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Simulation of Smith-Purcell terahertz radiation using a particle-in-cell code

Abstract : A simulation of the generation of Smith-Purcell (SP) radiation at terahertz frequencies has been performed using the two-dimensional particle-in-cell code MAGIC. The simulation supposes that a thin (but infinitely wide) monoenergetic electron beam passes over a diffraction grating. We simulate two configurations, one similar to the Dartmouth SP free-electron laser, with a low-energy continuous beam (we use an axial magnetic field to constrain the electrons to essentially one-dimensional motion). The other is similar to the recent MIT experiment that uses a prebunched 15 MeV beam.
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J.T. Donohue, J. Gardelle. Simulation of Smith-Purcell terahertz radiation using a particle-in-cell code. Physical Review Special Topics - Accelerators and Beams, 2006, 9, pp.060701. ⟨10.1103/PhysRevSTAB.9.060701⟩. ⟨in2p3-00084456⟩

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