DocumentCode
2895543
Title
Dynamic multipole shimming of the APPLE undulator UE112
Author
Bahrdt, J. ; Frentrup, W. ; Gaupp, A. ; Scheer, M. ; Wuestefeld, G.
Author_Institution
BESSY, Berlin
fYear
2007
fDate
25-29 June 2007
Firstpage
941
Lastpage
943
Abstract
The dynamic multipoles of the BESSY APPLE undulator UE112 have successfully been shimmed for the elliptical mode using Fe-shims. In the inclined mode the multipoles have to be minimized actively. This can be accomplished either with an array of flat current wires or with rotating permanent magnets. Both methods are compared with respect to accuracy, flexibility and complexity. For both strategies the dynamic properties of the device have been studied in tracking simulations which are based on a generating function formalism using an analytic description of the undulator and the shim field integrals.
Keywords
electron accelerators; particle beam dynamics; permanent magnets; storage rings; wigglers; BESSY APPLE undulator UE112; dynamic multipole shimming; dynamic properties; elliptical mode; flat current wires; function formalism; permanent magnets; shim field integrals; Analytical models; Apertures; Electron beams; Iron; Magnetic analysis; Permanent magnets; Shape; Solids; Undulators; Wires;
fLanguage
English
Publisher
ieee
Conference_Titel
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location
Albuquerque, NM
Print_ISBN
978-1-4244-0916-7
Type
conf
DOI
10.1109/PAC.2007.4440942
Filename
4440942
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