Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1984-07-12
1985-12-17
Chatmon, Saxfield
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 3, 315 5, 315 524, 372 2, 372 99, H01J 2500
Patent
active
045594759
ABSTRACT:
A method and apparatus for suppressing lower order cyclotron harmonics in order to permit resonance within a quasi-optical gyrotron/gyroklystron configuration of a desired higher order harmonic. In the gyrotron/gyroklystron configuration at least one open resonator defined by at least two mirrors is positioned downstream from an electron beam source for receiving therethrough the beam of electrons and for exchanging energy therewith. This method includes the steps of choosing a mirror radius size .rho. for the mirrors forming the at least one open resonator which is large enough relative to the spot size of a desired radiation cyclotron harmonic .omega..sub.n so that the harmonic .omega..sub.n oscillates within the at least one resonator, but small enough so that the spot size for the next lower cyclotron harmonic .omega..sub.m is larger than the mirror so that the harmonic .omega..sub.m does not oscillate due to diffraction losses. This method further includes the step of generating an electron beam via the electron beam source with a beam current which is greater than or equal to the starting current I.sub.n for the desired nth cyclotron harmonic, but less than the starting current I.sub.m for the mth cyclotron harmonic. The method also includes the step of extracting radiation energy at the nth cyclotron harmonic from the at least one open resonator. The desired mirror radius size .rho. for a given cyclotron harmonic frequency .omega..sub.n, for a desired diffraction loss Y.sub.n for that harmonic n, a given half length separation L.sub.y between the mirrors, and a given radius of curvature R.sub.M, can be determined by the equation ##EQU1## wherein r.sub.on is the spot size at the mirror for radiation at the nth cyclotron harmonic.
REFERENCES:
patent: 3253226 (1966-05-01), Herriott et al.
patent: 3479620 (1969-11-01), Rigrod
patent: 4197483 (1980-04-01), Karayianis et al.
patent: 4282458 (1981-08-01), Barnett
patent: 4298824 (1981-11-01), Walsh
patent: 4370621 (1983-01-01), Sprangle et al.
patent: 4389593 (1983-06-01), DeSantis et al.
patent: 4398121 (1983-08-01), Chodorow et al.
patent: 4491765 (1985-01-01), Manheimer et al.
patent: 4517677 (1985-05-01), Altmann
patent: 4519708 (1985-05-01), Perlmutter et al.
Bondeson et al., "Multimode Theory and Simulation of Quasioptical Gyrotrons nd Gyroklystrons" Int. J. Electronics, 1982, vol. 53, No. 6, pp. 547-553.
Levush et al., "Theory of Quasioptical Gyrotrons and Gyroklystrons Operating at Higher Harmonics of the Cyclotron Frequency" Int. J. Electronics, 1983, vol. 54, No. 6, pp. 749-775.
Ott et al., "Theory of Microwave Emission by Velocity-Space Instabilities of an Intense Relativistic Electron Beam" IEEE Transactions on Plasma Science, vol. PS-3, No. 1, Mar. 1975.
Bondeson et al., "Multimode Analysis of Quasi-Optical Gyrotrons and Gyroklystrons" Infrared and Millimeter Waves, vol. 9, Chapter 7, pp. 309-340, 1983.
Levush et al., "Cavity Design for Quasi-Optical Gyrotron and Gyroklystron Operation at Harmonics of the Cyclotron Frequency" Intl J. Infrared and Millimeter Waves, Nov. 1983, pp. 877-889.
Levush et al., "Generation of High Frequency Radiation by Quasi-Optical Gyrotron at Harmonics of the Cyclotron Frequency", Sep. 1983, Posted at Conference on Bulletin Board, Beams 83 International Conference on Intense Particle Beams.
Levush Baruch
Manheimer Wallace
Beers Robert F.
Chatmon Saxfield
Ellis William T.
The United States of America as represented by the Secretary of
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