Simulation of energetic particle interactions with a shock wave in a focused transport model Conference Paper uri icon

abstract

  • Solar energetic particles events are typically divided into two classes-impulsive events with characteristic times for the observed fluxes of several hours, and gradual events, with fluxes lasting for several days [1]. Besides such characteristics, as enrichment by electrons, 3He, and charge states of heavy ions like iron, these classes are usually assessed to have different acceleration mechanisms. Particles in impulsive events are considered to be energized in solar flares by either stochastic acceleration and/or in a process involving magnetic reconnection. In gradual events particles are thought to be accelerated mainly at traveling interplanetary shock waves by the process of diffusive shock acceleration (DSA)[2] which requires a pitch angle distribution function of accelerated particles which is always close to isotropy. However, spacecraft observations in the past decades have shown that …

publication date

  • January 1, 2015