Photo-cathode RF-gun System - KEK

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High Energy Accelerator Research OrganizationRoughness of the cathode surfaceThe Copper Cathode of the RF-gunThe surface of the cathode has many craters.These craters are a cause of the emittance growth.Research Institute for Science and Engineering, Waseda University
High Energy Accelerator Research OrganizationSummaryWe confirmed that the Photo-cathode RF-gun system have a goodperformance at KEK-ATF.Beam transmission was achieved up to 100% in case of the L0-BTend part.We can suggest that the beam will be passed through the DR completelyin near future.The emittance of the beam from RF-gun was not as small as we have expected.The RF-gun cavity and cathode was used for a long time at Tokyo University.Future WorksThe surface of the cathode has many craters.We will design and manufacture the new RF-gun cavity and cathode for themulti-bunch beam.Test experiment for the multi pulse laserResearch Institute for Science and Engineering, Waseda University
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Photo-cathode RF-gun System - KEK

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