P2-35: Effects of MICHELLE thermal beam modeling on Ka-Band devices

The effect of thermal velocities on beam formation and PPM focused beam transport, including cathode edge emission, are studied. MICHELLE simulations of a Ka-Band electron gun are presented that include a thermal beam emission model for a hot cathode, and these are compared to “cold” beam simulation results. Details of the MICHELLE thermal beam model are described, including an explanation of different options for configuring the model in the user interface, and which settings were used. The effects of thermal velocity spread on beam-wave interaction in a Ka-Band CC-TWT are discussed with applications to interaction code simulations.