Design of 100 MW second harmonic gyroklystron for accelerator applications

Summary form only given, as follows. Detailed designs for a 17.14 GHz, 100 MW, 1 microsecond pulse, second harmonic gyroklystron amplifier suitable for driving future linear colliders are presented. The microwave circuit has increased in size as the power level in the system has increased, precipitating the need for a coaxial insert to increase intercavity isolation and to reduce spurious oscillations present in the circuit. The microwave circuit harbors a dielectrically loaded drift tube in addition to the two coaxial cavities and numerical simulations of efficiency and stability of the circuit are presented. Previous studies have shown that an efficiency of 35% is realizable. Other topics detailed in the effort to upgrade the system to accommodate the higher power level include the present state of the modulator, beam transport system, and the diagnostic system.