Development program for a 200-kW, c-w gyrotron. Quarterly report No. 12, April-June 1982

Technical Report · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6423601

DeHope, W J; Caplan, M; Ferguson, P E; Matranga, V A; Sandoval, J J; Tancredi, J J

The objective of this program is the design and development of a millimeter-wave device to produce 200 kW of continuous-wave power at 60 GHz. The device, a gyrotron oscillator, will be compatible with power delivery to an electron-cyclotron-heated plasma. During this report period, extensive low-duty testing on the 20-..mu..s modulator was performed, achieving 285 kW at 44% beam efficiency. The beam instability that plagued S/N 1 and resulted in excessive mod-anode interception current was circumvented with a smaller beam hole in the end of the lossy drift tube between cathode and cavity, and by operating the tube with a positively tapered magnetic field over the cathode. A new design optimization of the magnetron-injection gun was completed for use in the tapered magnetic field. Work on the collector was also accomplished including a study of the beam distribution using several defferent diagnostic techniques, a redesign of the ceramic insulating seals, and a full-scale mock-up of the c-w collector for mechanical integrity under high flow rates. Preliminary testing of S/N 2 was begun. Progress on the c-w facility continued.

• Research Organization: Hughes Aircraft Co., Torrance, CA (USA). Electron Dynamics Div.
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6423601
• Report Number(s): ORNL/SUB-79-33200/12; ON: DE83010911
• Country of Publication: United States
• Language: English

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