Title :
Harmonic results of a 460 GHz gyrotron
Author :
Hornstein, Melissa K. ; Bajaj, Vikram S. ; Griffin, Robert G. ; Kreischer, Kenneth E. ; Mastovsky, Ivan ; Shapiro, Michael A. ; Sirigiri, Jagadishwar R. ; Temkin, Richard J.
Author_Institution :
Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
We report the first results of a 460 GHz second harmonic gyrotron. In microsecond pulse length operation at 13 kV and 110 mA, power levels in the order of 1 W have been observed at the TE2,6 mode at 456.2 GHz and the TE0,6 mode at 458.6 GHz. Modes at the fundamental, including the TE0,3 at 238 GHz and the TE2,3 at 233 GHz, have output powers up to 70 W. The TE5,2 mode was observed to tune continuously in frequency from 246 GHz to 248 GHz. The gyrotron is being processed for CW operation. At present, more than 12 W have been obtained in CW operation in the TE2,3 mode at 233 GHz.
Keywords :
gyrotrons; harmonics; submillimetre wave generation; submillimetre wave tubes; tuning; 1 W; 110 mA; 12 W; 13 kV; 233 GHz; 238 GHz; 246 to 248 GHz; 456.2 GHz; 458.6 GHz; 460 GHz; 70 W; CW operation; TE0,3 mode; TE0,6 mode; TE2,3 mode; TE2,6 mode; continuous frequency tuning; fundamental mode operation; microsecond pulse length operation; second harmonic gyrotron; Frequency; Gyrotrons; Magnetic field measurement; Nuclear and plasma sciences; Oscillators; Power measurement; Power system harmonics; Pulse measurements; Pyroelectricity; Voltage;
Conference_Titel :
Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International
Print_ISBN :
0-7803-8261-7
DOI :
10.1109/IVELEC.2004.1316180
