Atomic hydrogen cleaning of polarized GaAs photocathodes

T. Maruyama, D. A. Luh, A. Brachmann, J. E. Clendenin, E. L. Garwin, S. Harvey, R. E. Kirby, C. Y. Prescott, R. Prepost

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13 Scopus citations

Abstract

The preparation of polarized, negative electron affinity GaAs photocathodes was discussed. The photocathode was prepared using atomic hydrogen cleaning followed by heat cleaning at 450°C. Quantum efficiencies of 15% were obtained for the GaAs cathodes, when hydrogen ions were eliminated. Low temperature cleaning technique was applied for producing highly polarized electrons.

Original languageEnglish
Pages (from-to)4184-4186
Number of pages3
JournalApplied Physics Letters
Volume82
Issue number23
DOIs
StatePublished - 9 Jun 2003

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