Topic（题目）：Design, performance, and application of the SRF Gun II at HZDR
Speaker（报告人）：向蓉（德国德累斯顿亥姆霍兹研究所）
Date（时间）: 7月18日（星期二）上午9:30
Place（地点）：北京大学射频超导加速器实验室二楼会议室
Contact Person（联系人）：黄森林（huangsl@pku.edu.cn）
Abstract（摘要）：
Superconducting RF guns are able to generate continuous-wave (CW) electron beams with high average current and high brightness. Helmholtz-Zentrum Dresden- Rossendorf (HZDR) SRF Gun II is the worldwide unique SRF gun used for user operation, which has been applied to generate short electron pulses for THz superradiant beamline at electron linac for beams with high brilliance and low emittance (ELBE). After a period of commissioning, the routine operation of the SRF gun II is possible after 2017 and now more than 1800 hours of user beam is available every year. It is operated with a gradient of 8 MV/m, providing bunch charges of 200~300 pC at typical repetition rates of 100 kHz. A total number of 24 cathodes (2 Cu, 12 Mg, 10 Cs2Te) have been used inside since then, without observing serious cavity degradation. The speaker will present the design and performance of the SRF gun II, also its application for production of coherent terahertz radiation at the ELBE.
Biography（报告人简介）：
向蓉，1999年北京大学技术物理系本科毕业，同年进入北京大学重离子物理研究所射频超导课题组攻读博士学位，师从陈佳洱院士和赵夔教授学习和研究射频超导技术和DC-SRF光阴极电子枪，2004年博士毕业后到德国德累斯顿亥姆霍兹研究所ELBE辐射物理中心工作，主要研究方向是光电阴极和射频超导电子枪。
