Long-pulse and CW tests of a 110-GHz gyrotron with an internal, quasi-optical converter
- Communications and Power Industries, Palo Alto, CA (United States)
- Naval Research Lab., Washington, DC (United States); and others
Electron cyclotron resonance heating (ECRH) requirements for planned fusion experiments such as the International Thermonuclear Experimental Reactor (ITER) will require millimeter-wave sources capable of output power levels of at least 1 MW CW at frequencies in the range 100--200 GHz. A high-power gyrotron, employing an internal converter that produces a Gaussian-like output mode, has been designed and tested. The tube employed a TE{sub 22,6,1}-mode interaction cavity that was designed for operation at a frequency of 110 GHz. An internal converter, consisting of an advanced launcher design and four mirrors, produced a Gaussian mode that had a relatively uniform profile at the tube output window to minimize the peak power density. Tests on the tube resulted in output power levels of 680, 530, and 350 kW for pulse durations of 0.5, 2.0, and 10.0 s, respectively. Measurements of the temperature of the output window were made during the long-pulse tests. Output power levels of 1 MW were achieved under short-pulse (1 ms) operation and the tube was operated at CW power levels in excess of 100 kW.
- DOE Contract Number:
- FC02-93ER54209
- OSTI ID:
- 377813
- Journal Information:
- IEEE Transactions on Plasma Science, Vol. 24, Issue 3; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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