Firehose and Mirror Instabilities in a Collisionless Shearing Plasma

@article{Kunz2014FirehoseAM,
  title={Firehose and Mirror Instabilities in a Collisionless Shearing Plasma},
  author={Matthew W. Kunz and Alexander A Schekochihin and James M. Stone},
  journal={Physical Review Letters},
  year={2014},
  volume={112},
  pages={205003}
}
Hybrid-kinetic numerical simulations of firehose and mirror instabilities in a collisionless plasma are performed in which pressure anisotropy is driven as the magnetic field is changed by a persistent linear shear $S$. For a decreasing field, it is found that mostly oblique firehose fluctuations grow at ion Larmor scales and saturate with energies $\sim$$S^{1/2}$; the pressure anisotropy is pinned at the stability threshold by particle scattering off microscale fluctuations. In contrast… 

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