Experimental tests of a 263 GHz gyrotron for spectroscopic applications and diagnostics of various media

• Published in: Review of scientific instruments Vol. 86; no. 5; p. 054705
• Main Authors: Glyavin, M. Yu, Chirkov, A. V., Denisov, G. G., Fokin, A. P., Kholoptsev, V. V., Kuftin, A. N., Luchinin, A. G., Golubyatnikov, G. Yu, Malygin, V. I., Morozkin, M. V., Manuilov, V. N., Proyavin, M. D., Sedov, A. S., Sokolov, E. V., Tai, E. M., Tsvetkov, A. I., Zapevalov, V. E.
• Format: Journal Article
• Language: English
• Published: United States American Institute of Physics 01.05.2015
• Subjects: Computer control; Continuous radiation; CONTROL; COOLANTS; CURRENTS; Cyclotron resonance devices; GHZ RANGE; INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Low currents; MHZ RANGE; MICROWAVE AMPLIFIERS; MICROWAVE RADIATION; NMR; NUCLEAR MAGNETIC RESONANCE; OPERATION; POLARIZATION; Scientific apparatus & instruments; Spectrometers; Spectroscopy; TUNING; VARIATIONS
• ISSN: 0034-6748; 1089-7623
• DOI: 10.1063/1.4921322

A 263 GHz continuous-wave (CW) gyrotron was developed at the IAP RAS for future applications as a microwave power source in Dynamic Nuclear Polarization / Nuclear magnetic resonance (DNP/NMR) spectrometers. A new experimental facility with a computerized control was built to test this and subsequent gyrotrons. We obtained the maximum CW power up to 1 kW in the 15 kV/0.4 A operation regime. The power about 10 W, which is sufficient for many spectroscopic applications, was realized in the low current 14 kV/0.02 A regime. The possibility of frequency tuning by variation of the coolant temperature about 4 MHz/1 °C was demonstrated. The spectral width of the gyrotron radiation was about 10−6.