Preparing the BESSY APPLE Undulators for Top-Up Operation

Journal Article · Fri Jan 19 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2436063· OSTI ID:21043434

Bahrdt, J; Frentrup, W; Gaupp, A; Scheer, M ^[1]

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1. BESSY GmbH, Albert-Einstein-str. 15, 12489 Berlin (Germany)

BESSY plans to go to topping up operation in the near future. A high injection efficiency is essential to avoid particle losses inside the undulator magnets and to ensure a low radiation background in the beamlines. Dynamic and static multipoles of the insertion devices have to be minimized to accomplish this requirement. APPLE II devices show strong dynamic multipoles in the elliptical and vertical polarization mode. Measurements before and after shimming of these multipoles are presented. The static multipoles of the BESSY UE56-2 which are due to systematic block inhomgeneities have successfully been shimmed recovering the full dynamic aperture.

• OSTI ID: 21043434
• 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: 10.1063/1.2436063; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
APERTURES
BEAM INJECTION
BESSY STORAGE RING
EFFICIENCY
MULTIPOLES
OPERATION
PARTICLE LOSSES
POLARIZATION
WIGGLER MAGNETS