Development program for a 200 kW, cw, 28-GHz gyroklystron. Quarterly report No. 12, January--March 1979

Technical Report · Mon Jan 01 00:00:00 EST 1979

OSTI ID:5991874

Jory, H; Evans, S; Hegji, S; Shively, J; Symons, R; Taylor, N

The objective of this program is to develop a microwave amplifier or oscillator capable of producing 200 kW CW power output at 28 GHz. The use of the gyrotron or cyclotron resonance interaction is being pursued. Design changes, construction and testing of several CW oscillators is discussed. Tube number 4, which used a miter bend output system, was tested to 97.2 kW CW output at Varian. It was shipped to Oak Ridge and failed from rf heating damage to the collector ceramic insulator. Tube number 2 was rebuilt with a number of minor design changes. It produced 92.1 kW CW at Varian for a short time, but failed as a result of a vacuum leak at the output window. Construction and cold testing of tube number 5 are described. This tube uses an axisymmetric output waveguide with a taper to 5 in diameter for the collector region followed by a taper back down to 2.5 in diameter.

• Research Organization: Varian Associates, Inc., Palo Alto, CA (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5991874
• Report Number(s): ORNL/SUB-01617/12
• Country of Publication: United States
• Language: English

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