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  • Open Access

Electron beam requirements for a three-dimensional Smith-Purcell backward-wave oscillator for intense terahertz radiation

Kwang-Je Kim1 and Vinit Kumar2

  • 1Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
  • 2Raja Ramanna Center for Advanced Technology, Indore, India

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Phys. Rev. ST Accel. Beams 10, 080702 – Published 22 August, 2007

DOI: https://doi.org/10.1103/PhysRevSTAB.10.080702

Abstract

A Smith-Purcell device can operate as a backward-wave oscillator for intense, narrow-bandwidth, continuous wave radiation at terahertz wavelengths. We determine the requirements on electron beam current and emittance for the system to oscillate based on a three-dimensional extension of our previous two-dimensional analysis. It is found that specially designed electron beams are required with a current that exceeds a certain threshold value and a flat transverse profile that allows the beam to travel very close to the grating surface. Two methods for producing electron beams with the required characteristics are discussed.

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Phys. Rev. ST Accel. Beams 10, 080702– Published 22 August, 2007
  • Received 7 June 2006
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