Cs-Te photocathode RF electron gun for applied research at the Waseda University

Kazuyuki Sakaue, Hitoshi Hayano, Shigeru Kashiwagi, Ryunosuke Kuroda, Akihiko Masuda, Tatsuya Suzuki, Toshikazu Takatomi, Nobuhiro Terunuma, Junji Urakawa, Masakazu Washio

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10 Citations (Scopus)


A compact electron accelerator based on photo-cathode RF electron gun is under development for applied research at the Waseda University. Higher charge and higher energy are key issues for applications such as pulse radiolysis experiment and laser-Compton X-ray generation. The new RF-gun cavity with cesium telluride (Cs-Te) photo-cathode which has higher quantum efficiency (Q.E.) compared with metal cathodes has been installed. The evaluation of Q.E. of the photo-cathode has been performed and the value obtained is more than 5% at the preparation stage. For understanding the Cs-Te cathode properties and the higher Q.E. operation, fundamental studies by single bunch beam operation have been performed resulting in more than 6 nC bunch charge with a high Q.E. of 2.9%. Additionally, the new RF-gun cavity was improved for obtaining a higher Q value. Higher beam energy, i.e. shunt impedance compared with old type cavity, was observed. The shunt impedance increased by about 20%. These successful results will considerably contribute to the applied research.

Original languageEnglish
Pages (from-to)2928-2931
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Issue number24
Publication statusPublished - 2011 Dec 15


  • Laser-Compton scattering
  • Photo-cathode
  • Pulse radiolysis
  • Quantum efficiency
  • Rf electron gun


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