Simulation of a Smith-Purcell free-electron laser with sidewalls: Copious emission at the fundamental frequency

Journal Article · Mon Oct 17 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3641471· OSTI ID:22027777

Donohue, J T ^[1]; Gardelle, J ^[2]

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1. Centre d'Etudes Nucleaires de Bordeaux-Gradignan, Universite Bordeaux 1, CNRS/IN2P3, BP 120, Gradignan 33175 (France)
2. CEA, CESTA, F-33114 Le Barp (France)

The two-dimensional theory of the Smith-Purcell free-electron laser of Andrews and Brau [H. L. Andrews and C. A. Brau, Phys. Rev. ST Accel. Beams 7, 070701 (2004)] predicts that coherent Smith-Purcell radiation can occur only at harmonics of the frequency of the evanescent wave that is resonant with the beam. A particle-in-cell simulation shows that in a three-dimensional context, where the lamellar grating has sidewalls, coherent Smith-Purcell radiation can be copiously emitted at the fundamental frequency, for a well-defined range of beam energy.

• OSTI ID: 22027777
• Journal Information: Applied Physics Letters, Vol. 99, Issue 16; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
43 PARTICLE ACCELERATORS
BEAM PRODUCTION
BEAM-PLASMA SYSTEMS
FREE ELECTRON LASERS
HARMONICS
LASER-PRODUCED PLASMA
PHOTON EMISSION
PLASMA SIMULATION
THREE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS