NDLI: Frequency-tunable CW gyro-BWO with a helically rippled operating waveguide

Content Provider	IEEE Xplore Digital Library
Author	Denisov, G.G. Samsonov, S.V. Bratman, V.L. Bogdashov, A.A. Glyavin, M.Yu. Luchinin, A.G. Lygin, V.K. Thumm, M.
Copyright Year	2004
Description	Author affiliation: Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia (Denisov, G.G.; Samsonov, S.V.; Bratman, V.L.; Bogdashov, A.A.; Glyavin, M.Yu.; Luchinin, A.G.; Lygin, V.K.)
Abstract	The gyrotron backward-wave oscillator (gyro-BWO) is known as a source of frequency-tunable high-power coherent radiation, which is attractive for a number of applications. This was the motivation to develop a CW tunable gyro-BWO with a power of several kilowatts at the frequency of about 24 GHz. The gyro-BWO exploits a DC oil-cooled magnet with magnetic field up to 0.5 T and utilizes a weakly-relativistic (20 keV) electron beam produced by a magnetron injection gun. A stable generation at the second cyclotron harmonic with a maximum power of 7 kW and interaction efficiency of 15% at the frequency of 24.7 GHz was achieved. Smooth oscillation frequency tuning by varying the magnetic field was measured to be as wide as 5% at half-power level. The use of a depressed collector provided an efficiency increase up to 23% and an opportunity for a reduction of the main power supply voltage down to 10 kV.
Sponsorship	Univ. of Karlsruhe Karlsruhe Res. Center
Starting Page	235
Ending Page	236
File Size	146318
Page Count	2
File Format	PDF
ISBN	0780384903
DOI	10.1109/ICIMW.2004.1422041
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-27
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Magnetic field measurement Gyrotrons Oscillators Magnetic fields Electron beams Power generation Cyclotrons Power system harmonics Tuning
Content Type	Text
Resource Type	Article

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