EPOCH

EPOCHis a plasma physics simulation code which uses the Particle in Cell (PIC) method. In thismethod, collections of physical particles are represented using a smaller number of pseudoparticles, and the elds generated by the motion of these pseudoparticles are calculated using a nite dierence timedomain technique on an underlying grid of xed spatial resolution. The forces on the pseudoparticles due to the calculated elds are then used to update the pseudoparticle velocities, and these velocities are then used to update the pseudoparticle positions. This leads to a scheme which can reproduce the full range of classical micro-scale behaviour of a collection of charged particles.