2. 粒子シミュレーションの基礎 : プラズマ計算機シミュレーション入門 I

概要

論文の詳細を見る
In a particle simulation, it is inevitable that there is a more limited number of particles than in a real plasma. Therefore, charged particles in particle simulation have an enhanced mass and charge with a fixed charge-to-mass ratio. These particles are called superparticles. In a plasma consisting of superparticles, collisional effects increase drastically from the real plasma. The use of finite-size particles in which superparticles have a distributed charge density profile, reduces the collisional effects to an acceptable level. The nondimensional equations for the particle simulation are derived from the equations of motion and the Maxwell equations. The method of charge(and current)assignment from the particle to the grid points is explained as well as the interpolation scheme of field quantities from the grid points to the particle position. The time integration scheme of the equations of motion is illustrated. Some recent topics related to particle simulations are presented.
1998-05-25