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

Wang Ke; Dai Zhiyong; Xia Liansheng; Zhang Huang; Li Jin; Fan Peiliang; Yang Zhiyong

doi:10.11884/HPLPB202234.210450

Volume 34 Issue 9

Jun. 2022

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Wang Ke, Dai Zhiyong, Xia Liansheng, et al. Influence of energy spread on the transverse profile of the focused electron beam[J]. High Power Laser and Particle Beams, 2022, 34: 094002. doi: 10.11884/HPLPB202234.210450

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Wang Ke, Dai Zhiyong, Xia Liansheng, et al. Influence of energy spread on the transverse profile of the focused electron beam[J]. High Power Laser and Particle Beams, 2022, 34: 094002. doi: 10.11884/HPLPB202234.210450

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

doi: 10.11884/HPLPB202234.210450

Institute of Fluid Physics, CAEP, P. O. Box 919-108, Mianyang 621900, China

Received Date: 2021-10-24
Accepted Date: 2022-04-19
Rev Recd Date: 2022-04-02

Available Online: 2022-04-21

Publish Date: 2022-06-17

Abstract

Abstract

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%.
- linear induction accelerator,
- bunch size,
- energy spread,
- beam slice

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References(12)

References

[1]	邓建军, 丁伯南, 王华岑, 等. “神龙一号”直线感应加速器物理设计[J]. 强激光与粒子束, 2003, 15(5):502-504. (Deng Jianjun, Ding Bo’nan, Wang Huacen, et al. Physical design of the Dragon-I linear induction accelerator[J]. High Power Laser and Particle Beams, 2003, 15(5): 502-504 Deng Jianjun, Ding Bonan, Wang Huacen, et al. Physical design of the Dragon-I Linear induction accelerator[J]. High Power Laser and Particle Beams, 2003, 15(5): 502-504
[2]	Klasky M L. Physics based radiography[R]. LA-CP-18-00890, 2018.
[3]	石金水, 邓建军, 章林文, 等. 神龙二号加速器及其关键技术[J]. 强激光与粒子束, 2016, 28:010201. (Shi Jinshui, Deng Jianjun, Zhang Linwen, et al. Dragon-II accelerator and its key technology[J]. High Power Laser and Particle Beams, 2016, 28: 010201 doi: 10.11884/HPLPB201628.010201 Shi Jinshui, Deng Jianjun, Zhang Linwen, et al. Dragon-II accelerator and its key technology[J]. High Power Laser and Particle Beams, 2016, 28: 010201 doi: 10.11884/HPLPB201628.010201
[4]	Ekdahl C. Electron-beam dynamics for an advanced flash-radiography accelerator[J]. IEEE Transactions on Plasma Science, 2015, 43(12): 4123-4129. doi: 10.1109/TPS.2015.2496499
[5]	施将君. 高能闪光照相引论[M]. 绵阳: 中物院流体物理研究所科协, 1998 Shi Jiangjun. Introduction of high-energy flash radiography[M]. Mianyang: Scientific Book Series of IFP, 1998
[6]	Klasky M L. A correct flat field model for DARHT[R]. LA-UR-19-29164, 2019.
[7]	王毅, 李勤, 刘云龙, 等. 用于直线感应加速器光源焦斑测量的双锥厚针孔结构设计[J]. 强激光与粒子束, 2019, 31:065102. (Wang Yi, Li Qin, Liu Yunlong, et al. Structure design of thick pinhole with double cones for spot size measurement of the linear induction accelerator light source[J]. High Power Laser and Particle Beams, 2019, 31: 065102 doi: 10.11884/HPLPB201931.180291 Wang Yi, Li Qin, Liu Yunlong, et al. Structure design of thick pinhole with double cones for spot size measurement of the linear induction accelerator light source[J]. High Power Laser and Particle Beams, 2019, 31: 065102 doi: 10.11884/HPLPB201931.180291
[8]	Wu Yuanhui, Chen Y J. ENSOLVE: A simulation code for FXR LIA downstream section[C]//Proceedings of the 9th International Particle Accelerator Conference. 2018: 2271-2273.
[9]	Ekdahl C. Characterizing flash-radiography source spots[J]. Journal of the Optical Society of America A, 2011, 28(12): 2501-2509. doi: 10.1364/JOSAA.28.002501
[10]	王毅, 李勤, 代志勇. 蒙特卡罗模拟分析电子束发射度对照射量空间分布影响[J]. 强激光与粒子束, 2017, 29:065006. (Wang Yi, Li Qin, Dai Zhiyong. Analysis on influence of beam emittance on spatial distribution of exposure using Monte Carlo simulation[J]. High Power Laser and Particle Beams, 2017, 29: 065006 doi: 10.11884/HPLPB201729.170029 Wang Yi, Li Qin, Dai Zhiyong. Analysis on influence of beam emittance on spatial distribution of exposure using Monte Carlo simulation[J]. High Power Laser and Particle Beams, 2017, 29: 065006 doi: 10.11884/HPLPB201729.170029
[11]	Pöplau G, van Rienen U, Flöettmann K. 3D space charge calculations for bunches in the tracking code Astra[C]//Proceedings of EPAC. 2006: 2203-2205.
[12]	Zhu Jun. Design study for generating sub-femtosecond to femtosecond electron bunches for advanced accelerator development at SINBAD[D]. Hamburg: Universität Hamburg, 2017.