CERN Accelerating science

Article
Title	Operation and Recent Developments of the Photon Factory Advanced Ring
Author(s)	Miyajima, Tsukasa ; Abe, Tetsuo ; Ebihara, Kiyokazu ; Haga, Kaiichi ; Harada, Kentaro ; Hori, Yoichiro ; Ieiri, Takao ; Isagawa, Shigeru ; Kageyama, Tatsuya ; Kasuga, Toshio ; Katoh, Tadahiko ; Kawata, Hiroshi ; Kikuchi, Mitsuo ; Kobayashi, Yukinori ; Kudo, Kikuo ; Mitsuhashi, Toshiyuki ; Nagahashi, Shinya ; Nakamura, Tatsuro ; Nakanishi, Hiroshi ; Nogami, Takashi ; Obina, Takashi ; Ohsawa, Yasunobu ; Ono, Masaaki ; Ozaki, Toshiyuki ; Sakai, Hiroshi ; Sakamoto, Yutaka ; Sakanaka, Shogo ; Sato, Masayuki ; Satoh, Masato ; Shioya, Tatsuro ; Suetake, Masaaki ; Sugahara, Ryuhei ; Tadano, Mikito ; Takahashi, Takeshi ; Takasaki, Seiji ; Tanimoto, Yasunori ; Tejima, Masaki ; Tsuchiya, Kimichika ; Uchiyama, Takashi ; Ueda, Akira ; Umemori, Kensei ; Xing Cheng, Wei ; Yamamoto, Noboru ; Yamamoto, Shigeru ; Yoshimoto, S
Affiliation	(KEK, Ibaraki)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2845
Subject category	Accelerators and Storage Rings
Abstract	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 In 6.5 GeV mode the typical lifetime of 15 hrs and the beam current of 60 mA with a single-bunch have been archived.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.