Resolving surface chemical states of p-GaN:Cs photocathodes by XPS analysis
Resolving surface chemical states of p-GaN:Cs photocathodes by XPS analysis
Schaber, J.; Xiang, R.; Arnold, A.; Teichert, J.; Ryzhov, A.; Murcek, P.; Zwartek, P.; Ma, S.; Gatzmaga, S.
An x-ray photoelectron spectrometer (XPS) is used in the HZDR photocathode lab to understand the surface states of GaN photocathodes during its cleaning, cesium activation and degradation. The XPS probes the electronic structure of the p-doped GaN photocathode after each step of the preparation process. Using energies between 1200-0 eV the core levels and auger photoemission peaks of Ga, N, O, C and Cs are monitored.
Keywords: GaN photocathode; quantum efficiency; cesium activation; photocathode degradation; organic - cesium
Involved research facilities
- Radiation Source ELBE DOI: 10.17815/jlsrf-2-58
Related publications
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 35467) publication
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Invited lecture (Conferences)
EWPAA 2022: European workshop on photocathodes for particle accelerator applications, 20.-22.09.2022, Mailand, Italien
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