PIC simulations of the micropulsed electron gun (MPG)

Summary form only given. We have developed a surface physics package which has been introduced into the 2-1/2D particle-in-cell code OOPIC in order to model the MPG, a novel electron gun based on electron multipacting. The simulations are in cylindrical geometry, and can include electromagnetic effects such as cavity loading. The object-oriented nature of OOPIC was particularly suitable for the code development and computational modeling of the device. Scaling of current density vs. frequency, and other characteristic parameters of the gun, will be presented. Comparisons of the numerical results with a 2-1/2D Cartesian code FMTSEC, and with experimental data showing the device performance, will be presented.