Power orotron-type Ka-band amplifier

The first results on experimental investigation of two-stage resonance generator and amplifier have been demonstrated recently. The electrodynamics system was composed of two identical stages formed by open resonator (OR) and lamella-type periodic structure (PS) situated on a plane mirror. The milling technology of PS had provided a period accuracy of the order of 5-6%. As we determined by modeling such period accuracy may be the origin of bad device efficiency and gain by reason of bad synchronism mechanism. In addition the inaccuracy of beam transfer channel height limited the beam current. To improve the PS period and channel accuracy up to 0.7% we modified the design and used the electrospark technology. The search of optimal gain and efficiency regimes by computer-aided design is covered