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Konoplev IV, Cross AW, Phelps AD, et al. Experimental and theoretical studies of a coaxial free-electron maser based on two-dimensional distributed feedback. Phys Rev E Stat Nonlin Soft Matter Phys. 2007;76(5):056406doi: 10.1103/PhysRevE.76.056406.
Konoplev, I. V., Cross, A. W., Phelps, A. D., He, W., Ronald, K., Whyte, C. G., Robertson, C. W., MacInnes, P., Ginzburg, N. S., Peskov, N. Y., Sergeev, A. S., Zaslavsky, V. Y., & Thumm, M. (2007). Experimental and theoretical studies of a coaxial free-electron maser based on two-dimensional distributed feedback. Physical review. E, Statistical, nonlinear, and soft matter physics, 76(5), 056406. https://doi.org/10.1103/PhysRevE.76.056406
Konoplev, I V, et al. "Experimental and theoretical studies of a coaxial free-electron maser based on two-dimensional distributed feedback." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 76,5 (2007): 056406. doi: https://doi.org/10.1103/PhysRevE.76.056406
Konoplev IV, Cross AW, Phelps AD, He W, Ronald K, Whyte CG, Robertson CW, MacInnes P, Ginzburg NS, Peskov NY, Sergeev AS, Zaslavsky VY, Thumm M. Experimental and theoretical studies of a coaxial free-electron maser based on two-dimensional distributed feedback. Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Nov;76(5):056406. doi: 10.1103/PhysRevE.76.056406. Epub 2007 Nov 30. PMID: 18233775.
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Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Nov;76(5):056406. doi: 10.1103/PhysRevE.76.056406. Epub 2007 Nov 30.

Experimental and theoretical studies of a coaxial free-electron maser based on two-dimensional distributed feedback.

Physical review. E, Statistical, nonlinear, and soft matter physics

I V Konoplev, A W Cross, A D R Phelps, W He, K Ronald, C G Whyte, C W Robertson, P MacInnes, N S Ginzburg, N Yu Peskov, A S Sergeev, V Yu Zaslavsky, M Thumm

Affiliations

  1. SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom. [email protected]

PMID: 18233775 DOI: 10.1103/PhysRevE.76.056406

Abstract

The first operation of a coaxial free-electron maser (FEM) based on two-dimensional (2D) distributed feedback has been recently observed. Analytical and numerical modeling, as well as measurements, of microwave radiation generated by a FEM with a cavity defined by coaxial structures with a 2D periodic perturbation on the inner surfaces of the outer conductor were carried out. The two-mirror cavity was formed with two 2D periodic structures separated by a central smooth section of coaxial waveguide. The FEM was driven by a large diameter (7 cm), high-current (500 A), annular electron beam with electron energy of 475 keV. Studies of the FEM operation have been conducted. It has been demonstrated that by tuning the amplitude of the undulator or guide magnetic field, modes associated with the different band gaps of the 2D structures were excited. The Ka-band FEM generated 15 MW of radiation with a 6% conversion efficiency, in good agreement with theory.

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