Generating a uniform transverse distributed electronbeam along a beam line

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JIAO Yi and CUI Xiao-Hao. Generating a uniform transverse distributed electronbeam along a beam line[J]. Chinese Physics C, 2015, 39(11): 117001. doi: 10.1088/1674-1137/39/11/117001
JIAO Yi and CUI Xiao-Hao. Generating a uniform transverse distributed electronbeam along a beam line[J]. Chinese Physics C, 2015, 39(11): 117001.  doi: 10.1088/1674-1137/39/11/117001 shu
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Received: 2015-04-27
Revised: 2015-06-19
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    Supported by National Natural Science Foundation of China (11475202, 11405187) and Youth Innovation Promotion Association of Chinese Academy of Sciences (2015009)

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Generating a uniform transverse distributed electronbeam along a beam line

    Corresponding author: JIAO Yi,
  • 1. Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Supported by National Natural Science Foundation of China (11475202, 11405187) and Youth Innovation Promotion Association of Chinese Academy of Sciences (2015009)

Abstract: It has been reported that transverse distribution shaping can help to further enhance the energy extraction efficiency in a terawatt, tapered X-ray free-electron laser. Thus, methods of creating and keeping an almost uniform transverse distributed (UTD) beam within undulators are required. This study shows that a UTD electron beam can be generated within evenly distributed drift sections where undulators can be placed, by means of octupoles and particular optics. A specific design is presented, and numerical simulations are performed to verify the proposed method.

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