Testing of a 3 MW, 140 GHz coaxial cavity gyrotron
Book
·
OSTI ID:153878
- Massachusetts Inst. of Technology, Cambridge, MA (United States)
- Physical Sciences, Inc., Alexandria, VA (United States)
A gyrotron designed to produce 3 MW at 140 GHz has been realized and tested The cavity is coaxial, with a desired operating mode of TE{sub 21,13}. The coaxial cavity was designed to have peak ohmic heating of 2.9 kW/cm{sup 2} with less mode competition, and thus a higher electronic efficiency (45%) than the 37% predicted for a hollow cavity with the same mode number. The efficiency calculations were done by a time dependent, multimode simulation. The results of the code are shown. The electron gun is an inverted MIG, with the ``intermediate`` anode at ground potential. The beam voltage and current are 95 kV and 84 A, and the cathode and beam radii, 4.7 cm and 0.815 cm, respectively. The beam velocity ratio, {alpha}, and perpendicular velocity spread, as predicted by EGUN, are 1.44 and 3.7%, respectively. Measurements of the power and frequency spectrum will be presented.
- OSTI ID:
- 153878
- Report Number(s):
- CONF-950612--; ISBN 0-7803-2669-5
- Country of Publication:
- United States
- Language:
- English
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