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Stability of a slab collisional microtearing mode
Author(s) -
Hamed M.,
Muraglia M.,
Camenen Y.,
Garbet X.
Publication year - 2018
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201700165
Subject(s) - dispersion relation , curvature , mode (computer interface) , slab , physics , stability (learning theory) , linear stability , mechanics , dispersion (optics) , computational physics , classical mechanics , instability , optics , mathematics , geometry , computer science , machine learning , geophysics , operating system
The stability of a collisional microtearing mode (MTM) is investigated by means of linear gyro‐kinetic simulations and a theoretical linear dispersion relation. The electric potential fluctuations and the magnetic curvature are neglected in the simulations to match the theoretical model assumptions. In these conditions, the stability domain, the mode growth rate, and the mode frequency predicted by the theory and the simulations are in satisfactory agreement. The radial structure of the mode has been also investigated, and the localization of the parallel current around the resonant surface predicted by the theory is recovered by the simulations.