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Eliminating the microbunching-instability-induced sideband in a soft x-ray self-seeding free-electron laser
Zhang, KQ; Zeng, L; Qi, Z; Feng, C; Wang, D
2018
Source PublicationNUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN0168-9002
Volume882Pages:22-29
Subtype期刊论文
AbstractSoft x-ray self-seeding has been proved to be a feasible method to improve the longitudinal coherence of high gain free-electron laser. However, a pedestal-like sideband in the spectrum has been observed in the experiment, which generally limits the purity of the radiation pulse and the user's application. The previous theoretical study indicates that the pedestal-like sideband is mainly induced by microbunching instability generated from LINAC. In this paper, three dimensional simulations have been performed to confirm the analytical results and show the formation process of the spectral sideband. A probable method is proposed to eliminate the pedestal-like sideband by simply inserting a magnetic chicane before the self-seeding FEL undulator. Theoretical and numerical simulations have been performed and the results show that the proposed method can efficiently eliminate the microbunching-instability-induced sideband in a soft x-ray self-seeding FEL. (C) 2017 Elsevier B.V. All rights reserved.
KeywordGeneration Emission
DOI10.1016/j.nima.2017.10.060
Indexed BySCI
Language英语
WOS IDWOS:000418526200004
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28999
Collection中科院上海应用物理研究所2011-2018年
Affiliation1.Zhang, KQ
2.Zeng, L
3.Qi, Z
4.Feng, C
5.Wang, D
Recommended Citation
GB/T 7714
Zhang, KQ,Zeng, L,Qi, Z,et al. Eliminating the microbunching-instability-induced sideband in a soft x-ray self-seeding free-electron laser[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2018,882:22-29.
APA Zhang, KQ,Zeng, L,Qi, Z,Feng, C,&Wang, D.(2018).Eliminating the microbunching-instability-induced sideband in a soft x-ray self-seeding free-electron laser.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,882,22-29.
MLA Zhang, KQ,et al."Eliminating the microbunching-instability-induced sideband in a soft x-ray self-seeding free-electron laser".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 882(2018):22-29.
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