Kinetic Theory of Global n=1 Instabilities in Toroidal Plasmas

Kimitaka Itoh, Sanae Inoue Itoh, Takashi Tlda, Shinji Tokloa

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2 Citations (Scopus)


The kinetic theory of the global n=1 instabilities of finite-pressure tokamak plasmas with circular cross-section is investigated in collisionless limit (m, n: poloidal and toroidal mode numbers). Wave-particle interactions and finite gyroradius effect are included. The radial-poloidal eigenmode equations are directly solved numerically. The m=1 internal/tearing mode, n= 1 ballooning mode and m= 2 tearing mode are identified with a fixed boundary condition. The m=1 internal mode turns out to be the collisionless tearing mode in low pressure regimes. The pressure driven ballooning mode is connected with the electrostatic-like ballooning mode. The toroidal coupling further stabilizes the m = 2 tearing mode, which is destabilized by the parallel current and can be stabilized by coupling with drift branch. Analytical studies are made by using the energy integral.

Original languageEnglish
Pages (from-to)1759-1774
Number of pages16
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - 1984
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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