High Power Laser and Particle Beams, Volume. 34, Issue 4, 049002(2022)

Predicting relative energy spread in two-bunch plasma wakefield acceleration

Xiaoning Wang1,2, Jie Gao1,2, Weiming An3、*, Jia Wang1,2, Dazhang Li1,2、*, Ming Zeng1,2, and Wei Lu4
Author Affiliations
  • 1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Department of Astronomy, Beijing Normal University, Beijing 100875, China
  • 4Department of Engineering Physics, Tsinghua University, Beijing 100084, China
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    We present a formula to directly obtain the final relative energy spread of a trailing beam at the maximal acceleration distance. The formula works for electron beams in a two-bunch plasma wakefield acceleration stage in the so-called nonlinear bubble regime. It only requires the longitudinal profile of the trailing beam and the longitudinal wakefield within the trailing beam at the beginning of an acceleration. This formula not only works well for drive beams and trailing beams with the same initial energies, but is also available for those beams with different initial energies. We find that the relative energy spread of the trailing beam obtained from the formula is determined by the ratio of the trailing beam’s initial energy to the drive beam’s initial energy rather than the specific value of their initial energies. We perform several computational simulations using the quasi-static particle-in-cell code QuickPIC, and the results agree well with that calculated from the formula.

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    Xiaoning Wang, Jie Gao, Weiming An, Jia Wang, Dazhang Li, Ming Zeng, Wei Lu. Predicting relative energy spread in two-bunch plasma wakefield acceleration[J]. High Power Laser and Particle Beams, 2022, 34(4): 049002

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    Paper Information

    Category: Advanced Interdisciplinary Science

    Received: Oct. 10, 2021

    Accepted: Jan. 6, 2022

    Published Online: Apr. 12, 2022

    The Author Email: Weiming An (anweiming@bnu.edu.cn), Dazhang Li (lidz@ihep.ac.cn)

    DOI:10.11884/HPLPB202234.210425

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