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Three-Dimensional Simulations of Coherent Smith–Purcell Radiation Using a Particle-in-Cell Code

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2 Author(s)
J. Gardelle ; Centre d'Etudes Scientifiques et Tech. d'Aquitaine, Commissariat de IEnergie Atomique, Le Barp ; J. T. Donohue

A few years ago, a new theory for producing coherent Smith-Purcell radiation from an initially continuous electron beam was proposed. It was 2-D, and it has been supported by particle-in-cell code simulations, although no experiments have, until now, provided confirmation. In fact, all experiments used a round beam, for which the 2-D theory may not be valid. We report here on a two-pronged attack on this problem. A 3-D simulation in the microwave domain indicates that coherent radiation, at a frequency near that of the 2-D simulation, should be produced. We are also preparing a demonstration experiment using an intense finite-width sheet beam to confirm the theory and simulations.

Published in:

IEEE Transactions on Electron Devices  (Volume:56 ,  Issue: 5 )