Generation of large-bandwidth x-ray free electron laser with evolutionary many-objective optimization algorithm

doi:10.1103/PhysRevAccelBeams.22.020703

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Generation of large-bandwidth x-ray free electron laser with evolutionary many-objective optimization algorithm
	Yan, JW ; Deng, HX
刊名	PHYSICAL REVIEW ACCELERATORS AND BEAMS
	2019
卷号	22 期号:2 页码:—
关键词	NONDOMINATED SORTING APPROACH NSGA-III OPERATION GRADIENT PULSES
ISSN号	2469-9888
DOI	10.1103/PhysRevAccelBeams.22.020703
文献子类	期刊论文
英文摘要	X-ray free-electron lasers (XFELs) are cutting-edge scientific instruments for a wide range of disciplines. Conventionally, the narrow bandwidth is pursued in an XFEL. However, in recent years, the large-bandwidth XFEL operation schemes are proposed for x-ray spectroscopy and x-ray crystallography, in which overcompression is a promising scheme to produce broad-bandwidth XFEL pulses through increasing the electron beam energy chirp. In this paper, combining with the beam yaw correction to overcome the transverse slice misalignment caused by the coherent synchrotron radiation, finding out the overcompression working point of the linac is treated as a many-objective (having four or more objectives) optimization problem, thus the nondominated sorting genetic algorithm III (NSGA-III) is applied to the beam dynamic optimization for the first time. Start-to-end simulations demonstrate a full bandwidth of 4.79% for Shanghai soft x-ray free-electron laser user facility. Furthermore, the NSGA-III is found to be very efficient by providing a set of reference points with preferences. This paves the way for applying this algorithm to online optimization of a real machine.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31645]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China
推荐引用方式 GB/T 7714	Yan, JW,Deng, HX. Generation of large-bandwidth x-ray free electron laser with evolutionary many-objective optimization algorithm[J]. PHYSICAL REVIEW ACCELERATORS AND BEAMS,2019,22(2):—.
APA	Yan, JW,&Deng, HX.(2019).Generation of large-bandwidth x-ray free electron laser with evolutionary many-objective optimization algorithm.PHYSICAL REVIEW ACCELERATORS AND BEAMS,22(2),—.
MLA	Yan, JW,et al."Generation of large-bandwidth x-ray free electron laser with evolutionary many-objective optimization algorithm".PHYSICAL REVIEW ACCELERATORS AND BEAMS 22.2(2019):—.