A beam-RF simulation technique based on evolutionary amplification equations

Summary form only given. Present TWTA beam-RP simulation techniques fall into roughly two categories, particle-in-cell (PIC) and "envelope." The PIC methods tend toward "full-physics/ geometry" and usually require considerable computational resources. The "envelope" methods are usually parametric physics/geometry and assume a priori knowledge of the solution, e.g. harmonic time and/or space dependence, in conjunction with an amplitude/phase function which depends solely on z or t. The gulf between these two approaches can sometimes be considerable and unacceptable. This paper will present a computational methodology which bridges the simulation cost/accuracy gap.