Beam energy distribution influences on density modulation efficiency in seeded free-electron lasers

	Beam energy distribution influences on density modulation efficiency in seeded free-electron lasers
	Wang, Guanglei 1; Zhang, Weiqing 1; Wu, Guorong 1; Dai, Dongxu 1; Yang, Xueming 1; Feng, Chao 2; Zhang, Meng 2; Deng, Haixiao 2; Wang, Dong 2; Zhao, Zhentang 2
刊名	physical review special topics-accelerators and beams
	2015-06-04
卷号	18 期号:6 页码:060701
通讯作者	杨学明 ; 邓海啸
英文摘要	the beam energy spread at the entrance of an undulator system is of paramount importance for efficient density modulation in high-gain seeded free-electron lasers (fels). in this paper, the dependences of high harmonic bunching efficiency in high-gain harmonic generation (hghg), echo-enabled harmonic generation (eehg) and phase-merging enhanced harmonic generation (pehg) schemes on the electron beam energy spread distribution are studied. theoretical investigations and multidimensional numerical simulations are applied to the cases of uniform and saddle beam energy distributions and compared to a traditional gaussian distribution. it shows that the uniform and saddle electron energy distributions significantly enhance the bunching performance of hghg fels, while they almost have no influence on eehg and pehg schemes. a further start-to-end simulation example demonstrated that, with the saddle distribution of sliced beam energy spread controlled by a laser heater, the 30th harmonic can be directly generated by a single-stage hghg scheme for a soft x-ray fel facility.
学科主题	物理化学
WOS标题词	science & technology ; physical sciences
类目[WOS]	physics, nuclear ; physics, particles & fields
研究领域[WOS]	physics
关键词[WOS]	gain harmonic-generation ; simulation ; coherent ; fel
收录类别	SCI
语种	英语
WOS记录号	WOS:000355624500001
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/143721]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Wang, Guanglei,Zhang, Weiqing,Wu, Guorong,et al. Beam energy distribution influences on density modulation efficiency in seeded free-electron lasers[J]. physical review special topics-accelerators and beams,2015,18(6):060701.
APA	Wang, Guanglei.,Zhang, Weiqing.,Wu, Guorong.,Dai, Dongxu.,Yang, Xueming.,...&Zhao, Zhentang.(2015).Beam energy distribution influences on density modulation efficiency in seeded free-electron lasers.physical review special topics-accelerators and beams,18(6),060701.
MLA	Wang, Guanglei,et al."Beam energy distribution influences on density modulation efficiency in seeded free-electron lasers".physical review special topics-accelerators and beams 18.6(2015):060701.