Onset condition of thermoelectric instability in divertor tokamaks

N. Hayashi, T. Takizuka, A. Hatayama, M. Ogasawara

研究成果: Article査読

10 被引用数 (Scopus)

抄録

The onset condition of a thermoelectric instability in divertor tokamaks has been studied analytically and numerically by using a five point model based on SOL and divertor plasmas. The SOL current due to the thermoelectric effect causes the thermoelectric instability and destabilizes the symmetric equilibrium of the SOL and divertor plasmas below a critical divertor plasma temperature. The critical temperature of the thermoelectric instability is equal to or higher than that of the thermal instability due to the divertor radiation, and depends on the midplane SOL plasma temperature and the divertor radiation loss. Below the critical temperature, stable asymmetric equilibria are obtained. As the degree of the asymmetry in the divertor plasma temperature increases, the SOL current has no effect on the instability, or even stabilizes the equilibrium. The SOL current generates spontaneously the divertor asymmetry through the thermoelectric instability.

本文言語English
ページ(範囲)1695-1709
ページ数15
ジャーナルNuclear Fusion
38
11
DOI
出版ステータスPublished - 1998 12 1

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 凝縮系物理学

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