The Hybrid Simulation MPM Model for ECR Ion Source

A new hybrid simulation model named MAGY/PIC/MCC (MPM) has been developed for ECR ion source. We chose the MAGY theoretical model to describe the time-varying electromagnetic fields, the PIC method to deal with the interaction between the charged particles and fields, and the MCC method to simulate the collisions among particles. The generalized telegrapher's equations in MAGY are built by means of expanding perfect waveguide modes. Thus the electromagnetic fields can be considered as a superposition of different modes and frequencies and calculated respectively. We chose the PIC/MCC scheme to deal with the dynamics of particles which can describe both the collective and collision motions. Furthermore, in order to build a self-consistent description of the interactions between the charged particles and the electromagnetic wave, we present the new current source terms associated with MAGY and by far we have completed the verification of their effectiveness. Theoretically, compared with the existing algorithms, the MPM model has better computational accuracy and efficiency, and meanwhile keeps the abundant numerical diagnosis.