NDLI: Powerful free-electron masers with novel Bragg resonators

Content Provider	IEEE Xplore Digital Library
Author	Peskov, N.Yu. Ginzburg, N.S. Sergeev, A.S. Arzhannikov, A.V. Sinitsky, S.L. Kaminsky, A.K. Sedykh, S.N.
Copyright Year	2013
Description	Author affiliation: Joint Inst. for Nucl. Res., Dubna, Russia (Kaminsky, A.K.; Sedykh, S.N.) \|\| Inst. of Appl. Phys., Nizhny Novgorod, Russia (Peskov, N.Yu.; Ginzburg, N.S.; Sergeev, A.S.) \|\| Budker Inst. of Nucl. Phys., Novosibirsk, Russia (Arzhannikov, A.V.; Sinitsky, S.L.)
Abstract	High-efficiency Ka-band FEM-oscillator was elaborated during the last few years in collaboration between JINR (Dubna) and IAP RAS (N.Novgorod). The induction linac LIU-3000 (JINR), which generates a 0.8 MeV / 200 A / 250 ns electron beam with a repetition rate of 1 Hz, drives the FEM-oscillator. Transverse velocity in the magnetically guided beam is pumped in a helical wiggler of 6 cm period. The main advantages of the JINR-IAP FEM is the use of a reversed guide magnetic field, which provides high-quality beam formation in the tapered wiggler section with a low sensitivity to the initial beam spread, alongside with Bragg resonator having a step of phase of corrugation [2], which possesses high electrodynamical mode selection. As a result, stabile single-mode operation with high electron efficiency was achieved in the FEM. At the present stage the FEM generates 20 MW / 200 ns pulses at 30 GHz with the spectrum width of 6 - 7 MHz, which is close to the theoretical limit (Fig.2). Stability of the FEM radiation parameters (frequency, output power, pulse shape, etc.) was demonstrated over a sequence of ~ $10^{5}$ pulses.
Starting Page	31
Ending Page	33
File Size	716159
Page Count	3
File Format	PDF
e-ISBN	9781479910687
DOI	10.1109/MSMW.2013.6621993
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-23
Publisher Place	Ukraine
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Finite element analysis Distributed feedback devices Optical resonators Electron beams Microwave oscillators Masers Cavity resonators
Content Type	Text
Resource Type	Article

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