A 670 GHz gyrotron with record power and efficiency
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M. Yu. Glyavin, A. G. Luchinin, G. S. Nusinovich, J. Rodgers, D. G. Kashyn, C. A. Romero-Talamas, R. Pu; A 670 GHz gyrotron with record power and efficiency. Appl. Phys. Lett. 8 October 2012; 101 (15): 153503. https://doi.org/10.1063/1.4757290
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This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in M. Yu. Glyavin, A. G. Luchinin, G. S. Nusinovich, J. Rodgers, D. G. Kashyn, C. A. Romero-Talamas, R. Pu; A 670 GHz gyrotron with record power and efficiency. Appl. Phys. Lett. 8 October 2012; 101 (15): 153503. https://doi.org/10.1063/1.4757290 and may be found at https://pubs.aip.org/aip/apl/article-abstract/101/15/153503/150937/A-670-GHz-gyrotron-with-record-power-and?redirectedFrom=fulltext
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Abstract
A 670 GHz gyrotron with record power and efficiency has been developed in joint experiments of the Institute of Applied Physics, Russian Academy of Sciences (Nizhny Novgord, Russia), and the University of Maryland (USA) teams. The magnetic field of 27–28 T required for operation at the 670 GHz at the fundamental cyclotron resonance is produced by a pulsed solenoid. The pulse duration of the magnetic field is several milliseconds. A gyrotron is driven by a 70 kV, 15 A electron beam, so the beam power is on the order of 1 MW in 10–20 ms pulses. The ratio of the orbital to axial electron velocity components is in the range of 1.2–1.3. The gyrotron is designed to operate in the TE31,8-mode. Operation in a so high-order mode results in relatively low ohmic losses (less than 10% of the radiated power). Achieved power of the outgoing radiation (210 kW) and corresponding efficiency (about 20%) represent record numbers for high-power sources of sub-THz radiation.