FEL2014 - List of Authors (Wang, D.)

Paper

Title

Page

Design Study for the PEHG Experiment at SDUV-FEL

219

C. Feng, H.X. Deng, B. Liu, D. Wang, X.T. Wang, M. Zhang, T. Zhang, W. Zhang, Z.T. Zhao
SINAP, Shanghai, People's Republic of China

Funding: This work was partially supported by National Natural Science Foundation of China (11475250, 11175240 and 11205234)
In this paper, design studies for the proof-of-principle experiment of the recently proposed phase-merging enhanced harmonic generation (PEHG) mechanism are presented. A dogleg and a new designed transverse gradient undulator should be added in the undulator system of SDUV-FEL to perform the phase-merging effect. With the help of 3D simulation codes, we show the possible performance of PEHG with the realistic parameters of SDUV-FEL.
* H. Deng, C. Feng, Phys. Rev. Lett. 111, 084801.
** C. Feng, H. Deng, D. Wang, Z. Zhao, New J. Phys.,16, 043021.
*** C. Feng, T. Zhang, H. Deng, Z. Zhao, Phys. Rev. ST Accel. Beams 17, 070701.

MOP072

Preparation for the CPA-CHG Experiment at SDUV-FEL

C. Feng, H.X. Deng, T. Lan, B. Li, B. Liu, D. Wang, X.T. Wang, Z.T. Zhao
SINAP, Shanghai, People's Republic of China

Chirped pulse amplification has been shown theoretically possible to generate ultra-short high intensity radiation pulses in a seeded FEL. To demonstrate the theoretical predictions, a CPA-CHG experiment is under preparation based on the SDUV-FEL recently. We will show the experiment layout, optical design studies and some preliminary measurement results of the optical systems in this paper.
* L. Yu, E. Johnson, D. Li, D. Umstader, Physical Review E 49 (1994) 4480
** C. Feng et al. Nuclear Instruments and Methods in Physics Research A 712 (2013) 113

TUC04

Experimental Demonstration of Seeded Free-electron Laser Spectrum Control using Corrugated Structure

H.X. Deng, C. Feng, B. Liu, D. Wang, M. Zhang, T. Zhang, Z.T. Zhao
SINAP, Shanghai, People's Republic of China

Funding: This work was partially supported by the Major State Basic Research Development Program of China (2011CB808300) and the National Natural Science Foundation of China (11175240, 11205234 and 11322550).
Corrugated structures [*] hold promising prospects as beam linearizer, beam de-chirper and beam stabilizer for a high brightness LINAC, and thus enhance the FEL performance significantly. So far, several electron beam test experiments of corrugated structure have been carried out on LINACs at PAL [**] and BNL [***]. More recently, a passive control experiment of FEL spectrum, by using a pair of corrugated planes has been successfully accmoplished at SDUV-FEL, which is the first real FEL experimental demonstration of such wakefield structure applications. The physical design, numerical simulations, the vacuum chamber manufacture and the experiment results are presented in this paper.
* K. L. F. Bane and G. Stupakov, NIMA 690 (2012) 106-110.
** P. Emma, M. Venturini, K. L. F. Bane, et al., PRL. 112 (2014) 034801.
*** M. Harrison, et al., NaPAc 2013, Pasadena, USA.

Slides TUC04 [8.562 MB]

THP095

Evolvement of the Laser and Synchronization System for the Shanghai DUV-FEL Test Facility

960

B. Liu, L. Feng, T. Lan, X.Q. Liu, D. Wang, X.T. Wang, W.Y. Zhang, S.P. Zhong
SINAP, Shanghai, People's Republic of China

Funding: supported by the National Natural Science Foundation of China (Grant No. 11175241)
Many attractive experiments including HGHG, EEHG, cascaded HGHG, chirped pulse amplification etc. are carried out or planned on the Shanghai Deep Ultra-Violet Free Electron Laser test facility. These experiments are all utilizing a laser as seed, and need precise synchronization between the electron beam and the laser pulse. We will describe the history and current status of the seeding and synchronization scheme for the SDUV-FEL together with some related experiment results in this paper.

FRB01

Phase-merging Enhanced Harmonic Generation for Seeded Free-electron Lasers

H.X. Deng, C. Feng, D. Wang, Z.T. Zhao
SINAP, Shanghai, People's Republic of China

Funding: This work was partially supported by the Major State Basic Research Development Program of China (2011CB808300) and the National Natural Science Foundation of China (11175240, 11205234, and 11322550)
The recently proposed phase-merging enhanced harmonic generation (PEHG) mechanism [*, **] holds promising prospect for seeded free-electron lasers (FEL) in short-wavelength. A remarkable bunching efficiency at high harmonics can be accomplished by using PEHG mechanism. In this paper, the theoretical descriptions and numerical simulations of PEHG will be presented, including the more recent theoretical progresses and a potential proof-of-principle experiment at Shanghai deep ultraviolet FEL test facility.
* Haixiao Deng, Chao Feng, Phys. Rev. Lett. 111 (2013) 084801.
** Chao Feng, Haixiao Deng, Dong Wang, Zhentang Zhao, New Journal of Physics,16 (2014) 043021.

Slides FRB01 [29.808 MB]

Paper	Title	Page
MOP070	Design Study for the PEHG Experiment at SDUV-FEL	219
	C. Feng, H.X. Deng, B. Liu, D. Wang, X.T. Wang, M. Zhang, T. Zhang, W. Zhang, Z.T. Zhao SINAP, Shanghai, People's Republic of China
	Funding: This work was partially supported by National Natural Science Foundation of China (11475250, 11175240 and 11205234) In this paper, design studies for the proof-of-principle experiment of the recently proposed phase-merging enhanced harmonic generation (PEHG) mechanism are presented. A dogleg and a new designed transverse gradient undulator should be added in the undulator system of SDUV-FEL to perform the phase-merging effect. With the help of 3D simulation codes, we show the possible performance of PEHG with the realistic parameters of SDUV-FEL. * H. Deng, C. Feng, Phys. Rev. Lett. 111, 084801. C. Feng, H. Deng, D. Wang, Z. Zhao, New J. Phys.,16, 043021. * C. Feng, T. Zhang, H. Deng, Z. Zhao, Phys. Rev. ST Accel. Beams 17, 070701.

MOP072	Preparation for the CPA-CHG Experiment at SDUV-FEL
	C. Feng, H.X. Deng, T. Lan, B. Li, B. Liu, D. Wang, X.T. Wang, Z.T. Zhao SINAP, Shanghai, People's Republic of China
	Chirped pulse amplification has been shown theoretically possible to generate ultra-short high intensity radiation pulses in a seeded FEL. To demonstrate the theoretical predictions, a CPA-CHG experiment is under preparation based on the SDUV-FEL recently. We will show the experiment layout, optical design studies and some preliminary measurement results of the optical systems in this paper. * L. Yu, E. Johnson, D. Li, D. Umstader, Physical Review E 49 (1994) 4480 ** C. Feng et al. Nuclear Instruments and Methods in Physics Research A 712 (2013) 113

TUC04	Experimental Demonstration of Seeded Free-electron Laser Spectrum Control using Corrugated Structure
	H.X. Deng, C. Feng, B. Liu, D. Wang, M. Zhang, T. Zhang, Z.T. Zhao SINAP, Shanghai, People's Republic of China
	Funding: This work was partially supported by the Major State Basic Research Development Program of China (2011CB808300) and the National Natural Science Foundation of China (11175240, 11205234 and 11322550). Corrugated structures [] hold promising prospects as beam linearizer, beam de-chirper and beam stabilizer for a high brightness LINAC, and thus enhance the FEL performance significantly. So far, several electron beam test experiments of corrugated structure have been carried out on LINACs at PAL [] and BNL [*]. More recently, a passive control experiment of FEL spectrum, by using a pair of corrugated planes has been successfully accmoplished at SDUV-FEL, which is the first real FEL experimental demonstration of such wakefield structure applications. The physical design, numerical simulations, the vacuum chamber manufacture and the experiment results are presented in this paper. K. L. F. Bane and G. Stupakov, NIMA 690 (2012) 106-110. P. Emma, M. Venturini, K. L. F. Bane, et al., PRL. 112 (2014) 034801. * M. Harrison, et al., NaPAc 2013, Pasadena, USA.
	Slides TUC04 [8.562 MB]

THP095	Evolvement of the Laser and Synchronization System for the Shanghai DUV-FEL Test Facility	960
	B. Liu, L. Feng, T. Lan, X.Q. Liu, D. Wang, X.T. Wang, W.Y. Zhang, S.P. Zhong SINAP, Shanghai, People's Republic of China
	Funding: supported by the National Natural Science Foundation of China (Grant No. 11175241) Many attractive experiments including HGHG, EEHG, cascaded HGHG, chirped pulse amplification etc. are carried out or planned on the Shanghai Deep Ultra-Violet Free Electron Laser test facility. These experiments are all utilizing a laser as seed, and need precise synchronization between the electron beam and the laser pulse. We will describe the history and current status of the seeding and synchronization scheme for the SDUV-FEL together with some related experiment results in this paper.

FRB01	Phase-merging Enhanced Harmonic Generation for Seeded Free-electron Lasers
	H.X. Deng, C. Feng, D. Wang, Z.T. Zhao SINAP, Shanghai, People's Republic of China
	Funding: This work was partially supported by the Major State Basic Research Development Program of China (2011CB808300) and the National Natural Science Foundation of China (11175240, 11205234, and 11322550) The recently proposed phase-merging enhanced harmonic generation (PEHG) mechanism [, ] holds promising prospect for seeded free-electron lasers (FEL) in short-wavelength. A remarkable bunching efficiency at high harmonics can be accomplished by using PEHG mechanism. In this paper, the theoretical descriptions and numerical simulations of PEHG will be presented, including the more recent theoretical progresses and a potential proof-of-principle experiment at Shanghai deep ultraviolet FEL test facility. Haixiao Deng, Chao Feng, Phys. Rev. Lett. 111 (2013) 084801. ** Chao Feng, Haixiao Deng, Dong Wang, Zhentang Zhao, New Journal of Physics,16 (2014) 043021.
	Slides FRB01 [29.808 MB]