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Kinetic Simulations of the interruption of large-amplitude Shear-Alfvén waves in a high-β plasma

Abstract:

Using two-dimensional hybrid-kinetic simulations, we explore the nonlinear "interruption" of standing and traveling shear-Alfvén waves in collisionless plasmas. Interruption involves a self-generated pressure anisotropy removing the restoring force of a linearly polarized Alfvénic perturbation, and occurs for wave amplitudes $δB_{⊥}/B_{0}≳β^{-1/2}$ (where $β$ is the ratio of thermal to magnetic pressure). We use highly elongated domains to obtain maximal scale separation between the wave and ...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1103/physrevlett.119.155101

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics; Theoretical Physics
Oxford college:
Merton College
Role:
Author
Simons Foundation More from this funder
Science and Technology Facilities Council More from this funder
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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review Letters Journal website
Volume:
119
Issue:
15
Pages:
155101
Publication date:
2017-10-12
Acceptance date:
2017-09-14
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Pubs id:
pubs:738379
URN:
uri:b2d6e55d-0ddf-4ab8-abe4-0d5a7aad362d
UUID:
uuid:b2d6e55d-0ddf-4ab8-abe4-0d5a7aad362d
Local pid:
pubs:738379
Paper number:
15
Language:
English
Keywords:

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