Jones Christopher
SUPG083
Mapping of an SRF electron gun focusing solenoid assembly
SLAC’s LCLS-II-HE upgrade will expand the energy regime of their XFEL at high repetition rates. Due to the low emittance requirement, a superconducting QWR based electron gun was proposed by SLAC and is being developed by FRIB in collaboration with ANL and HZDR. The emittance compensation solenoid consists of two main coils, along with horizontal and vertical dipoles as well as normal and skew quadrupole correctors. To validate the performance and characterize the field profile of the magnet, we developed a mapper system. We utilized a SENIS 3D Hall probe on a cantilevered rail driven by an Arduino controlled stepper motor. With high repeatability, we were able to measure peak field strengths and fall off. Further data analysis allowed us to determine their relative locations, in addition to confirming alignment and integrated field strengths. In accordance with design specifications, we measured the peak solenoid fields to be about 172mT and their centers to be less than 0.1mm apart transversely. The mapping design, assembly, process, analysis, and lessons learned are discussed herein.
  • C. Jones, H. Nguyen, X. Du
    Facility for Rare Isotope Beams, Michigan State University
  • C. Adolphsen, J. Smedley
    SLAC National Accelerator Laboratory
  • J. Lewellen
    Los Alamos National Laboratory
  • J. Wenstrom
    Michigan State University
  • T. Xu, Y. Choi
    Facility for Rare Isotope Beams
Cite: reference for this paper using: BibTeX, LaTeX, Text/Word, RIS, EndNote