| Paper | Title | Page |
|---|---|---|
| TUPC17 | Development of a 500-kV Photo-Cathode DC Gun for the ERL Light Sources in Japan | 277 |
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Energy recovery linac (ERL) based next generation light sources such as X-ray oscillator require high brightness electron gun. We have developed a 500-kV, 10-mA photocathode DC gun by the collaboration efforts of JAEA, KEK, Hiroshima Univ. and Nagoya Univ. A segmented cylindrical ceramic insulator with guard rings is employed to improve stability and robustness at high voltage operation by keeping secondary electrons away from the ceramic surface. A Cockcroft-Walton power supply is installed in a SF6 tank and high voltage test up to 550kV was successfully done. All the vacuum chambers are made of chmically polished titanium alloy with very low out-gassing. A photocathode preparation system was assembled and vacuum test is performed. Up-to-date status of the gun development will be presented in detail. |