TY - JOUR

T1 - Kinetic Theory of Global n=1 Instabilities in Toroidal Plasmas

AU - Itoh, Kimitaka

AU - Itoh, Sanae Inoue

AU - Tlda, Takashi

AU - Tokloa, Shinji

PY - 1984/1/1

Y1 - 1984/1/1

N2 - 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.

AB - 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.

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U2 - 10.1143/JPSJ.53.1759

DO - 10.1143/JPSJ.53.1759

M3 - Article

AN - SCOPUS:0021429762

VL - 53

SP - 1759

EP - 1774

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 5

ER -