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    • Growth rate enhancement of free-electron laser by two consecutive wigglers with axial magnetic field

      A Hasanbeigi A Farhadian E Khademi Bidhendi

      Research Articles Volume 82 Issue 6 June 2014 pp 1049-1060

    • Fulltext

       

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      https://www.ias.ac.in/article/fulltext/pram/082/06/1049-1060

    • Keywords

       

      Free-electron laser; consecutive wiggler; axial guide field; growth rate.

    • Abstract

       

      The operative mechanism for a free-electron laser (FEL) with two consecutive helical wigglers having opposite circular polarization in the presence of an axial magnetic field is proposed and analysed. With the help of fluid theory, a tenth-degree polynomial dispersion equation for electromagnetic and space-charge waves is derived. The results are used to illustrate and discuss the dependence of growth rate on different system parameters. Finally, it is shown that for the same system parameters the growth rate of the proposed structure is more than the growth rate of instability in a conventional FEL.

    • Author Affiliations

       

      A Hasanbeigi1 A Farhadian1 E Khademi Bidhendi1

      1. Department of Physics and Institute for Plasma Research, Kharazmi University, 43 Dr Mofatteh Avenue, Tehran 15614, Iran

    • Dates

       
      Published
      June 2014
      Manuscript received
      13 January 2013
      Manuscript revised
      5 December 2013
      Accepted
      8 January 2014
      Early published
      3 June 2014

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