CIRCUIT-DESIGN FOR A WIDE-BAND DISK-LOADED GYRO-TWT AMPLIFIER

The design is presented for an all-metal wide-band disk-loaded gyro-TW T amplifier capable of continuous wave (CW) operation that is predicte d to generate an output power of 55-75 kW with 30-dB gain and a bandwi dth of 20%, The device will employ a magnetron injection gun to produc e a 95-kV 5-A electron beam with v(perpendicular to)/v(z) = 0.6 and De lta v(z)/v(z) = 4%. The low dispersion of the periodically loaded rect angular waveguide circuit is predicted by an analytical theory and ver ified 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 tran sition, the hardware for the new device was previously employed in a d ielectric-loaded wideband gyro-TWT, including the 0-dB E-plane-bend co uplers and magnetron injection gun.