High performance orotron utilizing a dense electron beam

Details High performance orotron utilizing a dense electron beam High performance orotron utilizing a dense electron beam

1984-03-30

1986-02-18

Sikes, William L.

Coherent light generators

Free electron laser

372 9, 372 20, 315 36, 315 4, 315 5, H01S 300

Patent

active

045717265

ABSTRACT:
A method and apparatus for increasing the power output and efficiency of an orotron generating near millimeter wavelength radiation. In accordance with a theory of orotron operation described herein and confirmed experimentally, the ribbon-like electron beam utilized in the orotron has a very high current density to effect a large increase in orotron output power and efficiency due to space-charge effects in the beam. In the preferred embodiment, the high density electron beam is generated by a closely-packed rectangular array of field-emission cathodes.

REFERENCES:
Wortman et al., "Millimeter-Wave Orotron Oscillation-Part II: Exp."; IEEE ur. Quant. Elect., vol. QE-17, No. 8, Aug. 1981.
Wortman et al., "Improved Orotron Performance in the 50 to 75 GHz Freq. Region"; IEEE Transact. on Electron. Devices, vol. ED-29, No. 10, Oct. '82.
Leavitt et al., "Effects of Space Charge on the Performance of an Orotron"; J. Appl. Phys. 54(5), May 1983.
Spindt; "Spindt Cold Cathode Electron Gun Development"; NASA Report No. CR-168212, May 1983.

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