Numerical simulation of high-current vacuum arc in external magnetic field with ion sticking probability depending on the incident angle

The paper is devoted to the further developing of a numerical model for the simulation of high current vacuum arcs (HCVA) with cathode attachment in the form of multiple cathode spots. The model allows one to simulate: the supersonic/subsonic transition in HCVA, near-cathode mixing zone, and HCVA with multiply separate columns. This is the continuation of previous work of the authors about of the HCVA hybrid model [6]. The model is substantially modified. Ionization, recombination, and charge exchange of atom and ions are taken in considerations with the help of Monte Carlo methods. The modification allows to take in account the dependence of ion sticking coefficient on the incident angle and to follow the further evolution of the resulting atom.