中国物理B ›› 2012, Vol. 21 ›› Issue (5): 54103-054103.doi: 10.1088/1674-1056/21/5/054103

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Investigation of intense sheet electron beam transport using the macroscopic cold-fluid model and the single-particle orbit theory

韩莹1 2,阮存军1   

  1. a. Key Laboratory of High Power Microwave Sources and Technologies, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    b. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
  • 收稿日期:2011-04-28 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60501019, 10775139 and 60971073).

Investigation of intense sheet electron beam transport using the macroscopic cold-fluid model and the single-particle orbit theory

Han Ying(韩莹)a)b)† and Ruan Cun-Jun(阮存军)a)   

  1. a. Key Laboratory of High Power Microwave Sources and Technologies, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    b. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2011-04-28 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60501019, 10775139 and 60971073).

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摘要： The focusing and the stable transport of an intense elliptic sheet electron beam in a uniform magnetic field are investigated thoroughly by using the macroscopic cold-fluid model and the single-particle orbit theory. The results indicate that the envelopes and the tilted angles of the sheet electron beam obtained by the two theories are consistent. The single-particle orbit theory is more accurate due to its treatment of the space-charge fields in a rectangular drift tube. The macroscopic cold-fluid model describes the collective transport process in order to provide detailed information about the beam dynamics, such as beam shape, density, and velocity profile. The tilt of the elliptic sheet beam in a uniform magnetic field is carefully studied and demonstrated. The results presented in this paper provide two complete theories for systemically discussing the transport of the sheet beam and are useful for understanding and guiding the practical engineering design of electron optics systems in high power vacuum electronic devices.

关键词: focusing and transport, macroscopic cold-fluid model, sheet electron beam, single-particle orbit theory

Abstract: The focusing and the stable transport of an intense elliptic sheet electron beam in a uniform magnetic field are investigated thoroughly by using the macroscopic cold-fluid model and the single-particle orbit theory. The results indicate that the envelopes and the tilted angles of the sheet electron beam obtained by the two theories are consistent. The single-particle orbit theory is more accurate due to its treatment of the space-charge fields in a rectangular drift tube. The macroscopic cold-fluid model describes the collective transport process in order to provide detailed information about the beam dynamics, such as beam shape, density, and velocity profile. The tilt of the elliptic sheet beam in a uniform magnetic field is carefully studied and demonstrated. The results presented in this paper provide two complete theories for systemically discussing the transport of the sheet beam and are useful for understanding and guiding the practical engineering design of electron optics systems in high power vacuum electronic devices.

Key words: focusing and transport, macroscopic cold-fluid model, sheet electron beam, single-particle orbit theory

中图分类号:  (Charged-particle beams)

  • 41.75.-i
41.85.-p (Beam optics) 41.85.Ja (Particle beam transport) 41.90.+e (Other topics in electromagnetism; electron and ion optics)