Transverse to longitudinal phase space coupling in an electron beam for suppression of microbunching instability
Huang, DZ; Feng, C; Deng, HX; Gu, Q; Zhao, ZT; Feng, C (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
2016
发表期刊PHYSICAL REVIEW ACCELERATORS AND BEAMS
ISSN2469-9888
卷号19期号:10页码:-
文章类型期刊论文
摘要The microbunching instability developed during the beam compression process in the linear accelerator (LINAC) of a free-electron laser (FEL) facility has always been a problem that degrades the lasing performance, and even no FEL is able to be produced if the beam quality is destroyed too much by the instability. A common way to suppress the microbunching instability is to introduce extra uncorrelated energy spread by the laser heater that heats the beam through the interaction between the electron and laser beam, as what has been successfully implemented in the Linac Coherent Light Source and Fermi@Elettra. In this paper, a simple and effective scheme is proposed to suppress the microbunching instability by adding two transverse gradient undulators (TGU) before and after the magnetic bunch compressor. The additional uncorrelated energy spread and the density mixing from the transverse spread brought up by the first TGU results in significant suppression of the instability. Meanwhile, the extra slice energy spread and the transverse emittance can also be effectively recovered by the second TGU. The magnitude of the suppression can be easily controlled by varying the strength of the magnetic fields of the TGUs. Theoretical analysis and numerical simulations demonstrate the capability of the proposed technique in the LINAC of an x-ray free-electron laser facility.
DOI10.1103/PhysRevAccelBeams.19.100701
收录类别SCI
语种英语
WOS记录号WOS:000384480400001
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/26668
专题中科院上海应用物理研究所2011-2018年
通讯作者Feng, C (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
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Huang, DZ,Feng, C,Deng, HX,et al. Transverse to longitudinal phase space coupling in an electron beam for suppression of microbunching instability[J]. PHYSICAL REVIEW ACCELERATORS AND BEAMS,2016,19(10):-.
APA Huang, DZ,Feng, C,Deng, HX,Gu, Q,Zhao, ZT,&Feng, C .(2016).Transverse to longitudinal phase space coupling in an electron beam for suppression of microbunching instability.PHYSICAL REVIEW ACCELERATORS AND BEAMS,19(10),-.
MLA Huang, DZ,et al."Transverse to longitudinal phase space coupling in an electron beam for suppression of microbunching instability".PHYSICAL REVIEW ACCELERATORS AND BEAMS 19.10(2016):-.
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