Journal article
Gyrokinetic simulations of the tearing instability
Physics of plasmas, Vol.18(11), 112106
11/22/2011
DOI: 10.1063/1.3659035
Abstract
Linear gyrokinetic simulations covering the collisional-collisionless transitional regime of the tearing instability are performed. It is shown that the growth rate scaling with collisionality agrees well with that predicted by a two-fluid theory for a low plasma beta case in which ion kinetic dynamics are negligible. Electron wave-particle interactions (Landau damping), finite Larmor radius, and other kinetic effects invalidate the fluid theory in the collisionless regime, in which a general non-polytropic equation of state for pressure (temperature) perturbations should be considered. We also vary the ratio of the background ion to electron temperatures and show that the scalings expected from existing calculations can be recovered, but only in the limit of very low beta.
Details
- Title: Subtitle
- Gyrokinetic simulations of the tearing instability
- Creators
- Ryusuke Numata - University of HyogoWilliam Dorland - University of Maryland, College ParkGregory Howes - University of IowaNuno F Loureiro - University of LisbonBarrett Rogers - University of HyogoTomoya Tatsuno - University of Maryland, College Park
- Resource Type
- Journal article
- Publication Details
- Physics of plasmas, Vol.18(11), 112106
- DOI
- 10.1063/1.3659035
- ISSN
- 1070-664X
- eISSN
- 1089-7674
- Publisher
- American Institute of Physics
- Date published
- 11/22/2011
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199790802771
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