Hi fellows, I've been looking for "High Repetitive Photocathode RF Guns" for more than a couple of days. It seems, first I need to understand the RF Guns. I deciced to search such a document that gives the history of RF Guns and explains their historical background with working principle. So I can understand better the deal that I have. So far I've got just the scientific articles that gives really really short infos about what I'm looking for. Does any of you, please, help me on this topic? Will be waiting for your help.