Electron phase-space hole transverse instability at high magnetic field
Name
1906.04065.pdf
Description
Submitted version
Size
1.04 MB
Format
Adobe PDF
Checksum (MD5)
350689d3d7de6f856f77e0926c7988f7
Author(s)
Hutchinson, Ian H.
Date Issued
September 2019
Journal
Journal of Plasma Physics
Publisher
Cambridge University Press (CUP)
Citation
Hutchinson, I.H., "Electron phase-space hole transverse instability at high magnetic field." Journal of Plasma Physics 85, 5 (2019): no. 905850501 doi: 10.1017/S0022377819000564 ©2019
Version
Original manuscript
Abstract
Analytic treatment is presented of the electrostatic instability of an initially planar electron hole in a plasma of effectively infinite particle magnetization. It is shown that there is an unstable mode consisting of a rigid shift of the hole in the trapping direction. Its low frequency is determined by the real part of the force balance between the Maxwell stress arising from the transverse wavenumber and the kinematic jetting from the hole's acceleration. The very low growth rate arises from a delicate balance in the imaginary part of the force between the passing-particle jetting, which is destabilizing, and the resonant response of the trapped particles, which is stabilizing. Nearly universal scalings of the complex frequency and with hole depth are derived. Particle in cell simulations show that the slow-growing instabilities previously investigated as coupled hole-wave phenomena occur at the predicted frequency, but with growth rates 2 to 4 times greater than the analytic prediction. This higher rate may be caused by a reduced resonant stabilization because of numerical phase-space diffusion in the simulations. ©2019 Keywords: plasma instabilities; plasma nonlinear phenomena; space plasma physics
MIT Department
Massachusetts Institute of Technology. Department of Mathematics
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1017/S0022377819000564
