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T: Fachverband Teilchenphysik

T 82: Quellen / Injektoren

T 82.10: Talk

Monday, March 28, 2011, 19:00–19:15, 30.22: 020

Phase error reduction in superconductive undulators using induction shimming — •Sandra Ehlers¹, Axel Bernhard¹, Florian Burkart¹, Peter Peiffer¹, Robert Rossmanith¹, Tilo Baumbach¹, Daniel Schoerling², and Daniel Wollmann² — ¹Karlsruhe Institute of Technology, Germany — ²CERN, Switzerland

As shown in a first proof of principle experiment, induction shimming can constitute a simple and efficient method of increasing the field quality of superconductive undulators. Although previous measurements on a single undulator half were successful in giving a qualitative understanding on hystetersis in the shim coils, it was found that the measurement setup needs improvement for meaningful calculations of the phase error reduction. Presented here are the first results on phase error reduction with induction shimming, using a measurement setup with improved accuracy. Theoretical results on the coupling between shim coils, important for the function of the shim system and for an extension to full length undulators, are also presented in this contribution.