IPAC2013 - List of Authors (Zhang, Z.)

Paper	Title	Page
MOPFI037	Design and Experiment of a Compact C-band Photocathode RF Gun for UED	369
	X.H. Liu, H.B. Chen, W.-H. Huang, C.-X. Tang, Z. Zhang TUB, Beijing, People's Republic of China
	A compact C-band photocathode RF gun for the MeV UED facility is developed in Tsinghua University, which is designed to work at the frequency of 5.712GHz. This paper presents the physics and RF structure design, and beam dynamics optimization of this C-band RF gun. Some new structure design will be adopted in this gun, including the optimized cavity length and elliptical iris, which is helpful to achieve lower emittance and larger mode separation. This paper likewise presents experiment parameters and the cold test results of this C-band RF gun.

MOPFI062	Optimization Studies for the SwissFEL RF-Gun	425
	M. Schaer, A. Adelmann, A. Anghel, S. Bettoni, P. Craievich, L. Stingelin, C. Vicario, R. Zennaro PSI, Villigen PSI, Switzerland Z. Zhang TUB, Beijing, People's Republic of China
	The 250 MeV SwissFEL injector test facility is in operation since August 2010. Measurements with the "CTF2 Gun 5" photocathode S-band rf-gun show promising beam parameters and satisfy the requirements of the SwissFEL project. Since the performance of the electron source is fundamental for the stability and brightness of a free electron laser, further gun optimization studies are pursued. Under investigation is currently a 3.6 cell C-band gun. First ASTRA simulations indicate that with this gun the peak-current can be increased, thanks to a shorter laser pulse and a higher initial acceleration, by almost a factor of two, at slightly better emittance values than the S-band "PSI Gun 1". Since the beam-quality depends also on the achieved performance of the cathode, several copper cathodes had been tested in the SwissFEL injector test facility to analyze the observed rapid degradation of quantum efficiency.

Paper

Title

Page

Design and Experiment of a Compact C-band Photocathode RF Gun for UED

369

X.H. Liu, H.B. Chen, W.-H. Huang, C.-X. Tang, Z. Zhang
TUB, Beijing, People's Republic of China

A compact C-band photocathode RF gun for the MeV UED facility is developed in Tsinghua University, which is designed to work at the frequency of 5.712GHz. This paper presents the physics and RF structure design, and beam dynamics optimization of this C-band RF gun. Some new structure design will be adopted in this gun, including the optimized cavity length and elliptical iris, which is helpful to achieve lower emittance and larger mode separation. This paper likewise presents experiment parameters and the cold test results of this C-band RF gun.

MOPFI062

Optimization Studies for the SwissFEL RF-Gun

425

M. Schaer, A. Adelmann, A. Anghel, S. Bettoni, P. Craievich, L. Stingelin, C. Vicario, R. Zennaro
PSI, Villigen PSI, Switzerland
Z. Zhang
TUB, Beijing, People's Republic of China

The 250 MeV SwissFEL injector test facility is in operation since August 2010. Measurements with the "CTF2 Gun 5" photocathode S-band rf-gun show promising beam parameters and satisfy the requirements of the SwissFEL project. Since the performance of the electron source is fundamental for the stability and brightness of a free electron laser, further gun optimization studies are pursued. Under investigation is currently a 3.6 cell C-band gun. First ASTRA simulations indicate that with this gun the peak-current can be increased, thanks to a shorter laser pulse and a higher initial acceleration, by almost a factor of two, at slightly better emittance values than the S-band "PSI Gun 1". Since the beam-quality depends also on the achieved performance of the cathode, several copper cathodes had been tested in the SwissFEL injector test facility to analyze the observed rapid degradation of quantum efficiency.