ERL07 WORKING GROUP 1 SUMMARY: ELECTRON GUNS AND

This paper summarizes the presentations and discussions of Working Group 1- Electron Guns and Injectors – of the 2007 Energy Recovering Linacs Workshop (ERL07). There was general consensus that there has been considerable progress in the areas of guns, photocathodes, drive-laser development and injector design since the previous workshop ERL05 [1]. Many of these developments are described below