Study of collisionless TE and ITG modes in an ITER-like equilibrium
Paper in proceedings, 2008

The linear stability of collisionless trapped electron (TE) and ion temperature gradient (ITG) modes is studied in an ITER-like magnetic field configuration. An advanced fluid model for ITG-TE mode [1] is used and an eigenvalue equation along a field line is derived using the ballooning mode formalism. The eigenvalue problem is solved numerically using a standard shooting technique and applying WKB type boundary conditions. The growth rates and real frequencies of the most unstable modes and their eigenfunctions are calculated. Effects of the magnetic shear, trapped electrons fraction, wavevector, temperature ratios, and temperature gradients on mode stability are discussed.

tokamaks

Microinstabilities

Author

Ansar Mahmood

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Biomedical Electromagnetics

Jan Weiland

Chalmers, Department of Radio and Space Science, Transport Theory

Mikael Persson

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Biomedical Electromagnetics

Tariq Rafiq

Lehigh University

Proceedings of the 35th EPS Conference on Plasma Physics, Hersonissos, Greece, 9-13 June, 2008, ECA

Vol. 32F 2 4.024-

Subject Categories

Fusion, Plasma and Space Physics

ISBN

978-162276335-1

More information

Created

10/7/2017