Development of high-power second-harmonic gyro-TWT

Qinsong Wang; David B. McDermott; Anthony T. Lin; Neville C. Luhmann Jr.; Julius Pretterebner

doi:10.1117/12.147466

8 July 1993 Development of high-power second-harmonic gyro-TWT

Qinsong Wang, David B. McDermott, Anthony T. Lin, Neville C. Luhmann Jr., Julius Pretterebner

Proceedings Volume 1872, Intense Microwave Pulses; (1993) https://doi.org/10.1117/12.147466
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

A Ka-band second-harmonic TE₂₁ gyro-TWT amplifier, capable of generating extremely high power, has been designed with a self-consistent nonlinear simulation code. To demonstrate that a harmonic gyro-TWT can generate significantly higher output power with better stability than fundamental gyro-TWT's due to the higher electron beam currents allowed for the weaker harmonic interaction, a Ku-band proof-of-principle experiment is being built at UCLA and described in this paper. An output power of 400 kW, with an efficiency of 20% and a constant-drive bandwidth of 6% have been predicted for this device. A single anode 100 kV, 20 A MIG is being built to generate the (alpha) equals (upsilon) _{(perpendicular})/(upsilon) _(parallel) equals 1 electron beam with (Delta) (upsilon) _PLL/(upsilon) _(parallel) equals 8%. A wide- bandwidth 0 dB two-mode phase-velocity coupler and a TE₂₁/TE₁₁ mode converter have been designed to couple the rf power into and out of the amplifier.

Citation Download Citation

Qinsong Wang, David B. McDermott, Anthony T. Lin, Neville C. Luhmann Jr., and Julius Pretterebner "Development of high-power second-harmonic gyro-TWT", Proc. SPIE 1872, Intense Microwave Pulses, (8 July 1993); https://doi.org/10.1117/12.147466

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