Experimental investigation of a phased-locked harmonic multiplying inverted gyrotwystron

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:433863

Guo, H; Rodgers, J; Chen, S; Walter, M; Granatstein, V L ^[1]

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1. Univ. of Maryland, College Park, MD (United States). Inst. for Plasma Research

The University of Maryland is investigating harmonic multiplication as a means of generating high frequency, large bandwidth, high power microwaves with reduced magnetic field and high subharmonic injection gain. The current experimental efforts are concentrated don two-stage devices. One of them is the phase-locked, harmonic-multiplying inverted gyrotwystron (phigtron) which uses a MIG produced electron beam (60 kV, 10 A), a combined mode launcher/input coupler, a Ku band fundamental gyro-TWT prebunching section, a radiation-free drift section, and a Ka band special complex cavity as output section. The bandwidth of this phigtron is expected to be improved over that of a gyroklystron since the input cavity is replaced by a traveling wave interaction structure. The second harmonic content of the beam may develop within both the input section and the drift space, and this allows the use of a smaller input signal. For a proof-of-principle experiment, a hot test tube was built. Initial experimental data will be provided in this presentation and will be compared with theoretical predictions. Finally, the feasibility of using a phigtron configuration with second harmonic prebunching and fourth harmonic output to realize a compact, high performance MMW power source at 94 GHz is discussed.

• Sponsoring Organization: Department of Defense, Washington, DC (United States)
• OSTI ID: 433863
• Report Number(s): CONF-960634--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DESIGN
ELECTRON GUNS
FEASIBILITY STUDIES
FREQUENCY MIXING
MICROWAVE AMPLIFIERS
MODE LOCKING