IPAC'10 - List of Authors (Keilmann, A.)

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Keilmann, A.

Paper	Title	Page
WEPD016	Reduction of Dynamic Field Errors in Superconductive Undulators	3120
	P. Peiffer, A. Bernhard, F. Burkart, S. Ehlers, A. Keilmann KIT, Karlsruhe T. Baumbach, R. Rossmanith Karlsruhe Institute of Technology (KIT), Karlsruhe D. Schoerling CERN, Geneva
	In the superconductive undulator SCU14, installed at ANKA, time dependent drifts in the magnetic fields were observed. Simulations with the software OPERA 3D showed, that the cause of these drifts might be leak and eddy currents in the iron body of the undulator caused by the time-varying currents and fields during current ramps, which slowly decay by ohmic losses. This assumption was crosschecked by measurements at different mockup bodies. This contribution discusses the results of the simulations and measurements and the consequential strategies for avoiding this effect. S. Ehlers et. al. "Magnetic field transients in superconductive undulators", in Proceedings of the Particle Accelerator Conference, Vancouver, 2009, to be published.

Paper

Title

Page

WEPD016

Reduction of Dynamic Field Errors in Superconductive Undulators

3120

P. Peiffer, A. Bernhard, F. Burkart, S. Ehlers, A. Keilmann
KIT, Karlsruhe
T. Baumbach, R. Rossmanith
Karlsruhe Institute of Technology (KIT), Karlsruhe
D. Schoerling
CERN, Geneva

In the superconductive undulator SCU14, installed at ANKA, time dependent drifts in the magnetic fields were observed*. Simulations with the software OPERA 3D showed, that the cause of these drifts might be leak and eddy currents in the iron body of the undulator caused by the time-varying currents and fields during current ramps, which slowly decay by ohmic losses. This assumption was crosschecked by measurements at different mockup bodies. This contribution discusses the results of the simulations and measurements and the consequential strategies for avoiding this effect.

* S. Ehlers et. al. "Magnetic field transients in superconductive undulators", in Proceedings of the Particle Accelerator Conference, Vancouver, 2009, to be published.