中国物理B ›› 2012, Vol. 21 ›› Issue (9): 94103-094103.doi: 10.1088/1674-1056/21/9/094103

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Gain enhancement in two-stream free electron laser with planar wiggler and axial guide magnetic field

S. Saviza, Z. Rezaeia, Farzin M. Aghamirb   

  1. a Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran;
    b Department of Physics, University of Tehran, N. Kargar Ave, Tehran 14399, Iran
  • 收稿日期:2011-12-18 出版日期:2012-08-01 发布日期:2012-08-01

Gain enhancement in two-stream free electron laser with planar wiggler and axial guide magnetic field

S. Saviza, Z. Rezaeia, Farzin M. Aghamirb   

  1. a Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran;
    b Department of Physics, University of Tehran, N. Kargar Ave, Tehran 14399, Iran
  • Received:2011-12-18 Online:2012-08-01 Published:2012-08-01
  • Contact: S. Saviz E-mail:azarabadegan@gmail.com

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摘要： The theory for the two-stream free electron laser (FEL) consisting of a relativistic electron beam transported along the axis of a planar wiggler in the presence of an axial guiding magnetic field is proposed and investigated. The electron trajectories and the small signal gain are derived. The characteristic of the linear gain and the normalized maximum gain are studied numerically. The result shows that the normalized maximum gain is considerably enhanced in comparison with that of the single stream. The effect of the difference between the energies of the two beams in this configuration of FEL is also considered, and we find that the gain is affected by the energy differences between groups 1 and 2.

关键词: two-stream, free-electron, laser

Abstract: The theory for the two-stream free electron laser (FEL) consisting of a relativistic electron beam transported along the axis of a planar wiggler in the presence of an axial guiding magnetic field is proposed and investigated. The electron trajectories and the small signal gain are derived. The characteristic of the linear gain and the normalized maximum gain are studied numerically. The result shows that the normalized maximum gain is considerably enhanced in comparison with that of the single stream. The effect of the difference between the energies of the two beams in this configuration of FEL is also considered, and we find that the gain is affected by the energy differences between groups 1 and 2.

Key words: two-stream, free-electron, laser

中图分类号:  (Free-electron lasers)

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