Full Energy Injection and Top-up Operation at UVSOR-II

Journal Article · Wed Jun 23 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3463259· OSTI ID:21410284

Katoh, Masahiro; Adachi, Masahiro; Zen, Heishun; Mochihashi, Akira; Shimada, Miho; Hosaka, Masahito ^[1]; Yamazaki, Jun-ichiro; Hayashi, Kenji ^[1]

---

1. UVSOR Facility, Institute for Molecular Science, National Institute of Natural Sciences, 38 Nishigo-naka, Myodaiji, Okazaki, 444-8585 (Japan)

Top-up operation was successfully demonstrated at UVSOR-II, which will remove the short beam-lifetime problem caused by strong Touschek effect due to the small emittance, 27 nm-rad, and the low electron energy, 750 MeV. In these years, we have improved the accelerators, step by step, towards top-up operation. The radiation shielding wall was reconstructed. The energy of the booster synchrotron and the beam transport line were successfully upgraded from 600 MeV to 750 MeV, by replacing the magnet power supplies in 2006. Soon after, we succeeded in injecting the electron beam at the full energy. We improved the radiation safety system and constructed a injection control system. In autumn, 2008, we succeeded in operating the ring for 12 hours as keeping the beam current quasi-constant at 300 mA. Currently, we operated the ring in the top-up mode for 12 hours on every Thursday night, to check the effects on the users' experiments. In 2009, we have succeeded in the top-up operation in single bunch mode. Free electron laser oscillation with the top-up mode was also successfully demonstrated.

• OSTI ID: 21410284
• Journal Information: AIP Conference Proceedings, Vol. 1234, Issue 1; Conference: SRI 2009: 10. international conference on radiation instrumentation, Melbourne (Australia), 27 Sep - 2 Oct 2009; Other Information: DOI: 10.1063/1.3463259; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM CURRENTS
BEAM TRANSPORT
CONTROL SYSTEMS
ELECTRON BEAMS
ELECTRONS
FREE ELECTRON LASERS
INJECTION
LIFETIME
LINEAR ACCELERATORS
MAGNETS
MEV RANGE 100-1000
OSCILLATIONS
RADIATION PROTECTION
RINGS
SYNCHROTRON RADIATION
SYNCHROTRONS
ACCELERATORS
BEAMS
BREMSSTRAHLUNG
CURRENTS
CYCLIC ACCELERATORS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
EQUIPMENT
FERMIONS
INTAKE
LASERS
LEPTON BEAMS
LEPTONS
MEV RANGE
PARTICLE BEAMS
RADIATIONS