Operation and Recent Developments of the Photon Factory Advanced Ring

• Published in: Proceedings of the 2005 Particle Accelerator Conference pp. 2845 - 2847
• Main Authors: Miyajima, T., Abe, T., 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., Takasaki, S., Tanimoto, Y., Tejima, M., Tsuchiya, K., Uchiyama, T., Ueda, A., Umemori, K., Weixing, C., Yamamoto, N., Yamamoto, S., Yoshimoto, S.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2005
• Subjects: Biomedical equipment; Light sources; Medical services; Particle beams; Production facilities; Pulse modulation; Radio frequency; Size control; Synchrotrons; Temperature
• ISBN: 9780780388598; 0780388593
• ISSN: 1944-4680; 2152-9582
• DOI: 10.1109/PAC.2005.1591289

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In the 6.5 GeV mode, the beam current of 60 mA in a single-bunch and the typical lifetime of 15 hrs at the current have been archived.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.