中国物理B ›› 2007, Vol. 16 ›› Issue (1): 88-94.doi: 10.1088/1009-1963/16/1/016

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Influence of spatiotemporal coupling on the capture-and-acceleration-scenario vacuum electron acceleration by ultrashort pulsed laser beam

陆大全, 钱列加, 李永忠, 范滇元   

  1. Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
  • 收稿日期:2005-08-12 修回日期:2006-06-12 出版日期:2007-02-01 发布日期:2007-02-01
  • 基金资助:
    Project supported by the Natural Science Foundation of China (Grant Nos 60538010, 10335030 and 10376009), the Science and Technology Commission of Shanghai, China (Grant Nos 05JC14005 and 05SG02), and the Graduate Science and Technology Innovation Foundat

Influence of spatiotemporal coupling on the capture-and-acceleration-scenario vacuum electron acceleration by ultrashort pulsed laser beam

Lu Da-Quan(陆大全), Qian Lie-Jia(钱列加)†, Li Yong-Zhong(李永忠), and Fan Dian-Yuan(范滇元)   

  1. Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
  • Received:2005-08-12 Revised:2006-06-12 Online:2007-02-01 Published:2007-02-01
  • Supported by:
    Project supported by the Natural Science Foundation of China (Grant Nos 60538010, 10335030 and 10376009), the Science and Technology Commission of Shanghai, China (Grant Nos 05JC14005 and 05SG02), and the Graduate Science and Technology Innovation Foundat

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摘要： This paper investigates the properties of the ultrashort pulsed beam aimed to the capture-and-acceleration-scenario (CAS) vacuum electron acceleration. The result shows that the spatiotemporal distribution of the phase velocity, the longitudinal component of the electric field and the acceleration quality factor are qualitatively similar to that of the continuous-wave Gaussian beam, and are slightly influenced by the spatiotemporal coupling of the ultrashort pulsed beam. When the pulse is compressed to an ultrashort one in which the pulse duration TFWHM <5T0, the variation of the maximum net energy gain due to the carrier-envelope phase is a crucial disadvantage in the CAS acceleration process.

关键词: vacuum electron acceleration, ultrashort pulsed beam

Abstract: This paper investigates the properties of the ultrashort pulsed beam aimed to the capture-and-acceleration-scenario (CAS) vacuum electron acceleration. The result shows that the spatiotemporal distribution of the phase velocity, the longitudinal component of the electric field and the acceleration quality factor are qualitatively similar to that of the continuous-wave Gaussian beam, and are slightly influenced by the spatiotemporal coupling of the ultrashort pulsed beam. When the pulse is compressed to an ultrashort one in which the pulse duration TFWHM <5 T0, the variation of the maximum net energy gain due to the carrier-envelope phase is a crucial disadvantage in the CAS acceleration process.

Key words: vacuum electron acceleration, ultrashort pulsed beam

中图分类号:  (Beam characteristics: profile, intensity, and power; spatial pattern formation)

  • 42.60.Jf
42.60.Fc (Modulation, tuning, and mode locking) 42.60.Pk (Continuous operation) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)