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AbstractAbstract
[en] We have developed an activation procedure by which the reactivity to CO2, a principal cause of yield decay for GaAs photocathodes, is greatly reduced. The use of a second alkali in the activation process is responsible for the increased immunity of the activated surface. The best immunity was obtained by using a combination of Cs and Li without any loss in near bandgap yield. Optimally activated photocathodes have nearly equal quantities of both alkalis.
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25 Aug 2010; 16 p; AC02-76SF00515; Available from http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-14129.html; PURL: https://www.osti.gov/servlets/purl/992982-MKCp6P/
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