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Amplitude limits and nonlinear damping of shear-Alfvén waves in high-beta low-collisionality plasmas

Abstract:

This work, which extends Squire et al (Astrophys. J. Lett. 2016 830 L25), explores the effect of self-generated pressure anisotropy on linearly polarized shear-Alfvén fluctuations in low-collisionality plasmas. Such anisotropies lead to stringent limits on the amplitude of magnetic perturbations in high-β plasmas, above which a fluctuation can destabilize itself through the parallel firehose instability. This causes the wave frequency to approach zero, 'interrupting' the wave and stopping it...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1088/1367-2630/aa6bb1

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Oxford college:
Merton College
Role:
Author
Gordon and Betty Moore Foundation More from this funder
Simons Foundation More from this funder
National Science Foundation More from this funder
Publisher:
Institute of Physics Publisher's website
Journal:
New Journal of Physics Journal website
Volume:
19
Issue:
5
Pages:
055005
Publication date:
2017-05-01
Acceptance date:
2017-04-06
DOI:
EISSN:
1367-2630
ISSN:
1367-2630
Source identifiers:
701642
Keywords:
Pubs id:
pubs:701642
UUID:
uuid:14b8d5b0-7262-47e3-a1bb-c3a953632895
Local pid:
pubs:701642
Deposit date:
2017-10-23

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