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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.