FEL2014 - List of Authors (Xiang, D.)

Paper

Title

Page

Phase Space Manipulations in Modern Accelerators

16

D. Xiang
Shanghai Jiao Tong University, Shanghai, People's Republic of China

Funding: This work was supported by the National Natural Science Foundation of China under Grants No. 11327902.
Beam manipulation is a process to rearrange beam's distribution in 6-D phase space. In many cases, a simple phase space manipulation may lead to significant enhancement in the performance of accelerator based facilities. In this paper, I will discuss various beam manipulation techniques for tailoring beam distribution in modern accelerators to meet the requirements of various applications. These techniques become a new focus of accelerator physics R&D and hold great promise in opening up new opportunities in accelerator based scientific facilities.

Slides MOB03 [5.078 MB]

MOC02

Correlated Energy Spread Removal with Space Charge for High Gain Harmonic Generation

E. Hemsing, G. Marcus, A. Marinelli
SLAC, Menlo Park, California, USA
D. Xiang
Shanghai Jiao Tong University, Shanghai, People's Republic of China

We study the effect of longitudinal space charge on the correlated energy spread of a relativistic beam that has been microbunched for the emission of coherent, high harmonic radiation. We show that, in the case of microbunching induced by a laser modulator followed by a dispersive chicane, longitudinal space charge forces can act to significantly reduce the induced energy spread of the beam without a reduction in the harmonic bunching content. This effect may be optimized to significantly increase the harmonic number achievable in seeded HGHG free electrons lasers, which are otherwise limited by the induced energy spread from the laser.
The work presented here has been published in Reference [1].
[1] E. Hemsing et al., to appear in Phys. Rev. Lett. (2014)

Slides MOC02 [4.092 MB]

Paper	Title	Page
MOB03	Phase Space Manipulations in Modern Accelerators	16
	D. Xiang Shanghai Jiao Tong University, Shanghai, People's Republic of China
	Funding: This work was supported by the National Natural Science Foundation of China under Grants No. 11327902. Beam manipulation is a process to rearrange beam's distribution in 6-D phase space. In many cases, a simple phase space manipulation may lead to significant enhancement in the performance of accelerator based facilities. In this paper, I will discuss various beam manipulation techniques for tailoring beam distribution in modern accelerators to meet the requirements of various applications. These techniques become a new focus of accelerator physics R&D and hold great promise in opening up new opportunities in accelerator based scientific facilities.
	Slides MOB03 [5.078 MB]

MOC02	Correlated Energy Spread Removal with Space Charge for High Gain Harmonic Generation
	E. Hemsing, G. Marcus, A. Marinelli SLAC, Menlo Park, California, USA D. Xiang Shanghai Jiao Tong University, Shanghai, People's Republic of China
	We study the effect of longitudinal space charge on the correlated energy spread of a relativistic beam that has been microbunched for the emission of coherent, high harmonic radiation. We show that, in the case of microbunching induced by a laser modulator followed by a dispersive chicane, longitudinal space charge forces can act to significantly reduce the induced energy spread of the beam without a reduction in the harmonic bunching content. This effect may be optimized to significantly increase the harmonic number achievable in seeded HGHG free electrons lasers, which are otherwise limited by the induced energy spread from the laser. The work presented here has been published in Reference [1]. [1] E. Hemsing et al., to appear in Phys. Rev. Lett. (2014)
	Slides MOC02 [4.092 MB]