Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Abstract
We solve the linearized gyrokinetic equation, quasineutrality condition and Ampere's law to obtain the dispersion relation of microtearing modes (MTMs) in collisionless low- $\beta$ toroidal plasmas. Consistent with past studies, we find that MTMs are driven unstable by the electron temperature gradient and that this instability drive is mediated by magnetic drifts. The dispersion relation that we derive can be evaluated numerically very quickly and may prove useful for devising strategies to mitigate MTM instability in fusion devices.
Department
Physics
Publication Date
3-21-2024
Journal Title
Journal of Plasma Physics
Publisher
Cambridge University Press (CUP)
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Chandran BDG, Schekochihin AA. The gyrokinetic dispersion relation of microtearing modes in collisionless toroidal plasmas. Journal of Plasma Physics. 2024;90(2):905900204. doi:10.1017/S0022377824000175
Comments
This is an open access article published by Cambridge University Press (CUP) in Journal of Plasma Physics in 2024, available online: https://dx.doi.org/10.1017/S0022377824000175