Surface Characterization of the LCLS RF Gun Cathode
Conference
·
· Conf.Proc.C100523:TUPE065,2010
OSTI ID:1044623
The first copper cathode installed in the LCLS RF gun was used during LCLS commissioning for more than a year. However, after high charge operation (> 500 pC), the cathode showed a decline of quantum efficiency within the area of drive laser illumination. They report results of SEM, XPS and XAS studies that were carried out on this cathode after it was removed from the gun. X-ray absorption and X-ray photoelectron spectroscopy reveal surface contamination by various hydrocarbon compounds. In addition they report on the performance of the second installed cathode with emphasis on the spatial distribution of electron emission.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC)
- Sponsoring Organization:
- US DOE Office of Science (DOE SC)
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1044623
- Report Number(s):
- SLAC-PUB-15116
- Journal Information:
- Conf.Proc.C100523:TUPE065,2010, Journal Name: Conf.Proc.C100523:TUPE065,2010
- Country of Publication:
- United States
- Language:
- English
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