A CW quasioptical gyrotron for materials processing

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:438859

Fischer, R P; Fliflet, A W ^[1]

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1. Naval Research Lab., Washington, DC (United States)

The quasioptical gyrotron (QOG) is under development at the Naval Research Laboratory as a high power source of millimeter-wave radiation. Recent experimental results include the production of up to 150 kW output power with 20% efficiency in 13 {micro}sec pulses. A new application of the QOG is in the rapid sintering of high-strength ceramic materials and other heating processes. The new experiment is designed to produce 4 kW average power from 75--95 GHz using a 20 kV, 1.5 A dc electron beam. The quasioptical resonator comprises two mirrors 6.9 and 13.5 cm in diameter separated by 70 cm with 3% diffractive output coupling at 85 GHz. Cold tests of the asymmetric quasioptical resonator are being performed to measure the quality factor (Q) and variation of Q with mirror alignment. Initial testing of the gyrotron will involve pulsed measurements of output power, efficiency, electron pitch angle, mode spectrum, and output radiation pattern. This tunable quasioptical gyrotron will complement existing material processing experiments at 2.45 and 35 GHz.

• Sponsoring Organization: Office of Naval Research, Washington, DC (United States)
• OSTI ID: 438859
• Report Number(s): CONF-960634--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
CAVITY RESONATORS
CERAMICS
DESIGN
MICROWAVE AMPLIFIERS
MICROWAVE HEATING
PERFORMANCE
SINTERING