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Production of powerful spatially coherent radiation in planar and coaxial fem exploiting two-dimensional distributed feedback

Arzhannikov, A.V. and Cross, A.W. and Ginzburg, N.S. and He, Wenlong and Kalinin, P.V. and Konoplev, I.V. and Kuznetsov, S.A. and Peskov, N.Y. and Phelps, A.D.R. and Robertson, C.W. and Ronald, K. and Whyte, C.G. (2009) Production of powerful spatially coherent radiation in planar and coaxial fem exploiting two-dimensional distributed feedback. IEEE Transactions on Plasma Science, 37 (9). pp. 1792-1800. ISSN 0093-3813

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Two-dimensional distributed feedback is an effective method of producing ultrahigh-power spatially coherent radiation from an active medium, that is spatially extended along two coordinates, including relativistic electron beams with sheet and annular geometry. This paper describes the progress in the investigations of planar and coaxial free-electron masers (FEMs) based on a novel feedback mechanism. The theoretical analysis of these FEM schemes was conducted in the frame of the coupled-wave approach and 3-D simulations and agrees well with the experimental data obtained in ldquocoldrdquo and ldquohotrdquo tests. As a result, the effective transverse (azimuthal) mode selection has been demonstrated under a transverse size of about 20-25 wavelengths, and narrow-frequency multimegawatt microwave pulses have been generated in the Ka- and W-bands.

Item type: Article
ID code: 16918
Notes: Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.
Keywords: Free-electron maser, FEM, mode selection, powerful microwave radiation, 2-D distributed feedback, coherence, masers, microwave generation, Ka-bands, W-bands, coaxial free-electron maser, coupled wave, effective transverse mode selection, multimegawatt microwave pulse, Plasma physics. Ionized gases, Condensed Matter Physics, Nuclear and High Energy Physics
Subjects: Science > Physics > Plasma physics. Ionized gases
Department: Faculty of Science > Physics
Depositing user: Strathprints Administrator
Date Deposited: 07 Apr 2010 13:50
Last modified: 10 Dec 2015 19:07

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