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Cesium telluride cathodes for the next generation of high-average current high-brightness photoinjectors
- Source :
- Applied Physics Letters. 107:042104
- Publication Year :
- 2015
- Publisher :
- AIP Publishing, 2015.
-
Abstract
- 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.
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 107
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........8b1db992f4788383690551c202499eaa