TY - JOUR
T1 - Cs-Te photocathode RF electron gun for applied research at the Waseda University
AU - Sakaue, Kazuyuki
AU - Hayano, Hitoshi
AU - Kashiwagi, Shigeru
AU - Kuroda, Ryunosuke
AU - Masuda, Akihiko
AU - Suzuki, Tatsuya
AU - Takatomi, Toshikazu
AU - Terunuma, Nobuhiro
AU - Urakawa, Junji
AU - Washio, Masakazu
N1 - Funding Information:
The authors would like to express their sincere thanks to all the KEK-ATF collaborators for supporting the development of the new high Q cavity and the cathode preparation for this work. This work was partially supported by a High-Tech research center project No. HRC707 of MEXT, KEK University Support and JSPS (A) 10001690.
PY - 2011/12/15
Y1 - 2011/12/15
N2 - 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.
AB - 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.
KW - Laser-Compton scattering
KW - Photo-cathode
KW - Pulse radiolysis
KW - Quantum efficiency
KW - Rf electron gun
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U2 - 10.1016/j.nimb.2011.04.041
DO - 10.1016/j.nimb.2011.04.041
M3 - Article
AN - SCOPUS:81855183248
SN - 0168-583X
VL - 269
SP - 2928
EP - 2931
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 24
ER -