕斯(Scopus)

摘要

The stability of toroidal Alfven eigenmodes (TAEs) is presented for steady state plasmas in the JT-60 Super Upgrade (JT-60SU). Studies are carried out by using the ACCOME code for calculating self-consistent MHD equilibria and by using the NOVA-K code for analysing the TAE stability. Characteristics of the TAE stability are obtained for non-inductive steady state plasmas (3 MA/3 T) with a large bootstrap current and a 500 keV neutral beam (NB) current. Above the density value corresponding to VhVA∼1, the TAE becomes unstable owing to the large pressure gradient, ΔPh, and the large β of the hot particles, (βh). Here, V hVA is the ratio of the hot particle velocity to the Alfven velocity. As the density and the temperature increase, the bootstrap current increases so that the NB power required for the current drive decreases. Consequently, both ΔPh and (βh) decrease and the TAEs are stabilized by ion Landau damping. In the high current and high toroidal field plasma (10 MA/6.25 T) case, because ΔPh is small, owing to high density, and (βh) is small, owing to high toroidal field, the TAE is stable for low n to medium n (15).

原文English
文章編號I16
頁(從 - 到)1553-1562
頁數10
期刊Nuclear Fusion
35
發行號12
DOIs
出版狀態Published - 1995 十二月 1

All Science Journal Classification (ASJC) codes

  • 核能與高能物理
  • 凝聚態物理學

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