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
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
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)