Correlation of CsK 2 Sb photocathode lifetime with antimony thickness

Mamun, M. A.; Hernandez-Garcia, C.; Poelker, M.; Elmustafa, A. A.

doi:10.1063/1.4922319

Title: Correlation of CsK ₂ Sb photocathode lifetime with antimony thickness

Abstract

CsK₂Sb photocathodes with quantum efficiency on the order of 10% at 532 nm, and lifetime greater than 90 days at low voltage, were successfully manufactured via co-deposition of alkali species emanating from an effusion source. Photocathodes were characterized as a function of antimony layer thickness and alkali consumption, inside a vacuum chamber that was initially baked, but frequently vented without re-baking. Photocathode lifetime measured at low voltage is correlated with the antimony layer thickness. Photocathodes manufactured with comparatively thick antimony layers exhibited the best lifetime. We speculate that the antimony layer serves as a reservoir, or sponge, for the alkali.

Authors:: Mamun, M. A.; Hernandez-Garcia, C.; Poelker, M.; Elmustafa, A. A.

Publication Date:: Mon Jun 01 00:00:00 EDT 2015

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1184357

Alternate Identifier(s):: OSTI ID: 1208587; OSTI ID: 1421211

Grant/Contract Number:: FG02-97ER45625; DMR-0420304

Resource Type:: Published Article

Journal Name:: APL Materials

Additional Journal Information:: Journal Name: APL Materials Journal Volume: 3 Journal Issue: 6; Journal ID: ISSN 2166-532X

Publisher:: American Institute of Physics

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Mamun, M. A., Hernandez-Garcia, C., Poelker, M., and Elmustafa, A. A. Correlation of CsK 2 Sb photocathode lifetime with antimony thickness.  United States: N. p., 2015. 
Web.  doi:10.1063/1.4922319.

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                    Mamun, M. A., Hernandez-Garcia, C., Poelker, M., & Elmustafa, A. A. Correlation of CsK 2 Sb photocathode lifetime with antimony thickness.  United States.  https://doi.org/10.1063/1.4922319

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                    Mamun, M. A., Hernandez-Garcia, C., Poelker, M., and Elmustafa, A. A. Mon .  
"Correlation of CsK 2 Sb photocathode lifetime with antimony thickness".  United States.  https://doi.org/10.1063/1.4922319.

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@article{osti_1184357,

  title        = {Correlation of CsK 2 Sb photocathode lifetime with antimony thickness},

  author       = {Mamun, M. A. and Hernandez-Garcia, C. and Poelker, M. and Elmustafa, A. A.},

  abstractNote = {CsK2Sb photocathodes with quantum efficiency on the order of 10% at 532 nm, and lifetime greater than 90 days at low voltage, were successfully manufactured via co-deposition of alkali species emanating from an effusion source. Photocathodes were characterized as a function of antimony layer thickness and alkali consumption, inside a vacuum chamber that was initially baked, but frequently vented without re-baking. Photocathode lifetime measured at low voltage is correlated with the antimony layer thickness. Photocathodes manufactured with comparatively thick antimony layers exhibited the best lifetime. We speculate that the antimony layer serves as a reservoir, or sponge, for the alkali.},

  doi          = {10.1063/1.4922319},

  journal      = {APL Materials},

  number       = 6,

  volume       = 3,

  place        = {United States},

  year         = {Mon Jun 01 00:00:00 EDT 2015},

  month        = {Mon Jun 01 00:00:00 EDT 2015}

}

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Works referenced in this record:

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Title: Correlation of CsK 2 Sb photocathode lifetime with antimony thickness

Abstract

Citation Formats

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Title: Correlation of CsK ₂ Sb photocathode lifetime with antimony thickness

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