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Superconducting Undulators With Variable Polarization and Enhanced Spectral Range

  • Author(s): Prestemon, S
  • Schlueter, R
  • Marks, S
  • Dietderich, DR
  • et al.
Abstract

A concept utilizing superconducting magnets for variable polarization insertion devices is presented. The iron-free design enables full variable linear and elliptical polarization over a broad spectral range. With appropriate electrical switching the same device can access higher energies through period-halving, while continuing to provide variable-linear polarization; furthermore, separate switching will allow for period-doubling with full linear and elliptical polarization control. The performance, both in terms of field/spectral performance and in terms of polarization control, is compared to existing permanent magnet EPU devices. Engineering issues associated with the fabrication and implementation of the device are discussed.

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