High Power Laser and Particle Beams, Volume. 34, Issue 9, 094002(2022)

Influence of energy spread on the transverse profile of the focused electron beam

Ke Wang, Zhiyong Dai, Liansheng Xia, Huang Zhang, Jin Li, Peiliang Fan, and Zhiyong Yang*
Author Affiliations
  • Institute of Fluid Physics, CAEP, P. O. Box 919-108, Mianyang 621900, China
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    A brief introduction to evaluating the beam size with the Root-Mean-Square (RMS) value, the full-width-half-maximum (FWHM) value and the modulation-transfer-function (MTF) value is given in this paper. The focusing of the long pulse electron beam (~100 ns) in an induction linear accelerator is studied by both theoretical analysis and numerical simulation, the contribution of the energy and current difference of the rising edge and the falling edge to the final beam size are discussed. In our results, the rising edge and the falling edge of the beam with large energy deviation may lead to a significant increase of the beam size, especially the MTF beam size, i.e. the FWHM beam size is increased by about 9% while the MTF beam size is increased by about 24%.

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    Ke Wang, Zhiyong Dai, Liansheng Xia, Huang Zhang, Jin Li, Peiliang Fan, Zhiyong Yang. Influence of energy spread on the transverse profile of the focused electron beam[J]. High Power Laser and Particle Beams, 2022, 34(9): 094002

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    Paper Information

    Category: High Current Accelerator and Particle Beams Technology

    Received: Oct. 24, 2021

    Accepted: Apr. 19, 2022

    Published Online: Aug. 17, 2022

    The Author Email: Yang Zhiyong (fantasy13089@163.com)

    DOI:10.11884/HPLPB202234.210450

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