Numerical Analysis of Relaxation Process with Fast Particle Generation in Malmberg-Penning Trap Experiment for Ion Beam Inertial Fusion.

• A rapid relaxation phenomenon in Malmberg-Penning trap experiment was reproduced by a numerical simulation in particle-particle method (PPM), which calculates interactions of each particle with a softening parameter. • The multi-particle simulation showed the fast particle generation as the rapid relaxation process. • The regeneration rate of the fast particle given by the numerical result corresponded to the rate observed by the experimental results. • In comparisons with the experimental and the numerical results, it was considered that the rapid relaxation process was caused by the Coulomb interaction between the electrons. To clarify a regeneration process of fast electrons in a Malmberg-Penning trap device, a numerical simulation was carried out using a multi-particle tracking code. The numerical simulations reproduced the fast particle regeneration by the rapid relaxation process observed in the experiment. In comparison with the experimental and the numerical results, it was considered that the rapid relaxation process was caused by the Coulomb interaction between the electrons. [ABSTRACT FROM AUTHOR]