Physical Review Accelerators and Beams (Feb 2019)

Accelerator design for the Cornell High Energy Synchrotron Source upgrade

  • J. Shanks,
  • J. Barley,
  • S. Barrett,
  • M. Billing,
  • G. Codner,
  • Y. Li,
  • X. Liu,
  • A. Lyndaker,
  • D. Rice,
  • N. Rider,
  • D. L. Rubin,
  • A. Temnykh,
  • S. T. Wang

DOI
https://doi.org/10.1103/PhysRevAccelBeams.22.021602
Journal volume & issue
Vol. 22, no. 2
p. 021602

Abstract

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During the summer and fall of 2018 the Cornell High Energy Synchrotron Source (CHESS) is undergoing an upgrade to increase high-energy flux for x-ray users. The upgrade requires replacing one-sixth of the Cornell Electron Storage Ring (CESR), inverting the polarity of half of the CHESS beam lines, and switching to single-beam on-axis operation. The new sextant is comprised of six double-bend achromats (DBAs) with combined-function dipole-quadrupoles. Although the DBA design is widely utilized and well understood, the constraints for the CESR modifications make the CHESS-U lattice unique. This paper describes the design objectives, constraints, and implementation for the CESR accelerator upgrade for CHESS-U.