Beam deposition model for energetic electron transport in inertial fusion: Theory and initial results

摘要

A new model is proposed for calculation of the effect of energetic electron transport in inertial fusion. Regions of large temperature gradient are approximated as sources of monoenergetic electron beams which then scatter and deposit their energy in the plasma. For short mean free path, one recovers the classical theory. In regions of high temperature gradient, the model seems to describe nonlocal heat deposition and flux inhibition in qualitatively the same way as much more cumbersome Fokker-Planck simulations. Furthermore, the model contains virtually no free parameters. Finally the effect of this nonlocal deposition and flux inhibition is calculated for laser pellets imploded with Megajoule class lasers. (C) 2004 American Institute of Physics. [References: 26]