Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-06-25
Phys.Rev.E58:4911-4928,1998
Astronomy and Astrophysics
Astrophysics
20 pages, 8 PostScript figures, uses revtex, boxedeps.tex, to appear in Phys. Rev. E
Scientific paper
10.1103/PhysRevE.58.4911
A simplified model of particle transport at a quasiparallel one-dimensional collisionless shock is suggested. In this model the MHD-turbulence behind the shock is dominated by a circularly polarized, large amplitude Alfv\'en wave originated upstream from the turbulence excited by particles leaking from the downstream medium. It is argued that such a wave having significantly increased its magnetic field during the transmission through the shock interface can effectively trap thermal ions, regulating their leakage upstream. Together with a background turbulence this wave also plays a fundamental role in thermalization of the incoming ion flow. The spectrum of leaking particles and the amplitude of the wave excited by these particles are selfconsistently calculated. The injection rate into the first order Fermi acceleration based on this leakage mechanism is obtained and compared with computer simulations. The related problem of shock energy distribution between thermal and nonthermal components of the shocked plasma is discussed. The chemical composition of the leaking particles is studied.
No associations
LandOfFree
Ion leakage from quasiparallel collisionless shocks: implications for injection and shock dissipation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ion leakage from quasiparallel collisionless shocks: implications for injection and shock dissipation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion leakage from quasiparallel collisionless shocks: implications for injection and shock dissipation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-322367