| Paper |
Title |
Page |
| RPAE044 |
Operation and Recent Developments of the Photon Factory Advanced Ring
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2845 |
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- T. Miyajima, T. Abe, W.X. Cheng, K. Ebihara, K. Haga, K. Harada, Y. Hori, T. Ieiri, S. Isagawa, T. Kageyama, T. Kasuga, T. Katoh, H. Kawata, M. Kikuchi, Y. Kobayashi, K. Kudo, T. Mitsuhashi, S. Nagahashi, T.T. Nakamura, H. Nakanishi, T. Nogami, T. Obina, Y. Ohsawa, M. Ono, T. Ozaki, H. Sakai, Y. Sakamoto, S. Sakanaka, M. Sato, M. Satoh, T. Shioya, M. Suetake, R. Sugahara, M. Tadano, T. Takahashi, S. Takasaki, Y. Tanimoto, M. Tejima, K. Tsuchiya, T. Uchiyama, A. Ueda, K. Umemori, N. Yamamoto, S. Yamamoto, S.I. Yoshimoto
KEK, Ibaraki
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The Photon Factory Advanced Ring (PF-AR) is a synchrotron light source dedicated to X-ray research. The PF-AR is usually operated at a beam energy of 6.5 GeV, but a 5.0 GeV mode is also available for medical application. In 6.5 GeV mode the typical lifetime of 15 hrs and the beam current of 60 mA with a single-bunch have been archived. Almost full-time single-bunch operation for pulse X-ray characterize the PF-AR. However, single-bunch high-current caused several problems to be solved, including the temperature rise of the some of the vacuum component, a pressure increase in the ring, and a sudden drop in lifetime. In order to avoid these issues the developments of new methods have been continued. In this paper, the status and the recent developments of the PF-AR will be presented. It concerns: the successful operation with two-bunch high-current in 5.0 GeV mode; varying the vertical beam size for the medical application; modulating the RF acceleration phase in order to elongate the length of bunch; stabilizing temperature in the ring tunnel; the study for medium emittance operation with 160 nmrad; moving the RF cavities in order to install a new insertion device; an innovative injection scheme using a pulsed quadrupole magnet.
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| ROPA003 |
Present Status of the J-PARC Control System
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302 |
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- T. Katoh, K. Furukawa, N. Kamikubota, H. Nakagawa, J.-I. Odagiri, G.S. Shen, Y. Takeuchi, N. Yamamoto, M. Yoshii
KEK, Ibaraki
- H. Sakaki, H. Sako, H. Takahashi, F. Tamura, H. Yoshikawa
JAERI, Ibaraki-ken
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Construction of the J-PARC control system is in progress and the present status is reported. The control system is based on EPICS tool-kit used in KEKB and other accelerator control systems at KEK. The control hardware and network system for Linac and RCS(Rapid Cycling Synchrotron) have been installed and software is under development now. The operation of Linac is expected in next year. The test of the first part of the accelerator complex; e.g. ion source, RFQ and the first DTL(20 MeV) were done at KEK site. Development of various software such as device drivers for the new equipment, device support routines, and some application programs for operators were also developed.
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| FPAT071 |
Timing System for J-PARC
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3853 |
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- F. Tamura
JAERI/LINAC, Ibaraki-ken
- J.C. Chiba, T. Katoh, M. Yoshii
KEK, Ibaraki
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J-PARC has three accelerators running at the different repetition rates; a 400-MeV linac (50Hz), a 3-GeV rapid cycling synchrotron (RCS, 25Hz), and a 50-GeV synchrotron (MR). The linac and the RCS deliver the beam pluses to the different destinations in each cycle. The destinations are scheduled according to the machine operations. We define two kinds of timing, "scheduled timing" and "synchronization timing" so that the accelerators are operated with proper timing and the beam pulses are transported to the experimental facilities or the next accelerators. The J-PARC complex requires a stable and precise timing system. The system is based on a master clock generated by a synthesizer and the triggers are operated independently of the AC-line frequency. We describe the design of the J-PARC timing system and their configuration, and also present the hardware details.
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