Effective removal of field-emitting sites from metallic surfaces by dry ice cleaning
作者： Detlef Reschke , Klaus Floettmann , Xenia Singer , Arti Dangwal , Günter Müller
DOI: 10.1063/1.2772505
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摘要: Systematic results of the field emission properties polycrystalline copper and niobium single-crystal Nb are reported. Dry ice cleaning (DIC) is found to suppress enhanced from metallic surfaces. The effect on emitting sites was investigated by means scanning microscopy up fields 250 MV/m high-resolution electron with energy dispersive x-ray analysis. number density emitters at given drastically reduced dry cleaning. Current-voltage measurements derived Fowler-Nordheim parameters partially discussed respect morphology impurity content localized emitters. No grain boundaries large-grain samples observed. prove effective removal field-emitting particulates down 400 nm as well partial smoothing surface protrusions DIC.
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