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Title: RF design for the TOPGUN photogun: A cryogenic normal conducting copper electron gun

Some recent studies of rf breakdown physics in cryogenic copper X-band accelerating structures have shown a dramatic increase in the operating gradient while maintaining low breakdown rates. The TOPGUN project, a collaboration between UCLA, SLAC, and INFN, will use this improvement in gradient to create an ultra-high brightness cryogenic normal conducting photoinjector [16]. The brightness is expected to be higher by a factor of 25 relative to the LCLS photogun [9]. This improvement in the brightness will lead to increased performance of X-Ray free electron lasers (FELs) and ultrafast electron diffraction devices [16]. Here, we present the rf design for this S-band photogun, which will be a drop-in replacement for the current LCLS photogun.
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  1. Univ. of California, Los Angeles, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. National Inst. of Nuclear Physics (INFN), Frascati (Italy). Frascati National Laboratories (LNF)
Publication Date:
Grant/Contract Number:
AC02–76SF00515; SC0009914
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 865; Journal Issue: C; Journal ID: ISSN 0168-9002
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
Country of Publication:
United States
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; photoinjector; accelerator technology; electron accelerator; high brightness electron
OSTI Identifier: