| Paper |
Title |
Page |
| TUPMA102 |
Installation and Radiation Maintanance Scenario for J-PARC 50 GeV Synchrotron
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247 |
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- M. Yoshioka, T. Fujino, Y. Hori, K. Ishii, H. Kobayashi, T. Kubo, H. Matsumoto, H. Oki, T. Oogoe, Y. Saito, Y. Sato, M. Shimamoto, M. J. Shirakata, Y. Takeuchi, M. Uota, Y. Watanabe
KEK, Ibaraki
- M. HOSOKAWA
THK CO., LTD, Hitachinaka
- Y. Kuniyasu
MELCO SC, Tsukuba
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Installation and assembling of accelerator components for J-PARC 50 GeV Synchrotron are now underway. Off-beam commissioning will be carried out between December 2007 and April 2008, and the full commissioning of J-PARC accelerator complex, which is consisted of an injector linac, a 3 GeV rapid cycling synchrotron and the 50 GeV Synchrotron, will be started from May 2008. This paper describes the status, schedule and method of installation and assembling of accelerator components. Radiation maintenance scenario will be also described.
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| TUPMA111 |
Present Status of J-PARC MR Synchrotron
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259 |
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- T. Koseki, H. Kobayashi, H. Matsumoto, M. Yoshioka
KEK, Ibaraki
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The Japan Proton Accelerator Research Complex (J-PARC) is a joint project of High Energy Accelerator Research Organization (KEK) and Japan Atomic Energy Agency (JAEA). The J-PARC accelerator complex is composed of a 400 MeV proton linac, a 3 GeV Rapid-Cycling Synchrotron (RCS), and a 50 GeV Proton Synchrotron (MR). Installation of the MR which has two extraction sections, fast extraction for the Neutrino Facility and slow extraction for the Hadron Facility, is now underway. Test of injection and extraction components such as septum magnets and kicker magnets is progressed as well. Beam commissioning scenario is now being prepared. Maintenance scenario of activated components is also crucial in a high power proton accelerator. Beam commissioning will start in May 2008.
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| WEPMA105 |
High Power Test of C-band Accelerating System for Japanese XFEL Project
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470 |
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- K. Shirasawa, T. Inagaki, H. Kitamura, T. Shintake
RIKEN Spring-8 Harima, Hyogo
- H. Baba, H. Matsumoto
KEK, Ibaraki
- S. Miura
MHI, Hiroshima
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?The C-band (5712 MHz) choke-mode type accelerating structure will be used for SCSS: SPring-8 Compact SASE Source project. Since the C-band accelerator generates higher accelerating gradient than traditional S-band accelerator, it makes the machine size compact and the cost low. In order to confirm the performance of the C-band accelerating system for the 8 GeV XFEL machine, the system including the same accelerating structure and RF system have been installed in the SCSS prototype accelerator. The first SASE amplification was observed at 49 nm on June 2006. In the prototype machine, four 1.8 m long C-band accelerating structures are used to accelerate electron up to 250 MeV. The C-band accelerator?unit has one 50 MW klystron and pulse compressor, where two types of pulse compressors: SKIP and SLED were adapted. After 300-hour RF conditioning, accelerating gradient up to 32 MV/m was achieved and we confirmed there is no serious problem. Now we continue the RF conditioning to get higher accelerating gradient and find the practical limit. In this paper, we would like to report on the RF conditioning and the achieved performance of the C-band accelerator.
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