Purified self-amplified spontaneous emission free-electron lasers with slippage-boosted filtering

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	Purified self-amplified spontaneous emission free-electron lasers with slippage-boosted filtering
	Xiang, Dao ; Ding, Yuantao ; Huang, Zhirong ; Deng, Haixiao
刊名	PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
	2013
卷号	16 期号:1
ISSN号	1098-4402
英文摘要	We propose a simple method to significantly enhance the temporal coherence and spectral brightness of a self-amplified spontaneous emission (SASE) free-electron laser (FEL). In this purified SASE (pSASE) FEL, a few undulator sections (called slippage-boosted sections) resonant at a subharmonic of the FEL radiation are used in the middle stage of the exponential growth regime to amplify the radiation while simultaneously reducing the FEL bandwidth. In this slippage-boosted section, the average longitudinal velocity of electrons is reduced, which effectively increases the FEL slippage length that allows the radiation fields initially far apart to create a phase relation, leading to n times increase in FEL cooperation length, where n is the ratio of the resonant wavelength of the slippage-boosted section to that of the original FEL radiation. The purified radiation, as a seed with improved temporal coherence, is further amplified to saturation in the undulator sections tuned to the FEL wavelength. Using the linac coherent light source II (LCLS-II) parameters as an example, we show that with the proposed configuration the temporal coherence and spectral brightness of a SASE FEL can be significantly enhanced. This scheme may be applied to many SASE FEL light sources to enhance the FEL performance. DOI: 10.1103/PhysRevSTAB.16.010703
收录类别	SCI
语种	英语
WOS记录号	WOS:000313954000002
公开日期	2014-06-13
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/13875]
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
推荐引用方式 GB/T 7714	Xiang, Dao,Ding, Yuantao,Huang, Zhirong,et al. Purified self-amplified spontaneous emission free-electron lasers with slippage-boosted filtering[J]. PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS,2013,16(1).
APA	Xiang, Dao,Ding, Yuantao,Huang, Zhirong,&Deng, Haixiao.(2013).Purified self-amplified spontaneous emission free-electron lasers with slippage-boosted filtering.PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS,16(1).
MLA	Xiang, Dao,et al."Purified self-amplified spontaneous emission free-electron lasers with slippage-boosted filtering".PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS 16.1(2013).