PAC2013 - List of Authors (Kwiatkowski, S.)

Paper

Title

Page

Analysis and Optimization of Coupler Kick in APEX

607

H.J. Qian, S. Kwiatkowski, C. F. Papadopoulos, Z. Paret, F. Sannibale, J.W. Staples, R.P. Wells
LBNL, Berkeley, California, USA

A high repetition rate (~MHz) and high brightness photoinjector, based on VHF band CW normal conducting (NC) RF gun, is being developed under Advanced Photoinjector EXperiment (APEX) at Lawrence Berkeley Lab. A NC 30 MeV L-band linac system will be added after the gun to demonstrate beam brightness with lower repetition rate (~10 Hz). In this paper, coupler kicks from APEX buncher and acceleration cavities are evaluated by 3D RF simulation, analytical model and beam tracking, and coupler cells are optimized to minimize emittance dilution due to coupler kicks.

WEYA1

Recent Results from the APEX Project at LBNL

709

F. Sannibale, K.M. Baptiste, C.W. Cork, J.N. Corlett, S. De Santis, L.R. Doolittle, J.A. Doyle, D. Filippetto, G.L. Harris, G. Huang, R. Huang, T.D. Kramasz, S. Kwiatkowski, R.E. Lellinger, V. Moroz, W.E. Norum, C. F. Papadopoulos, G.J. Portmann, H.J. Qian, J.W. Staples, M. Vinco, R.P. Wells, M.S. Zolotorev
LBNL, Berkeley, California, USA
R. Huang
USTC/NSRL, Hefei, Anhui, People's Republic of China

Funding: This work was supported by the Director of the Office of Science of the US Department of Energy under Contract no. DEAC02-05CH11231
The commissioning at the Lawrence Berkeley National Laboratory (LBNL) of a high-brightness high-repetition rate (MHz-class) photo-gun, based on a normal conducting 186 MHz (VHF-band) RF cavity operating in CW mode, is now completed. The gun has been designed to satisfy the requirements for operating high-repetition rate 4th generation light sources. Test of high quantum efficiency photocathodes with bunches of hundreds pC at MHz repetition rate are now underway. They include, Cs2Te cathodes developed in collaboration with INFN-LASA and multialkali antimonides (CsK2Sb), prepared by a collaborating group at LBNL. The present experimental results and the plan for future activities are presented.

Slides WEYA1 [22.976 MB]

Paper	Title	Page
TUPMA09	Analysis and Optimization of Coupler Kick in APEX	607
	H.J. Qian, S. Kwiatkowski, C. F. Papadopoulos, Z. Paret, F. Sannibale, J.W. Staples, R.P. Wells LBNL, Berkeley, California, USA
	A high repetition rate (~MHz) and high brightness photoinjector, based on VHF band CW normal conducting (NC) RF gun, is being developed under Advanced Photoinjector EXperiment (APEX) at Lawrence Berkeley Lab. A NC 30 MeV L-band linac system will be added after the gun to demonstrate beam brightness with lower repetition rate (~10 Hz). In this paper, coupler kicks from APEX buncher and acceleration cavities are evaluated by 3D RF simulation, analytical model and beam tracking, and coupler cells are optimized to minimize emittance dilution due to coupler kicks.

WEYA1	Recent Results from the APEX Project at LBNL	709
	F. Sannibale, K.M. Baptiste, C.W. Cork, J.N. Corlett, S. De Santis, L.R. Doolittle, J.A. Doyle, D. Filippetto, G.L. Harris, G. Huang, R. Huang, T.D. Kramasz, S. Kwiatkowski, R.E. Lellinger, V. Moroz, W.E. Norum, C. F. Papadopoulos, G.J. Portmann, H.J. Qian, J.W. Staples, M. Vinco, R.P. Wells, M.S. Zolotorev LBNL, Berkeley, California, USA R. Huang USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: This work was supported by the Director of the Office of Science of the US Department of Energy under Contract no. DEAC02-05CH11231 The commissioning at the Lawrence Berkeley National Laboratory (LBNL) of a high-brightness high-repetition rate (MHz-class) photo-gun, based on a normal conducting 186 MHz (VHF-band) RF cavity operating in CW mode, is now completed. The gun has been designed to satisfy the requirements for operating high-repetition rate 4th generation light sources. Test of high quantum efficiency photocathodes with bunches of hundreds pC at MHz repetition rate are now underway. They include, Cs2Te cathodes developed in collaboration with INFN-LASA and multialkali antimonides (CsK2Sb), prepared by a collaborating group at LBNL. The present experimental results and the plan for future activities are presented.
	Slides WEYA1 [22.976 MB]