Three-Dimensional SGEMP Calculations Using the Modified Fluid Approach

An approximate method for solving for the volume current density of SGEMP electrons is presented. The approximation follows the motion of the collisionless electron gas using a fluid-like model. The electric and magnetic fields computed with a recently implemented 3-D version of the model are compared with those computed using a conventional 2-D particle-pushing code. The test problem selected is a low fluence, interior emission case. The counterstreaming of the electrons emitted from the front and back walls of the cavity interior provide a stressing test of the fluid-like model.