The in-fluence of local off-axis magnetic fields and betatron oscillations on individual particles is included in the gain computations. (Author) Source of Abstract (Subfile): AIA A / TIS Keywords: *ENERGY CONVERSION EFFICIENCY; *FREE ELECTRON LASERS; *LASER OUTPUTS; *LIGHT AMPLIFIERS; *WIGGLER MAGNETS; COMPTON EFFECT; FRESNEL INTEGRALS; LASER: CAVITIES; LASER MATERIALS; LASER MODES; LINEAR POLARIZATION; MAGNETIC FIELD CONFIGURATIONS; MATHEMATICAL MODELS Subject Classification: 7536 Lasers & Masers (1975-) Operation of a compact MM-wave high-harmonic gyrotron. MCDERMOTT, D. B. ; LUHMANN, N. C., JR. (California, University, Los Angeles, CA) IN: Millimeter wave technology II; Proceedings of the Meeting, San Diego, CA, August 23, 24, 1983 (A85-24926 10-33). Bellingham, WA, SPIE - The International Society for Optical Engineering, 1983, p. 58-63. 11 Refs. Contract No.: DAAG29-82-K-0004; AF-AFOSR-81-0200 Language: Eng1i sh. Country of Origin: United States. Country of Publication: United States Document Type: CONFERENCE PAPER Most documents available from AIAA Technical Library Journa1 Announcement: IAAB510 The operation of a millimeter-wave harmonic gyrotron is described in which the interaction is between large-orbit axis-encircling electrons and cylindrical cavity TEn11 modes. Gyrotron cavities operating on this principle are well matched to low current, moderate energy, rf — accelerated electron beams (approximately 100 mA, approximately 250 keV). Efficiencies up to 15 percent have been measured for moderate harmonic interactions and multi-kW power levels have been attained at the eleventh harmonic of the cyclotron frequency. The concept, allows the magnetic field of the gyrotron to be reduced by an order of magnitude, thereby making a submillimeter-wave gyrotron feasible. However, mode competition problems must be considered for high-harmonic, submillimeter wave operation. Mode competition has been successfu11y suppressed by destroying unwanted m o des. T he beam current requ i red for osc i11 at i on is highly dependent on the electron perpendicular energy. The energy requirement can be reduced by die1ectric 1oading of the gyrotron cavity. Testing a 30 dB gain, twelfth-harmonic g yro-k1ystron amp1i f ier was aIso b e g un. (Aut hor) Source of Abstract (Subfile): AIAA/TIS Keyword s: *CYCLOTRON RESONANCE DEVICES; *HARMON1C GENERATIONS; *MICROWAVE AMPLIFIERS; *MICROWAVE OSCILLATORS; *MILL IMETER WAVES; CAVITY RESONATORS; CYCLOTRON FREQUENCY; ELECTRON TRAJECTORIES; ENERGY CONVERSION EFFICIENCY; KLYSTRONS Subject Classification; 7533 Electronics & Electrical Engineering (1975-) Acousto-optics for systems applications. SPEZIO, A. E.; LEE, J.; ANDERSON, G. W. (U.S. Navy,
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