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Operation and Recent Developments of the Photon Factory Advanced Ring

By: Miyajima, T.; Abe, T.; Yoshimoto, S.; Yamamoto, S.; Yamamoto, N.; Weixing, C.; Umemori, K.; Ueda, A.; Uchiyama, T.; Tsuchiya, K.; Tejima, M.; Tanimoto, Y.; Takasaki, S.; Ebihara, K.; Haga, K.; Harada, K.; Hori, Y.; Ieiri, T.; Isagawa, S.; Kageyama, T.; Kasuga, T.; Katoh, T.; Kawata, H.; Kikuchi, M.; Kobayashi, Y.; Kudo, K.; Mitsuhashi, T.; Nagahashi, S.; Nakamura, T.T.; Nakanishi, H.; Nogami, T.; Obina, T.; Ohsawa, Y.; Ono, M.; Ozaki, T.; Sakai, H.; Sakamoto, Y.; Sakanaka, S.; Sato, M.; Satoh, M.; Shioya, T.; Suetake, M.; Sugahara, R.; Tadano, M.; Takahashi, T.;

2005 / IEEE / 0-7803-8859-3

Description

This item was taken from the IEEE Conference ' Operation and Recent Developments of the Photon Factory Advanced Ring ' The Photon Factory Advanced Ring (PF-AR) is a synchrotron light source dedicated to X-ray research. Although the PF-AR is usually operated at a stored beam energy of 6.5 GeV, a 5.0 GeV mode is also available for medical application. In the 6.5 GeV mode, the beam current of 60 mA in a single-bunch and the typical lifetime of 15 hrs at the current have been archived. Single-bunch operation for pulsed X-ray and its relatively high beam energy characterize the PF-AR. However, the high-current in single-bunch causes several problems to be solved, such as the temperature rise of some of the vacuum components, a pressure increase in the ring, and a sudden drop of beam lifetime. In order to avoid these problems, developments of new methods have been continued. In this paper, the status and the recent developments of the PF-AR are presented. It concerns: the successful operation with a two-bunch high-current operation at 5.0 GeV; the vertical beam size control for the medical application; modulating the RF acceleration phase in order to elongate the bunch length; stabilizing temperature in the ring tunnel; the study for medium emittance operation with 160 nm � rad; transferring the RF cavities in order to install a new insertion device; an innovative injection scheme using a pulsed quadrupole magnet.