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Title: Current Status of the SAGA Light Source Commissioning

Abstract

The SAGA Light Source (SAGA-LS) is the third-generation synchrotron light source designed, constructed and operated by Saga Prefecture, the Japanese local government, for the promotion of scientific researches and industrial applications in Kyushu area. The SAGA-LS consists of a 250-MeV electron linac injector and a 1.4-GeV storage ring with eight double-bend (DB) cell and eight 2.93-m long straight sections. The DB cell structure with a distributed dispersion system was chosen to produce a compact and low cost ring of 75.6-m long circumference. The construction budget was 1.94 billion yen for the light source and 1.1 billion yen for the building. The machine installation started on September 29, 2003. The commissioning began on August 24, 2004. The first synchrotron light was observed on November 12. The commissioning goal of 1.4GeV-100mA was achieved on August 25, 2005. The SAGA-LS was opened for users in February 17, 2006.

Authors:
; ; ; ;  [1];  [2]
  1. SAGA Light Source, Tosu, 841-0005 (Japan)
  2. Institute of Advanced Energy, Kyoto, 611-0011 (Japan)
Publication Date:
OSTI Identifier:
21043382
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436036; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; COMMISSIONING; ELECTRONS; GEV RANGE; JAPANESE ORGANIZATIONS; LIGHT SOURCES; LINEAR ACCELERATORS; MEV RANGE; STORAGE RINGS; SYNCHROTRON RADIATION

Citation Formats

Tomimasu, T., Koda, S., Iwasaki, Y., Takabayashi, Y., Yoshida, K., and Ohgaki, H. Current Status of the SAGA Light Source Commissioning. United States: N. p., 2007. Web. doi:10.1063/1.2436036.
Tomimasu, T., Koda, S., Iwasaki, Y., Takabayashi, Y., Yoshida, K., & Ohgaki, H. Current Status of the SAGA Light Source Commissioning. United States. doi:10.1063/1.2436036.
Tomimasu, T., Koda, S., Iwasaki, Y., Takabayashi, Y., Yoshida, K., and Ohgaki, H. Fri . "Current Status of the SAGA Light Source Commissioning". United States. doi:10.1063/1.2436036.
@article{osti_21043382,
title = {Current Status of the SAGA Light Source Commissioning},
author = {Tomimasu, T. and Koda, S. and Iwasaki, Y. and Takabayashi, Y. and Yoshida, K. and Ohgaki, H.},
abstractNote = {The SAGA Light Source (SAGA-LS) is the third-generation synchrotron light source designed, constructed and operated by Saga Prefecture, the Japanese local government, for the promotion of scientific researches and industrial applications in Kyushu area. The SAGA-LS consists of a 250-MeV electron linac injector and a 1.4-GeV storage ring with eight double-bend (DB) cell and eight 2.93-m long straight sections. The DB cell structure with a distributed dispersion system was chosen to produce a compact and low cost ring of 75.6-m long circumference. The construction budget was 1.94 billion yen for the light source and 1.1 billion yen for the building. The machine installation started on September 29, 2003. The commissioning began on August 24, 2004. The first synchrotron light was observed on November 12. The commissioning goal of 1.4GeV-100mA was achieved on August 25, 2005. The SAGA-LS was opened for users in February 17, 2006.},
doi = {10.1063/1.2436036},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • The SAGA Light Source (SAGA-LS) is a synchrotron radiation facility consisting of a 255 MeV injector linac and a 1.4 GeV storage ring that is 75.6 m in circumference. The SAGA-LS has been stably providing synchrotron radiation to users since it first started user operation in February 2006. Along with the user operation, various machine improvements have been made over the past years, including upgrading the injector linac control system, replacing a septum magnet and constructing a beam diagnostic system. In addition to these improvements, insertion devices have been developed and installed. An APPLE-II type variable polarization undulator was installedmore » in 2008. To address the demand from users for high-flux hard x-rays, a superconducting 4 T class wiggler is being developed. An experimental setup for generating MeV photons by laser Compton scattering is being constructed for beam monitoring and future user experiments.« less
  • Since there are no iron cores in the rotor and stator windings of superconducting synchronous motors, some reactances are intrinsically smaller than the ones of conventional motors. So the low synchronous reactance would be expected to improve the torque-ampere ratio stability and the overload capacity. Two types of 30-kVA synchronous motors, such as rotating armature and rotating field have been constructed. The rotating armature type motor had been fabricated and tested. The results show the difficulty of holding a stator cryostat in a low-heat leak condition. The low synchronous impedance requires some control of the armature current and/or the motormore » field current. The rotating field type motor encountered a balancing problem due to the triple-pipe configuration of the helium supplier in the torque tube.« less
  • Saga prefectural government operates a synchrotron light facility mainly for industrial applications of the synchrotron light. The facility comprises a 1.4 GeV storage ring, a 250 MeV linac as an electron injector and beamlines. The lattice of the storage ring is designed to perform as small emittance as 25 nm-radian and has long straight sections of 2.9 m length for installing insertion devices. Three beam lines have been prepared by Saga prefectural government and one by Saga University.
  • Saga Light Source (SAGA-LS), which has been constructed at Tosu city in Saga prefecture, is a compact synchrotron light source with storage electron energy of 1.4 GeV. A new beamline for the development of advanced materials and processing has been designed, and is now under construction at BL9 of SAGA-LS. This beamline is one of the three bending magnet beamlines (BL9, BL12, and BL15) constructed by Saga Prefectural Government. In this paper, we describe the design and the expected optical performance of the beamline BL9 at SAGA-LS.
  • A new X-ray beamline has been designed and constructed at SAGA Light Source. The beamline, named BL15, covers an energy range from 2.1 to 14.2 keV and is intended for the characterization of various materials developed for industrial purposes. The beamline has an experimental station for the performance of several experiments: e.g. X-ray absorption fine structure (XAFS) measurement; high resolution diffractometry; topographic imaging; energy-dispersive four-circle diffractometry. The photon flux passing through a receiving slit at XAFS measurement position is more than 1 x 1011 photons/sec with focusing mirror in the energy range of less than 8keV. The XANES spectra measurementsmore » of Cu and Ti K-edge show that the beamline has a good energy resolution.« less