Coherent light generators – Free electron laser
Patent
1990-05-31
1991-09-24
Scott, Jr., Leon
Coherent light generators
Free electron laser
372 92, 315 4, 315 5, H01S 300
Patent
active
050520032
ABSTRACT:
In a quasi-optical gyrotron, two coils (3a, 3b) in a Helmholtz arrangement generrate a static magnetic field aligned parallel to an electron beam axis (2). As a result, the electrons passing along the electron beam axis (2) parallel to the magnetic field are forced into gyration and excite an alternating electromagnetic field in a quasi-optical resonator. The resonator comprises two mirrors (4a, 4b) arranged opposite to one another on a resonator axis (5). The resonator axis (5) is aligned perpendicularly to the electron beam axis (2) between the two coils (3a, 3b). The mirrors exhibit a mutual distance which is much greater than one half wavelength of the electromagnetic radiation. To generate a wideband radiation, at least one mirror, (4b) is moved at a high frequency by at least about one half wavelength of the electromagnetic radiation by a vibrator (10).
REFERENCES:
patent: 2383343 (1945-08-01), Ryan
patent: 4559475 (1985-12-01), Manheimel et al.
patent: 4839561 (1989-06-01), Ito
patent: 4926094 (1980-05-01), Bondeson et al.
International Journal of Electronics, vol. 57, No. 6, Dec. 1984, pp. 787-799, V. L. Granastein, "High Average Power and High Peak Gyrotrons: Prensent Capabilities and Future Prospects".
International Electron Devices Meeting, Washington, D.C., U.S., Dec. 6-9, 1987, pp. 804-807, K. E. Kreischer, et al., "Operation of a Step Tunable, Megawatt Gyrotron".
Asea Brown Boveri Ltd.
Jr. Leon Scott
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