Back to Search
Start Over
Temperature-dependent quantum efficiency degradation of K-Cs-Sb bialkali antimonide photocathodes grown by a triple-element codeposition method
- Source :
- Physical Review Accelerators and Beams, vol 20, iss 11, Ding, Z; Karkare, S; Feng, J; Filippetto, D; Johnson, M; Virostek, S; et al.(2017). Temperature-dependent quantum efficiency degradation of K-Cs-Sb bialkali antimonide photocathodes grown by a triple-element codeposition method. Physical Review Accelerators and Beams, 20(11). doi: 10.1103/PhysRevAccelBeams.20.113401. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/5m22w19m, Physical Review Accelerators and Beams, Vol 20, Iss 11, p 113401 (2017)
- Publication Year :
- 2017
- Publisher :
- eScholarship, University of California, 2017.
-
Abstract
- © 2017 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/" Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. K-Cs-Sb bialkali antimonide photocathodes grown by a triple-element codeposition method have been found to have excellent quantum efficiency (QE) and outstanding near-atomic surface smoothness and have been employed in the VHF gun in the Advanced Photoinjector Experiment (APEX), however, their robustness in terms of their lifetime at elevated photocathode temperature has not yet been investigated. In this paper, the relationship between the lifetime of the K-Cs-Sb photocathode and the photocathode temperature has been investigated. The origin of the significant QE degradation at photocathode temperatures over 70 °C has been identified as the loss of cesium atoms from the K-Cs-Sb photocathode, based on the in situ x-ray analysis on the photocathode film during the decay process. The findings from this work will not only further the understanding of the behavior of K-Cs-Sb photocathodes at elevated temperature and help develop more temperature-robust cathodes, but also will become an important guide to the design and operation of the future high-field rf guns employing the use of such photocathodes.
- Subjects :
- Nuclear and High Energy Physics
Materials science
Physics and Astronomy (miscellaneous)
chemistry.chemical_element
01 natural sciences
Electromagnetic radiation
Photocathode
law.invention
law
0103 physical sciences
Antimonide
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
010302 applied physics
010308 nuclear & particles physics
business.industry
Surfaces and Interfaces
Nuclear & Particles Physics
Cathode
chemistry
Caesium
Electrode
Physical Sciences
Optoelectronics
Degradation (geology)
lcsh:QC770-798
Quantum efficiency
business
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Physical Review Accelerators and Beams, vol 20, iss 11, Ding, Z; Karkare, S; Feng, J; Filippetto, D; Johnson, M; Virostek, S; et al.(2017). Temperature-dependent quantum efficiency degradation of K-Cs-Sb bialkali antimonide photocathodes grown by a triple-element codeposition method. Physical Review Accelerators and Beams, 20(11). doi: 10.1103/PhysRevAccelBeams.20.113401. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/5m22w19m, Physical Review Accelerators and Beams, Vol 20, Iss 11, p 113401 (2017)
- Accession number :
- edsair.doi.dedup.....cdcec291c71d9ffdee3c310f91b13d88