Circuit design for a wide-band disk-loaded gyro-TWT amplifier

The design is presented for an all-metal wide-band disk-loaded gyro-TWT amplifier capable of continuous wave (CW) operation that is predicted to generate an output power of 55-75 kW with 30-dB gain and a bandwidth of 20%. The device will employ a magnetron injection gun to produce a 95-kV 5-A electron beam with /spl upsi//sub /spl perp////spl upsi//sub z/=0.6 and /spl Delta//spl upsi//sub z///spl upsi//sub z/=4%. The low dispersion of the periodically loaded rectangular waveguide circuit is predicted by an analytical theory and verified by the eigenmode algorithm of the particle-in-cell code, MAGIC. The concept will be tested in a pulsed, proof-of-principle experiment in the X-band. Except for the disk-loaded interaction circuit and transition, the hardware for the new device was previously employed in a dielectric-loaded wideband gyro-TWT, including the 0-dB E-plane-bend couplers and magnetron injection gun.