中国物理B ›› 2025, Vol. 34 ›› Issue (1): 14102-014102.doi: 10.1088/1674-1056/ad8869

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Influence of quasi-electrostatic support on amplification of space charge waves in amplification section of a superheterodyne free electron laser

A. V. Lysenko† and S. S. Ilin   

  1. Sumy State University, 116, Kharkivska st., 40007 Sumy, Ukraine
  • 收稿日期:2024-06-22 修回日期:2024-10-01 接受日期:2024-10-18 发布日期:2025-01-02
  • 通讯作者: A. V. Lysenko E-mail:o.lysenko@mss.sumdu.edu.ua

Influence of quasi-electrostatic support on amplification of space charge waves in amplification section of a superheterodyne free electron laser

A. V. Lysenko† and S. S. Ilin   

  1. Sumy State University, 116, Kharkivska st., 40007 Sumy, Ukraine
  • Received:2024-06-22 Revised:2024-10-01 Accepted:2024-10-18 Published:2025-01-02
  • Contact: A. V. Lysenko E-mail:o.lysenko@mss.sumdu.edu.ua

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摘要： A theoretical study of the influence of a quasi-electrostatic support on the amplification level of the slow space charge wave (SCW) in the amplification section of a superheterodyne free electron laser (FEL) was carried out. One of the ways to significantly increase the saturation level of the slow SCW is maintaining the conditions of a three-wave parametric resonance between the slow, fast SCWs and the resulting pump electric field. This can be done by introducing the quasi-electrostatic support in the superheterodyne FEL amplification section. Also, it was found that the generated pump electric field significantly influences the maintenance of parametric resonance conditions. As a result, this increases the saturation level of the slow SCW by 70%. Finally, the quasi-electrostatic support significantly reduces the maximum value of the electrostatic undulator pump field strength, which is necessary to achieve the maximum saturation level of the slow SCW.

关键词: superheterodyne free-electron lasers, space charge waves, electrostatic undulator, quasi-electrostatic support

Abstract: A theoretical study of the influence of a quasi-electrostatic support on the amplification level of the slow space charge wave (SCW) in the amplification section of a superheterodyne free electron laser (FEL) was carried out. One of the ways to significantly increase the saturation level of the slow SCW is maintaining the conditions of a three-wave parametric resonance between the slow, fast SCWs and the resulting pump electric field. This can be done by introducing the quasi-electrostatic support in the superheterodyne FEL amplification section. Also, it was found that the generated pump electric field significantly influences the maintenance of parametric resonance conditions. As a result, this increases the saturation level of the slow SCW by 70%. Finally, the quasi-electrostatic support significantly reduces the maximum value of the electrostatic undulator pump field strength, which is necessary to achieve the maximum saturation level of the slow SCW.

Key words: superheterodyne free-electron lasers, space charge waves, electrostatic undulator, quasi-electrostatic support

中图分类号:  (Free-electron lasers)

  • 41.60.Cr
52.59.Ye (Plasma devices for generation of coherent radiation ?)