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Title: Vacuum system design, construction, and operation for the Cornell High Energy Synchrotron Source upgrade

Journal Article · · Vacuum
ORCiD logo [1];  [1];  [1];  [1];  [2];  [1]
  1. Cornell Univ., Ithaca, NY (United States). Cornell Lab. of Accelerator-Based Sciences and Education, Wilson Lab.
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
+ Show Author Affiliations

During the summer and fall 2018, the Cornell High Energy Synchrotron Source (CHESS), underwent an upgrade that recast the facility as primarily a low emittance X-ray source. The upgrade replaced one sixth of the Cornell Electron Storage Ring (CESR) with six double-bend achromats, featuring four novel CHESS Compact Undulator (CCU) insertion devices, and switched CESR to single particle beam operation. At the time of this writing, the upgraded storage ring has achieved the CHESS-U design goal of operating with 200 mA of positron current at 6.0 GeV beam energy. Additionally, seven out of eleven CHESS-U beamlines are currently in X-ray user operation. The construction and the commissioning of the new section of the CESR accelerator required novel solutions to design, fabrication, and vacuum system operations. Significant design considerations and efforts were made to minimize X-ray ‘dark-time’, returning to operation less than 1 year. This paper describes the important milestones of the process, the solutions implemented, and the present status of CHESS-U.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1774956
Journal Information:
Vacuum, Vol. 186; ISSN 0042-207X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

43 PARTICLE ACCELERATORS
UHV
particle accelerators
synchrotron light sources
vacuum simulation
photon-induced desorption