ISSN: 2077-6772 (Print)

e-ISSN: 2306-4277 (Online)

Transportation of Low-voltage Sheet Helical Electron Beam for Confocal Gyrotron with Pulsed Magnetic System

Authors	Yu.S. Kovshov¹, S.V. Starokozhev¹, S.A. Kishko¹, S.S. Ponomarenko¹, S.A. Vlasenko¹^,², A.N. Kuleshov¹, B.P. Yefimov¹
Affiliations	¹ O.Ya. Usikov Institute for Radiophysics and Electronics National Academy of Sciences of Ukraine, 12, Ac. Proscura St., 61085 Kharkiv, Ukraine ² V.N. Karazin Kharkiv National University, 4, Svobody Sq., 61022 Kharkiv, Ukraine
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Issue	Volume 7, Year 2015, Number 3
Dates	Received 05 May 2015; published online 20 October 2015
Citation	Yu.S. Kovshov, S.V. Starokozhev, S.A. Kishko, et al., J. Nano- Electron. Phys. 7 No 3, 03039 (2015)
DOI
PACS Number(s)	41.85.Ja
Keywords	Low-voltage cyclotron resonance maser, Sheet helical electron beam, Pulsed magnetic system, Planar magnetron-injection gun, Confocal gyrotron.
Annotation	Gyrotrons with opened cavities which consist of two confocal cylindrical mirrors are promising sources of electromagnetic radiation in submillimeter range because of a sufficient level of output power, frequency stability and the possibility of tuning the operating frequency over a wide range. It is necessary for a large number of scientific and practical applications. In this paper for efficiently excite oscillations of the electrodynamic system of a confocal CRM-gyrotron in 4-millimeter wavelength range we propose to use a sheet helical electron beam formed by the planar magnetron injection gun in an adiabatically increasing magnetic field of the order of 3 T in the cavity region. In the paper we offer the pulsed magnetic system which creates a magnetic field with a high degree of uniformity in the cavity region and the field with optimal distribution for adiabatic input of electron beam. The possibility of forming a helical sheet of an electron beam with a high value of the pitch-factor and low-velocity and electron energies spread was shown as a result of the trajectory analysis.
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