Improvement of Stability of High Cyclotron Harmonic Operation in the Double-Beam THz Gyrotrons

A double-beam scheme of a short-wavelength gyrotron operating at the second cyclotron harmonic is studied both within the framework of the averaged self-consistent approach and using 3-D particle in cell simulations. The analysis shows that the introduction of an additional generating electron beam...

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Published inIEEE transactions on plasma science Vol. 44; no. 8; pp. 1303 - 1309
Main Authors Ginzburg, Naum S., Glyavin, Mikhail Yu, Malkin, Andrey M., Manuilov, Vladimir N., Rozental, Roman M., Sedov, Anton S., Sergeev, Alexander S., Zaslavsky, Vladislav Yu, Zotova, Irina V., Idehara, Toshitaka
Format Journal Article
LanguageEnglish
Published New York IEEE 01.08.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Cyclotrons
Double-beam scheme
Electron beams
Electrons
Frequency conversion
gyrofrequency harmonics
Gyrotrons
Harmonic analysis
Mathematical model
mode competition
Plasma physics
Power supply
Power system harmonics
Simulation
starting current
terahertz gyrotrons
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Summary:A double-beam scheme of a short-wavelength gyrotron operating at the second cyclotron harmonic is studied both within the framework of the averaged self-consistent approach and using 3-D particle in cell simulations. The analysis shows that the introduction of an additional generating electron beam allows drastically increasing the operating current of a second-harmonic gyrotron with the simultaneous suppression of self-excitation of spurious modes at the fundamental harmonic. As a result, the radiated power of a double-beam gyrotron exceeds the power of a single-beam gyrotron by a factor of four. The developed concept makes it possible to realize high-power (several hundred watts) single-mode gyrotrons in the 0.7-1.0-THz frequency range.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2016.2585307