Monday, April 4, 2011, 4:00 pm — Large Conference Room, Bldg. 911B
Advances in electron beam technology have made possible innovative radiation sources for basic research and applied science. An example is the successful demonstration of the world’s first SASE FEL (Self-Amplified Spontaneous Emission Free Electron Laser) at hard x-ray wavelengths now operating at SLAC. This facility was built to provide coherent x-ray beams for studies in the materials and biological sciences. The topic of this seminar is the photocathode RF gun electron source which is a critical component of all FELs. This seminar is motivated by the need to further understand and improve the beam from this type of electron source and describes some of the important sources of emittance in the photocathode RF gun. The reduction of beam quality due to fundamental cathode photoemission physics, space charge effects close to the cathode and optical distortions introduced by solenoid fields are described and analytic expressions for these phenomena are derived and compared with numerical simulations. Methods for mitigating these emittance sources are discussed.
Hosted by: Vladimir Litvinenko
7156 | INT/EXT | Events Calendar
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