Nonlinear behaviour of collisionless double tearing mode induced by electron inertia

Matsumoto, Taro; Naito, Hiroshi*; Tokuda, Shinji; Kishimoto, Yasuaki*

Nuclear Fusion, 45(11), p.1264 - 1270, 2005/11

https://doi.org/10.1088/0029-5515/45/11/006

A gyrokinetic particle simulation is executed to clarify the effect of the electron inertia on the MHD phenomena in the reversed shear configuration (RSC) of a cylindrical tokamak plasma. It is found that the collisionless (kinetic) double tearing modes grow up at the Alfvn time scale, and nonlinearly induce the internal collapse when the helical flux at the magnetic axis is less than that at the outer resonant surface. After the internal collapse, the secondary reconnection is induced by the current concentration due to the convective flow. It is also clarified that a nonlinear dynamics accompanied with the elementary processes caused by the flow can generate a new RSC with resonant surfaces. In the presence of the density gradient, after the full reconnection induced by the mode, the radial electric field is found to be generated due to the difference of the motion between ions and electrons. However, the intensity of the radial field is not so large as that induced by the collisionless kink mode.

Pellet injection experiments on JT-60

Yoshino, Ryuji; Kamada, Yutaka; Shimizu, Katsuhiro; Ozeki, Takahisa; Hirayama, Toshio; Sugie, Tatsuo; Nishitani, Takeo

Kaku Yugo Kenkyu, 65(SPECIAL ISSUE), p.163 - 183, 1991/03

no abstracts in English

Numerical Analyses of Disruptive Instabilities in a Tolamak Plasma

JAERI-M 84-225, 82 Pages, 1984/12

JAERI-M-84-225.pdf:2.16MB

no abstracts in English

MHD Stability Analyses of a Tokamak Plasma by Time-Dependent Codes

JAERI-M 82-093, 56 Pages, 1982/07

JAERI-M-82-093.pdf:2.28MB

no abstracts in English

High Speed Numerical Code 「AEOLUS-RI」 for Resistive MHD Instability with Single Helicity

; ; Tsunematsu, Toshihide; Takeda, Tatsuoki

JAERI-M 8656, 45 Pages, 1980/02

JAERI-M-8656.pdf:1.26MB

no abstracts in English