Green upgrading of SPring-8 to produce stable, ultrabrilliant hard X-ray beams
SPring-8-II is a major upgrade project of SPring-8 that was inaugurated in October 1997 as a third-generation synchrotron radiation light source. This upgrade project aims to achieve three goals simultaneously: achievement of excellent light source performance, refurbishment of aged systems, and significant reduction in power consumption for the entire facility. A small emittance of 50 pm rad will be achieved by (1) replacing the existing double-bend lattice structure with a five-bend achromat one, (2) lowering the stored beam energy from 8 to 6 GeV, (3) increasing the horizontal damping partition number from 1 to 1.3, and (4) enhancing horizontal radiation damping by installing damping wigglers in long straight sections. The use of short-period in-vacuum undulators allows ultrabrilliant X-rays to be provided while keeping a high-energy spectral range even at the reduced electron-beam energy of 6 GeV. To reduce power consumption, the dedicated, aged injector system has been shut down and the high-performance linear accelerator of SACLA, a compact X-ray free-electron laser (XFEL) facility, is used as the injector of the ring in a time-shared manner. This allows the simultaneous operation of XFEL experiments at SACLA and full/top-up injection of the electron beam into the ring. This paper overviews the concept of the SPring-8-II project, the system design of the light source and the details of the accelerator component design.
Authors
- Noriyoshi Azumi
- Mitsuhiro Masaki (ORCID: https://orcid.org/0000-0002-3497-3017)
- M. Tajima (ORCID: https://orcid.org/0000-0003-4715-080X)
- Kazuhiro Tamura (ORCID: https://orcid.org/0009-0001-3561-8869)
- Masaya Oishi (ORCID: https://orcid.org/0009-0000-4427-7173)
- T. Hiraiwa (ORCID: https://orcid.org/0000-0003-4251-2947)
- Eito Iwai (ORCID: https://orcid.org/0000-0001-8691-4396)
- Hirokazu Maesaka (ORCID: https://orcid.org/0000-0002-6205-5571)
- Kenji Fukami (ORCID: https://orcid.org/0000-0002-1207-3237)
- Yukiko Taniuchi
- Yosuke Ueda
- Tamotsu Magome (ORCID: https://orcid.org/0000-0002-7661-1786)
- Chikara Kondo
- T. Taniuchi (ORCID: https://orcid.org/0000-0001-9193-4965)
- Tetsuya Ishikawa (ORCID: https://orcid.org/0000-0002-6906-9909)
- Hideki Dewa (ORCID: https://orcid.org/0000-0001-6534-0266)
- Yuichiro Kida
- Takahiro Fujita (ORCID: https://orcid.org/0000-0002-8346-485X)
- S. Takano (ORCID: https://orcid.org/0000-0001-8759-9690)
- M. Kawase
- Hitoshi Tanaka (ORCID: https://orcid.org/0000-0003-1848-2338)
- K. Imamura
- T. Tomai (ORCID: https://orcid.org/0009-0003-9964-0381)
- Takahiro Watanabe (ORCID: https://orcid.org/0000-0001-8896-9788)
- Hiroshi Yamaguchi (ORCID: https://orcid.org/0000-0002-7787-8116)
- Akihiro Kagamihata (ORCID: https://orcid.org/0000-0002-9107-0746)
- Makina Yabashi (ORCID: https://orcid.org/0000-0002-2472-1684)
- Shinichi Matsubara (ORCID: https://orcid.org/0000-0001-9812-8827)
- Shinji Suzuki
- Tsuyoshi Aoki (ORCID: https://orcid.org/0009-0008-9167-2107)
- Toru Hara (ORCID: https://orcid.org/0000-0002-4844-161X)
- T. Inagaki (ORCID: https://orcid.org/0000-0003-4534-7887)
- Takashi Sugimoto (ORCID: https://orcid.org/0000-0002-1911-998X)
- K. Soutome (ORCID: https://orcid.org/0000-0003-2402-0754)
- Kazuaki Togawa (ORCID: https://orcid.org/0000-0001-7339-1733)
- Takashi Ohshima
- Toshinori Abe
- Takemasa Masuda
- T. Seike
- Sakuo Matsui
- Toru Fukui
- M. Shoji (ORCID: https://orcid.org/0009-0008-2000-7281)
Institutions
- SPring-8 (JP)
- Japan Synchrotron Radiation Research Institute (JP)
Publication Details
- Journal
- Journal of Synchrotron Radiation
- Published
- 2024-10-24
- DOI
- https://doi.org/10.1107/s1600577524008348
- Citations
- 19
- Primary Topic
- Particle Accelerators and Free-Electron Lasers
- Type
- article
- Field-Weighted Citation Impact
- 3.96