AUTHOR=Zhou F. , Adolphsen C. , Dowell D. , Xiang R. 

TITLE=Overview of CW electron guns and LCLS-II RF gun performance

JOURNAL=Frontiers in Physics

VOLUME=11

YEAR=2023

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2023.1150809

DOI=10.3389/fphy.2023.1150809

ISSN=2296-424X

ABSTRACT=<p>Various continuous-wave (CW) electron gun technologies are reviewed, including DC, superconducting radio frequency RF (SRF), hybrid DC-SRF and normal-conducting RF. Also, the SLAC Linac Coherent Light Source II (LCLS-II) normal-conducting RF gun and injector are described, and the performance to date, including the bunch emittance achieved and the dark current observed, is presented.</p>