Cesium telluride cathodes for the next generation of high-average current high-brightness photoinjectors
Cesium telluride cathodes for the next generation of high-average current high-brightness photoinjectors
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DOI：
10.1063/1.4927700
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发表时间：
2015-07-27
影响因子：
4
通讯作者：
Sannibale, F.
中科院分区：
文献类型：
--
作者：
Filippetto, D.;Qian, H.;Sannibale, F.
我们报告了 Cs2Te 光电阴极在高峰值时间相关加速场、连续波操作和平均电流高达 0.3 mA 的 MHz 脉冲提取等极端条件下的性能。在正常导电腔中进行的测量显示出更长的使用寿命和鲁棒性，阐明了阴极退化的主要机制，并设置了所需的系统真空性能以与高平均功率无X射线电子激光用户设施的操作兼容，为下一代MHz级超快科学仪器打开了大门。 (C) 2015 AIP 出版有限责任公司。
We report on the performances of a Cs2Te photocathode under extreme conditions of high peak time-dependent accelerating fields, continuous wave operations, and MHz pulse extraction with up to 0.3 mA average current. The measurements, performed in a normal conducting cavity, show extended lifetime and robustness, elucidate the main mechanisms for cathode degradation, and set the required system vacuum performance for compatibility with the operations of a high average power X-ray free electron laser user facility, opening the doors to the next generation of MHz-scale ultrafast scientific instruments. (C) 2015 AIP Publishing LLC.