PHOTOCATHODE ELECTRON SOURCE DEVELOPMENT AT

Advanced Energy Systems is developing several novel photocathode electron sources. One of these sources, which is fully superconducting, is intended to provide a high-brightness, quasi-CW stream of electron bunches from a very compact gun system. A second source is normal conducting, but utilizes a very robust, high-quantum-efficiency photocathode. This gun is intended for use in applications such as high-gain FEL's or next generation linear colliders. We will report on the research that has been performed on the performance of the photocathode materials and describe the basic design of these photocathode RF electron guns together with projecting their expected performance. It is shown that the superconducting gun exhibits much promise while the normal conducting gun results are inconclusive at this time.