High efficiency 1.7 GHz gyropeniotron amplifier

Summary Form only given, as follows. Proposed applications require a highly efficient, high-power source to drive accelerators in the 0.8-1.7 GHz region. The gyropeniotron is projected to operate at high frequencies with an efficiency in excess of 75%. The saturated power and efficiency of the gyropeniotron amplifier in a cylindrical waveguide with the slotted structure have been calculated from a three-dimensional self-consistent theory. Design parameters have been determined for a 17-GHz gyropeniotron operating in the second cyclotron harmonic with a 100-kV, 10-A beam. For an ideal axis-encircling beam, the calculated efficiency is 78%. For a realistic beam with 2% axial velocity spread and 5% guiding center spread, the efficiency is only reduced to 66%. The saturated power is 660 kW. Power in excess of 1 MW can be obtained with a higher-energy beam.<>