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

Journal Article · Wed Aug 31 00:00:00 EDT 2016 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI: https://doi.org/10.1016/j.nima.2016.08.062 · OSTI ID:1390730

Cahill, A. D. ^[1]; Fukasawa, A. ^[1]; Pakter, R. ^[1]; Rosenzweig, J. B. ^[1]; Dolgashev, V. A. ^[2]; Limborg-Deprey, C. ^[2]; Tantawi, S. ^[2]; Spataro, B. ^[3]; Castorina, G. ^[3]

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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)

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.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-76SF00515; SC0009914
• OSTI ID: 1390730
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: C Vol. 865; ISSN 0168-9002
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English