CERN Accelerating science

Article
Title	Performance and Modeling of the JLab IR FEL Upgrade Injector
Author(s)	Hernandez-Garcia, Carlos ; Beard, Kevin ; Benson, S V ; Herman-Biallas, George ; Bullard, Don ; Douglas, David ; Dylla, Fred ; Evans, Richard ; Grippo, A ; Gubeli, Joe ; Jordan, Kevin ; Neil, George ; Shinn, Michelle D ; Siggins, Tim ; Walker, Richard ; Yunn, Byung ; Zhang, Shukui
Affiliation	(Jefferson Lab, Newport News, Virginia)
Publication	2004
In:	26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. TUPOS61
Subject category	Accelerators and Storage Rings
Abstract	The JLab IR Upgrade Injector has delivered up to 9.1 mA CW of electron beam current at 9 MeV. The injector is driven by a 350 kV DC Photocathode Gun. Injector behavior and beam-based measurements are in very good agreement with PARMELA simulations. The injected beam envelopes were established by measuring beam spot sizes and comparing them with those predicted by a transport matrix based model. The emittances were measured by fitting an initial trial beam matrix to the measured data. The injected bunch length was established by measuring the energy spread downstream of the Linac while operating at either side of crest.