Bright, radio frequency photocathode electron guns are the choice for most high-performance research accelerator sources. Until recently, their complexity, cost and average beam power had restricted their application in industry. Several novel photocathode electron sources and their performance are described. These include a fully superconducting, compact source for quasi-continuous applications that is being developed in collaboration with Brookhaven National Laboratory and a modification of the Jefferson Laboratory injector for high average power free-electron laser applications. Normal-conducting, high-brightness sources for intense, low-repetition-rate research and commercial applications utilizing metal or robust, high quantum efficiency photocathodes, are discussed.
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