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| THPMN027 |
Status of C-band Accelerator Module in the KEKB Injector Linac
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2769 |
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- T. Kamitani, T. Higo, M. Ikeda, K. Kakihara, N. Kudoh, S. Ohsawa, T. Sugimura, T. T. Takatomi, K. Yokoyama
KEK, Ibaraki
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For future upgrade of the KEKB injector linac, components of C-band accelerator module have been developed since 2002. A prototype C-band accelerator module composed of a 50-MW klystron, an RF-pulse compressor and four 1-m long accelerating sections, has been constructed in the present S-band injector linac. It has been operated for 14 months. In a recent beam-acceleration study, it has achieved an energy gain of 151 MeV, which corresponds to an average acceleration field of 39 MV/m.
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| THPMN031 |
Experiment of X-Ray Source by 9.4 GHz X-Band Linac for Nondestractive Testing System
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2781 |
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- T. Natsui, K. Dobashi, M. Uesaka, T. Yamamoto
UTNL, Ibaraki
- M. Akemoto, S. Fukuda, T. Higo, N. Kudoh, T. T. Takatomi, M. Yoshida
KEK, Ibaraki
- F. Sakamoto, A. Sakumi
The University of Tokyo, Nuclear Professional School, Ibaraki-ken
- E. Tanabe
AET Japan, Inc., Kawasaki-City
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We are developing a compact X-ray source for Nondestractive Testing (NDT) system. We aim to develop a portable X-ray NDT system by 950 keV X-band linac to realize in-site inspection. Our system has 20 kV electron gun, and accelerate electron beam to 950 keV with 9.4 GHz X-band linac. RF source of this system is 250kW magnetron. Our target spot size and spatial resolution are 1mm. We adopted APS (Alternative Periodic Structure) tube of pi/2 mode for easy manufacturing. It is difficult to realize a high-shunt-impedance for low-energy-cells, which attributes to manufacturing problems. Instead, we use three pi-mode cavities there. Further, we choose the low power magnetron for small cooling system and the low voltage electron gun for small power supply. For the stability of the X-ray yield the system include the Auto Frequency Control (AFC), which detect and tune the frequency shift at the magnetron. We have also performed X-ray generation calculation by the Monte Carlo code of GEANT and EGS to confirm the X-ray source size. We are going to construct the whole system and verify it experimentally. Updated results are presented at the spot.
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| THPMN040 |
Development of an S-band Cs2Te-Cathode RF Gun with New RF Tuners
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2808 |
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- Y. Kamiya, Y. Kato, A. Murata, K. Sakaue, M. Washio
RISE, Tokyo
- N. Kudoh, M. Kuriki, T. T. Takatomi, N. Terunuma, J. Urakawa
KEK, Ibaraki
- R. Kuroda
AIST, Tsukuba, Ibaraki
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We have been studying an S-band Cs2Te-Cathode RF Gun with 1.6 cells. The new gun cavity reported in this poster has new RF tuners, which are compact and, therefore, can be attached even on the half-cell. RF balance between the full- and half-cells is adjustable by using the tuners on both cells. Compared to the existing cavity, a Helicoflex seal for half-cell adjustment is not needed for new one. This structure is expected to have advantages for gun machining, for Q factor of the cavity, and for reduction of dark current from the RF gun. The cathode is made by evaporation on a Mo plug, and the plug is attached by a load lock system. We report status of the gun development.
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