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DEVELOPMENT OF LOW-EMITTANCE ELECTRON GUN USING SINGLE-CRYSTAL CeB 6 THERMIONIC CATHODE
| Content Provider | Semantic Scholar |
|---|---|
| Author | Togawa, Kazuaki |
| Copyright Year | 2010 |
| Abstract | Development of a low-emittance electron gun for the x-ray free electron laser (XFEL) project at SPring-8 (XFEL/SPring-8) was started in 2001. A single-crystal CeB6 thermionic cathode was chosen as an electron emitter to satisfy the requirements of the XFEL; low emittance, uniform emission, stability, reproducibility, long lifetime, etc. After several failures and improvements, we succeeded in heating the cathode up to 1500C using a graphite heater. The cathode assembly was tested at the 500-kV gun test stand. The measured normalized emittance of 0.6 mm mrad (rms, 90% core part) satisfied the requirement of the XFEL. The CeB6 gun continues to produce stable low-emittance electron beams at the SCSS test accelerator. The gun will operate in the XFEL/SPring-8 from 2011. CeB6単結晶熱カソードを用いた低エミッタンス電子銃の開発 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.pasj.jp/web_publish/pasj6/papers/frata05.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |