Multi-Alkali Photocathode Development at Brookhaven National Lab for Application in Superconducting Photoinjectors

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The development of a suitable photocathode for use in a high average current photoinjector at temperatures ranging from 273 K down to 2 K is a subject of considerable interest, and active research. The choice of photocathode material is often a trade-off made based on the quantum efficiency of the cathode material, the tolerance to adverse vacuum conditions, and the laser wavelength needed to produce photoelectrons. In this paper an overview of the BNL work to date on CsK{sub 2}Sb photocathodes on a variety of substrates, irradiated at multiple wavelengths, and at temperatures down to 170 K will be discussed. ... continued below

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3 pages

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Burrill, A.; Ben-Zvi, I.; Pate, D.; Rao, T.; Segalov, Z.; /Brookhaven et al. February 15, 2006.

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The development of a suitable photocathode for use in a high average current photoinjector at temperatures ranging from 273 K down to 2 K is a subject of considerable interest, and active research. The choice of photocathode material is often a trade-off made based on the quantum efficiency of the cathode material, the tolerance to adverse vacuum conditions, and the laser wavelength needed to produce photoelectrons. In this paper an overview of the BNL work to date on CsK{sub 2}Sb photocathodes on a variety of substrates, irradiated at multiple wavelengths, and at temperatures down to 170 K will be discussed. The application of this photocathode material into a SRF photoinjector will also be discussed.

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3 pages

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  • Prepared for Particle Accelerator Conference (PAC 05), Knoxville, Tennessee, 16-20 May 2005

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  • Report No.: SLAC-PUB-11692
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 876452
  • Archival Resource Key: ark:/67531/metadc874795

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  • February 15, 2006

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 29, 2016, 8:35 p.m.

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Burrill, A.; Ben-Zvi, I.; Pate, D.; Rao, T.; Segalov, Z.; /Brookhaven et al. Multi-Alkali Photocathode Development at Brookhaven National Lab for Application in Superconducting Photoinjectors, article, February 15, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc874795/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.