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München 2009 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 81: Beschleunigerphysik 4

T 81.4: Vortrag

Donnerstag, 12. März 2009, 17:35–17:50, A213

Magnetic field transients in superconductive undulators — •Sandra Ehlers1, Axel Bernhard1, Golo Fuchert1, Peter Peiffer1, Robert Rossmanith2, Daniel Schörling3, Daniel Wollmann1, and Tilo Baumbach11Lab. für Applikationen der Synchrotronstrahlung, Universität Karlsruhe, Deutschland — 2Inst. für Synchrotronstrahlung, Forschungszentrum Karlsruhe, Deutschland — 3TU Bergakademie Freiberg, Deutschland

The next step towards introducing superconductive undulators as the new generation of insertion devices is to understand the impact of dynamic effects in the superconducting coils on the accelerator beam. These effects are seen as a temporal drift of the beam orbit, originating from transients of the magnetic field. The first systematic time resolved measurements of such drifts have been performed ANKA. Orbit displacement during several different ramping cycles, for different ramp rates and relaxation times, has been investigated.

This contribution summarises the results of the measurements. The persistent current effects in the superconducting wires, as well as eddy currents in the yoke are discussed as possible sources for the transients.

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