Fast electron energy deposition in a magnetized plasma: Kinetic theory and particle-in-cell simulation

作者：Robiche J^*; Rax J M; Bonnaud G; Gremillet L

来源：Physics of Plasmas, 2010, 17(3): 033106.

DOI：10.1063/1.3356066

The collisional dynamics of a relativistic electron jet in a magnetized plasma are investigated within the framework of kinetic theory. The relativistic Fokker-Planck equation describing slowing down, pitch angle scattering, and cyclotron rotation is derived and solved. Based on the solution of this Fokker-Planck equation, an analytical formula for the root mean square spot size transverse to the magnetic field is derived and this result predicts a reduction in radial transport. Some comparisons with particle-in-cell simulation are made and confirm striking agreement between the theory and the simulation. For fast electron with 1 MeV typical kinetic energy interacting with a solid density hydrogen plasma, the energy deposition density in the transverse direction increases by a factor 2 for magnetic field of the order of 1 T. Along the magnetic field, the energy deposition profile is unaltered compared with the field-free case. c 2010 American Institute of Physics. [doi: 10.1063/1.3356066]

• 出版日期2010-3
• 单位中国地震局