Longitudinal Magnetic Field Effect on Wave Dynamics in Multiharmonic Superheterodyne FEL of Dopplertron Type with Helical Electron Beam

Authors A.V. Lysenko , G.A. Oleksiienko , I.I. Volk , M.A. Korovai

1Sumy State University, 2, Rimsky-Korsakov St., 40007 Sumy, Ukraine

Е-mail lysenko_@ukr.net
Issue Volume 4, Year 2012, Number 3
Dates Received 25 September 2019; revised manuscript received December 2019; published online 13 December 2019
Citation A.V. Lysenko[footnoteRef:], G.A. Oleksiienko, I.I. Volk, M.A. Korovai, J. Nano- Electron. Phys. 4 No 3, 03001 (2012)
DOI https://doi.org/10.21272/jnep.11(6).06030
PACS Number(s) 41.60.Cr, 52.59.Ye
Keywords Superheterodyne free-electron laser, Plasma-beam instability, Parametric resonance, Helical relativistic electron beam, Focusing magnetic field.
Annotation . We have defined the minimal value of the magnetic field strength (critical value of the magnetic field strength) for the amplification regime in which the right-polarized electromagnetic wave is used as pumping. It is found that the investigated effect is related to the dependence of the conditions of the three-wave parametric resonance of the signal, pumping and the space charge wave on the longitudinal magnetic field strength. The growth rate related to the abovementioned three-wave resonant interaction depends substantially on the focusing magnetic field strength. We have demonstrated that plasma-beam superheterodyne free-electron laser of dopplertron type with a helical relativistic electron beam is able to form powerful coherent electromagnetic radiation in the millimeter wavelength band.

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