HYBRID SIMULATIONS OF PROTONS STRONGLY ACCELERATED BY A PARALLEL COLLISIONLESS SHOCK

被引：95

作者：

GIACALONE, J ^{[1
]}

BURGESS, D ^{[1
]}

SCHWARTZ, SJ ^{[1
]}

ELLISON, DC ^{[1
]}

机构：

[1] N CAROLINA STATE UNIV,DEPT PHYS,RALEIGH,NC 27695

来源：

GEOPHYSICAL RESEARCH LETTERS | 1992年 / 19卷 / 05期

关键词：

D O I：

10.1029/92GL00379

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We present initial results from one-dimensional hybrid simulations which directly address the problems of using such methods to simulate the acceleration of ions to high energy by parallel shocks. As particles are accelerated from the thermal population, they are repeatedly "split," thereby ensuring statistically valid energy spectra covering a wide dynamic range. In order to model the complex foreshock, as expected if the simulation domain were large enough, and as seen in observations, we introduce a source of upstream turbulence. This turbulence produces an enhanced high energy tail in the upstream particle distribution extending to over a hundred times the plasma flow energy, and a prominent shoulder downstream.

引用

页码：433 / 436

页数：4

共 12 条

[1]

Armstrong T.P., 1985, GMS, V35, P271, DOI [10.1029/GM035p0271, DOI 10.1029/GM035P0271]

[2] PARTICLE-ACCELERATION AT ASTROPHYSICAL SHOCKS - A THEORY OF COSMIC-RAY ORIGIN [J].