Effects of Hall current and electron temperature anisotropy on proton fire-hose instabilities

2013 ◽  
Vol 20 (10) ◽  
pp. 102120 ◽  
Author(s):  
L.-N. Hau ◽  
B.-J. Wang
Keyword(s):  
Electron Temperature ◽  
Hall Current ◽  
Temperature Anisotropy ◽  
Fire Hose

Electromagnetic electron temperature anisotropy instabilities

1985 ◽  
Vol 90 (A8) ◽  
pp. 7607-7610 ◽  
Author(s):  
S. Peter Gary ◽  
Christian D. Madland
Keyword(s):  
Electron Temperature ◽  
Temperature Anisotropy

The Effect of Electron Temperature Anisotropy on the Field-Aligned Propagation of Whistler Waves

1981 ◽  
Vol 50 (6) ◽  
pp. 1821-1822
Author(s):  
Tomikazu Namikawa ◽  
Hiromitsu Hamabata ◽  
Kazuhiko Tanabe
Keyword(s):  
Electron Temperature ◽  
Temperature Anisotropy ◽  
Whistler Waves

A temperature-anisotropy instability for electromagnetic waves propagating across a static magnetic field

1970 ◽  
Vol 4 (1) ◽  
pp. 13-20 ◽  
Author(s):  
R. W. Landau ◽  
S. Cuperman
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Electromagnetic Waves ◽  
Maximal Rate ◽  
Temperature Anisotropy ◽  
Thermal Anisotropy ◽  
Rate Of Growth ◽  
Interplanetary Plasma ◽  
Set Up ◽  
Fire Hose

The instability of electromagnetic waves propagating across a static magnetic field in the presence of a thermal anisotropy (T∥ > T⊥) is investigated. The marginal stabifity criterion as well as the rate of growth of the instability are derived. When compared with the fire hose instability (of electromagnetic waves propagating along the static magnetic field) it is found that higher electron pressures are required for this new instability to be set up; however, the maximal rate of growth is much larger than in the fire hose case.The interplanetary plasma is stable to this thermal anisotropy instability; high β plasma devices may be unstable.The T⊥ = 0 case treated by Hamasaki is recovered.

scholarly journals Bursty emission of whistler waves in association with plasmoid collision

2017 ◽  
Vol 35 (4) ◽  
pp. 885-892 ◽  
Author(s):  
Keizo Fujimoto
Keyword(s):  
Magnetic Field ◽  
Electron Temperature ◽  
Magnetic Reconnection ◽  
High Energy ◽  
Temperature Anisotropy ◽  
Whistler Waves ◽  
High Energy Electrons ◽  
Parallel Direction ◽  
Short Time ◽  
Particle Energization

Abstract. A new mechanism to generate whistler waves in the course of collisionless magnetic reconnection is proposed. It is found that intense whistler emissions occur in association with plasmoid collisions. The key processes are strong perpendicular heating of the electrons through a secondary magnetic reconnection during plasmoid collision and the subsequent compression of the ambient magnetic field, leading to whistler instability due to the electron temperature anisotropy. The emissions have a bursty nature, completing in a short time within the ion timescales, as has often been observed in the Earth's magnetosphere. The whistler waves can accelerate the electrons in the parallel direction, contributing to the generation of high-energy electrons. The present study suggests that the bursty emission of whistler waves could be an indicator of plasmoid collisions and the associated particle energization during collisionless magnetic reconnection.

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