| Paper |
Title |
Page |
| MOPP074 |
Improvement of an S-band RF-gun cavity with a Cs-Te Photo-cathode
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721 |
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- A. Murata, Y. Hama, T. Hirose, Y. Kato, K. Sakaue, T. Suzuki, M. Washio
RISE, Tokyo
- H. Hayano, N. Kudoh, T. T. Takatomi, N. Terunuma, J. Urakawa
KEK, Ibaraki
- Y. Kamiya
University of Tokyo, Tokyo
- S. Kashiwagi
ISIR, Osaka
- M. Kuriki
Hiroshima University, Graduate School of Science, Higashi-Hiroshima
- R. Kuroda
AIST, Tsukuba, Ibaraki
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A 1.6cell S-band photo-cathode RF-Gun is one of the good alternatives of the short pulse electron source. Therefore,we are operating as a high brightness short pulse electron source for studying a reaction of radiation chemistry,an inverse Compton scattering at Waseda University and as an injector at KEK-ATF. To improve an electron beam quality and to reduce a dark current,we decided to improve the RF-Gun cavity. Frequency tuning of the half cell of existing RF-gun was performed by the torque control of Helicoflex seal on the cathode plate and two moving rod type tuners were installed on the full cell. Newly designed RF-Gun cavity has four compact tuners on each cell,which can be tune the frequency to deform the cavity wall,to remove the Helicoflex seal and tuning holes that were considered to be the major cause of electric discharge and/or a dark current source. According to these improvements,the Q-value and shunt impedance of the cavity is 30% larger than that of existing guns. As the result,the reduction of dark current is succeeded and the beam energy is reached up to 5.5MeV at 10MW RF input. The detailed results of electron beam generation will be reported at the conference.
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| WEPP096 |
Nextef: The 100MW X-band Test Facility in KEK
|
2740 |
| |
- S. Matsumoto, M. Akemoto, S. Fukuda, T. Higo, N. Kudoh, H. Matsushita, H. Nakajima, T. Shidara, K. Yokoyama, M. Yoshida
KEK, Ibaraki
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Nextef is a new X-band test facility in KEK. By combining the power from two klystrons, 100MW-class X-band RF power will be available. The facility is for researches on future high gradient linear accelerators. The commissioning operation of the whole facility was started in November 2007. It is planed to conduct high power testing of X-band accelerator structures as well as the fundamental researches such as the RF breakdown experiment with specially designed waveguides.
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