Collisionless Shocks and Nonthermal Particle Acceleration : An Introduction to Plasma Astrophysics

1989 ◽  
Vol 92 (852) ◽  
pp. 993-997
Author(s):  
Toshio TERASAWA
Keyword(s):  
Particle Acceleration ◽  
Plasma Astrophysics ◽  
Collisionless Shocks

scholarly journals Collisionless shocks and particle acceleration: Lessons from studies of heliospheric shocks

2010 ◽  
Vol 6 (S274) ◽  
pp. 214-219
Author(s):  
Toshio Terasawa
Keyword(s):  
Particle Acceleration ◽  
Electron Acceleration ◽  
Shock Acceleration ◽  
Acceleration Process ◽  
Collisionless Shocks ◽  
Neutral Particles ◽  
Nonlinear Reaction

AbstractAcceleration processes at astrophysical collisionless shocks are reviewed with a special emphasis on the importance of in situ observations of heliospheric shocks. Topics to be included are nonlinear reaction of shock acceleration process, effect of neutral particles, and electron acceleration.

scholarly journals Three criteria for particle acceleration in collisionless shocks

2018 ◽  
Vol 36 (4) ◽  
pp. 458-464 ◽  
Author(s):  
Antoine Bret ◽  
Asaf Pe'er
Keyword(s):  
Particle Acceleration ◽  
Phase Space ◽  
Shock Front ◽  
Initial Density ◽  
Collisionless Shocks ◽  
Pair Plasma ◽  
The Subject ◽  
Do So

AbstractCollisionless shocks have been the subject on many studies in recent years, due to their ability to accelerate particles. In order to do so, a shock must fulfill three criteria. First, it must be strong enough to accelerate particles efficiently. Second, both the upstream and the downstream must be collisionless. Third, the shock front must be surrounded by electromagnetic turbulence capable of scattering particles back and forth. We here consider the encounter of two identical plasma shells with initial density, temperature, and velocity n0, T0, v0, respectively. We translate the three criteria to the corresponding requirements on these parameters. A non-trivial map of the allowed region for particle acceleration emerges in the (n0, T0, v0) phase space, especially at low velocities or high densities. We first assess the case of pair plasma shells, before we turn to electrons/protons.

scholarly journals Particle Acceleration and Plasma Heating at Collisionless Shocks in Solar Flares

1989 ◽  
Vol 104 (2) ◽  
pp. 325-328
Author(s):  
Peter J. Cargill ◽  
Loukas Vlahos
Keyword(s):  
Particle Acceleration ◽  
Energy Release ◽  
Solar Flares ◽  
Plasma Heating ◽  
Collisionless Shocks

AbstractRecent observations suggest that the energy release in solar flares may occur in many small bursts. If these bursts give rise to plasma heating, a large number of collisionless shocks will be generated. These shocks can individually heat plasma and accelerate particles, but the interaction of particles with many shocks as well, as of shocks with each other can give rise to further heating and acceleration.

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