Performance of Small-Gap Undulators at the SLS Intermediate Energy Storage Ring
- Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen (Switzerland)
- RIKEN/SPring-8, 1-1-1 Koutu, Mikazuki-cho, Sayo-gun, Hyogo 679-5148 (Japan)
The Swiss Light Source (SLS) at the Paul Scherrer Institut (PSI) became the first medium energy synchrotron user facility to rely on the high harmonic operation of small gap, short period undulators to extend high brightness radiation into a regime (3-18 keV) otherwise only accessible using lower brightness wigglers or operation at higher electron beam energy. Today several facilities with beam energy 2-3 GeV follow a similar route. A PSI/SPring-8 collaboration was formed to install and operate the first in-vacuum undulator shortly after commissioning of the SLS storage ring (2.4 GeV) in 2001. The goal of the joint project was to prove that high harmonic operation of small period undulators at small gaps is a valid concept to operate the PX-I beamline at 1 Aa under user operation conditions. The performance of the PX-I beamline proved to be excellent and launched the installation of meanwhile 4 new in-vacuum undulators. Having routinely operated such devices for 5 years, our experience confirms that (1) the concept of operating short period undulators (19-24 mm) on higher harmonics (11./13.) is valid, (2) reliable small gap (5-6 mm) undulator operation is feasible in the presence of top-up injection, and (3) during gap scans the photon beam can be stabilized to sub-{mu}rad precision using non-intercepting photon beam monitors.
- OSTI ID:
- 21052533
- Journal Information:
- AIP Conference Proceedings, Vol. 879, Issue 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436081; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
LUCIA - a new 1-7 keV {mu}-XAS Beamline
SPEAR 3 Design Report