Enhancement of coherent Smith-Purcell radiation at THz frequency

Peng Zhang, L. K. Ang, A. Gover, Y. Y. Lau, R. M. Gilgenbach

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper explores several mechanisms to enhance the coherent Smith-Purcell radiation (SPR) at THz frequencies. A simple analytical dispersion relation is derived to predict the operating frequency for both open grating and Orotron-like devices. The analytical predictions are in excellent agreement with particle-in-cell simulations. It is found that the start current for a continuous electron beam to excite coherent SPR can be reduced by orders of magnitude, by merely varying the groove width and height of the grating, with grating period and beam energy being held constant. Other mechanisms, such as prebunched beams and open cavity configurations are also investigated for the enhancement of coherent SPR.

Original languageEnglish
Title of host publicationProceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479971107
DOIs
StatePublished - 25 Aug 2015
Event16th IEEE International Vacuum Electronics Conference, IVEC 2015 - Beijing, China
Duration: 27 Apr 201529 Apr 2015

Publication series

NameProceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015

Conference

Conference16th IEEE International Vacuum Electronics Conference, IVEC 2015
Country/TerritoryChina
CityBeijing
Period27/04/1529/04/15

Keywords

  • Orotron
  • Smith-Purcell radiation
  • THz frequency
  • harmonics

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