Share Email Print
cover

Proceedings Paper

Tests of photocathodes for high repetition rate x-ray FELs at the APEX facility at LBNL
Author(s): Fernando Sannibale; Daniele Filippetto; Houjun Qian; Christos F. Papadopoulos; Russell Wells; Toby Kramasz; Howard Padmore; Jun Feng; James Nasiatka; Ruixuan Huang; Max Zolotorev; John W. Staples
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

After the formidable results of X-ray 4th generation light sources based on free electron lasers around the world, a new revolutionary step is undergoing to extend the FEL performance from the present few hundred Hz to MHz-class repetition rates. In such facilities, temporally equi-spaced pulses will allow for a wide range of previously non-accessible experiments. The Advanced Photo-injector EXperiment (APEX) at the Lawrence Berkeley National Laboratory (LBNL), is devoted to test the capability of a novel scheme electron source, the VHF-Gun, to generate the required electron beam brightness at MHz repetition rates. In linac-based FELs, the ultimate performance in terms of brightness is defined at the injector, and in particular, cathodes play a major role in the game. Part of the APEX program consists in testing high quantum efficiency photocathodes capable to operate at the conditions required by such challenging machines. Results and status of these tests at LBNL are presented.

Paper Details

Date Published: 12 May 2015
PDF: 10 pages
Proc. SPIE 9512, Advances in X-ray Free-Electron Lasers Instrumentation III, 95121N (12 May 2015); doi: 10.1117/12.2181912
Show Author Affiliations
Fernando Sannibale, Lawrence Berkeley National Lab. (United States)
Daniele Filippetto, Lawrence Berkeley National Lab. (United States)
Houjun Qian, Lawrence Berkeley National Lab. (United States)
Christos F. Papadopoulos, Lawrence Berkeley National Lab. (United States)
Russell Wells, Lawrence Berkeley National Lab. (United States)
Toby Kramasz, Lawrence Berkeley National Lab. (United States)
Howard Padmore, Lawrence Berkeley National Lab. (United States)
Jun Feng, Lawrence Berkeley National Lab. (United States)
James Nasiatka, Lawrence Berkeley National Lab. (United States)
Ruixuan Huang, Univ. of Science and Technology of China (China)
Max Zolotorev, Lawrence Berkeley National Lab. (United States)
John W. Staples, Lawrence Berkeley National Lab. (United States)


Published in SPIE Proceedings Vol. 9512:
Advances in X-ray Free-Electron Lasers Instrumentation III
Sandra G. Biedron, Editor(s)

© SPIE. Terms of Use
Back to Top