ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Though present photoemitting cathodes have attained quantum yields, lifetimes, dark currents, and response times as required by high-luminosity accelerators, their use is hampered by their high reactivity to residual gases even in ultra-high-vacuum conditions. Ultrathin (20–200 nm) films of nanostructured sp2 carbon, directly grown on photocathodes by supersonic cluster-beam deposition, besides providing a strongly bound, inert protective coating, are shown to maintain the photoemission efficiency of clean metallic substrate cathodes. Moreover, nanostructured carbon coating is shown to induce strong nonlinearities in photoemission at high intensities, which can be explained as due to the Auger effect. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.372446
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