Physical Review Accelerators and Beams (Oct 2024)

Experimental results of a YBCO bulk superconducting undulator magnetic optimization

  • Marco Calvi,
  • Alexandre Arsenault,
  • Xiaoyang Liang,
  • Thomas Schmidt,
  • Anthony R. Dennis,
  • John H. Durrell,
  • Carlos Gafa,
  • Andrew Sammut,
  • Nicholas Sammut,
  • Mark D. Ainslie,
  • Ryota Kinjo,
  • Kai Zhang,
  • Sebastian Hellmann

DOI
https://doi.org/10.1103/PhysRevAccelBeams.27.100702
Journal volume & issue
Vol. 27, no. 10
p. 100702

Abstract

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The magnetic field optimization of RE-Ba-Cu-O (REBCO, RE=rare earth) bulk superconducting undulators is a fundamental step toward their implementation in an accelerator driven photon source, like a synchrotron or a free electron laser. In this article, we propose a sorting algorithm to reduce the undulator’s phase error based on the reconstruction of the trapped current inside the bulks of a staggered array undulator. The results obtained with a YBCO short prototype field-cooled down to 10 K in a 10 T magnetic field are reported. Finally, its performance is critically discussed in light of 2D magnetic field maps of its individual components, obtained at LN_{2} after the magnetization tests.