Plural Interactions of Waves in Multiharmonic Two-stream Superheterodyne Free-electron Lasers with Helical Electron Beams

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

Sumy State University, 2, Rimsky-Korsakov Str., 40007 Sumy, Ukraine

Issue Volume 10, Year 2018, Number 2
Dates Received 25 March 2018; revised manuscript received 27 April 2018; published online 29 April 2018
Citation A.V. Lysenko, I.I. Volk, G.A. Oleksiienko, J. Nano- Electron. Phys. 10 No 2, 02014 (2018)
PACS Number(s) 41.60.Cr, 52.35. – g, 52.35.Mw
Keywords Two-stream superheterodyne free-electron lasers, Two-stream instability, Helical electron beams, Plural three-wave resonances.

We carried out an analysis of plural wave interactions in multiharmonic two-stream superheterodyne free-electron lasers (FELs) of H-ubitron type with helical relativistic electron beams (REB) in the small signal approximation. The cases of monochromatic and multiharmonic input signals were studied. We demonstrated that investigated multiharmonic FELs have higher amplification rates compared with two-stream superheterodyne FELs using straight REBs. We found out that frequency spectrum of electromagnetic signal forming in multiharmonic two-stream superheterodyne FELs with helical REBs is broader in comparison with frequency spectrum in similar FELs using straight REBs.

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