FEL2015 - List of Authors (Zhang, W.Q.)

Paper

Title

Page

Operating of SXFEL in a Single Stage High Gain Harmonic Generation Scheme

29

G.L. Wang, D.X. Dai, G.R. Wu, X.M. Yang, W.Q. Zhang
DICP, Dalian, People's Republic of China

The beam energy spread at the entrance of undulator system is of paramount importance for efficient density modulation in high-gain seeded free-electron lasers (FELs). In this paper, the dependencies of high harmonic bunching efficiency in the high-gain harmonic generation (HGHG) schemes on the electron energy spread distribution are studied. Theoretical investigations and multi-dimensional 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 performance of HGHG-FELs. A numerical example demonstrates that, with the saddle distribution of sliced beam energy spread controlled by a laser heater, the 30th harmonic radiation can be directly generated by a single-stage seeding scheme for a soft x-ray FEL facility.

Slides MOC04 [3.345 MB]

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WEA02

Status of SXFEL and DCLS

B. Liu, J.H. Chen, J.H. Chen, J. Chen, Z.H. Chen, H.X. Deng, J.G. Ding, G.P. Fang, W. Fang, M. Gu, Q. Gu, X. Hu, D. Huang, M.M. Huang, Y.B. Leng, B. Li, G.Q. Lin, Y. Liu, S. Sun, D. Wang, G. Wang, L. Wang, L. Yin, L.Y. Yu, M. Zhang, W. Zhang, Z.T. Zhao, S.P. Zhong, Q.G. Zhou
SINAP, Shanghai, People's Republic of China
D.X. Dai, G.R. Wu, X.M. Yang, W.Q. Zhang
DICP, Dalian, People's Republic of China
Y.-C. Du, W.-H. Huang
TUB, Beijing, People's Republic of China

Shanghai Soft X-ray Free-Electron Laser test facility (SXFEL) and Dalian Coherent Light Source (DCLS) and are two main ongoing FEL projects in mainland China, and the design, construction and commissioning will be carried out by Shanghai Institute of Applied Physics. Introduction to these two projects, including background, parameters, design and current status will be presented.

Slides WEA02 [15.344 MB]

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Paper	Title	Page
MOC04	Operating of SXFEL in a Single Stage High Gain Harmonic Generation Scheme	29
	G.L. Wang, D.X. Dai, G.R. Wu, X.M. Yang, W.Q. Zhang DICP, Dalian, People's Republic of China
	The beam energy spread at the entrance of undulator system is of paramount importance for efficient density modulation in high-gain seeded free-electron lasers (FELs). In this paper, the dependencies of high harmonic bunching efficiency in the high-gain harmonic generation (HGHG) schemes on the electron energy spread distribution are studied. Theoretical investigations and multi-dimensional 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 performance of HGHG-FELs. A numerical example demonstrates that, with the saddle distribution of sliced beam energy spread controlled by a laser heater, the 30th harmonic radiation can be directly generated by a single-stage seeding scheme for a soft x-ray FEL facility.
	Slides MOC04 [3.345 MB]
Export •	reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

WEA02	Status of SXFEL and DCLS
	B. Liu, J.H. Chen, J.H. Chen, J. Chen, Z.H. Chen, H.X. Deng, J.G. Ding, G.P. Fang, W. Fang, M. Gu, Q. Gu, X. Hu, D. Huang, M.M. Huang, Y.B. Leng, B. Li, G.Q. Lin, Y. Liu, S. Sun, D. Wang, G. Wang, L. Wang, L. Yin, L.Y. Yu, M. Zhang, W. Zhang, Z.T. Zhao, S.P. Zhong, Q.G. Zhou SINAP, Shanghai, People's Republic of China D.X. Dai, G.R. Wu, X.M. Yang, W.Q. Zhang DICP, Dalian, People's Republic of China Y.-C. Du, W.-H. Huang TUB, Beijing, People's Republic of China
	Shanghai Soft X-ray Free-Electron Laser test facility (SXFEL) and Dalian Coherent Light Source (DCLS) and are two main ongoing FEL projects in mainland China, and the design, construction and commissioning will be carried out by Shanghai Institute of Applied Physics. Introduction to these two projects, including background, parameters, design and current status will be presented.
	Slides WEA02 [15.344 MB]
Export •	reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)