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Publication

SURFACE STUDIES OF PLASMA PROCESSED Nb SAMPLES...

Publication Type
Conference Paper
Publication Date
Conference Name
SRF 2015
Conference Location
Whistler, Canada
Conference Sponsor
Triumf
Conference Date
-

Contaminants present at top surface of superconducting radio frequency (SRF) cavities can act as field emitters and restrict the cavity accelerating gradient. A room temperature in-situ plasma processing technology for SRF cavities aiming to clean hydrocarbons from inner surface of cavities has been recently developed at the Spallation Neutron Source (SNS). Surface studies of the plasma processed Nb samples by Secondary ion mass spectrometry (SIMS) and Scanning Kelvin Probe (SKP) showed that the NeO2 plasma processing is very effective to remove carbonaceous contaminants from top surface and improves the surface work function up to 0.6 eV.