Dynamics of the space charge limiting current in gyro-type devices

Summary form only given, as follows. The Air Force Phillips Lab is investigating the dynamic change interactions which occur between the growing electromagnetic waves generated in a gyro-type device, and an electron beam with non-zero perpendicular velocity operating near the space-charge limiting current. The 2-1/2D code MAGIC is being used to perform simulations of the TE/sub 01/ mode, and results will be presented. Initial results show that beams of this nature can suffer from a different kind of pulse shortening than typically found in other devices, thus placing an upper limit on the power and pulse length of gyro-type devices.