Title :
A CW quasioptical gyrotron for materials processing
Author :
Fischer, R.P. ; Fliflet, Arne W.
Author_Institution :
Beam Phys. Branch, Naval Res. Lab., Washington, DC, USA
Abstract :
Summary form only given. 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 /spl mu/sec pulses. A new application of the QOG is in the rapid sintering of high-strength ceramic materials and other heating processes. Millimeter-wave radiation is expected to heat samples much more uniformly and rapidly than conventional furnaces, resulting in improved material properties. 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 0.9 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.
Keywords :
ceramics; gyrotrons; microwave generation; microwave heating; millimetre wave tubes; sintering; 1.5 A; 13 mus; 13.5 cm; 150 kW; 20 kV; 20 percent; 4 kW; 6.9 cm; 70 cm; 75 to 95 GHz; CW quasioptical gyrotron; asymmetric quasioptical resonator; high power source; high-strength ceramic materials; materials processing; millimeter-wave radiation; mirror alignment; quality factor; rapid sintering; Ceramics; Furnaces; Gyrotrons; Heating; Laboratories; Material properties; Materials processing; Mirrors; Power generation; Production;
Conference_Titel :
Plasma Science, 1996. IEEE Conference Record - Abstracts., 1996 IEEE International Conference on
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-3322-5
DOI :
10.1109/PLASMA.1996.551681
