Measurements of current intensities from 10-18 A to 10-6 A emitted from niobium samples under high dc electric fields

Mustapha Boussoukaya; Aline Curtoni; Anne Zeitoun-Fakiris

doi:10.1117/12.174628

1 May 1994 Measurements of current intensities from 10^-18 A to 10^-6 A emitted from niobium samples under high dc electric fields

Mustapha Boussoukaya, Aline Curtoni, Anne Zeitoun-Fakiris

Author Affiliations +

Proceedings Volume 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum; (1994) https://doi.org/10.1117/12.174628
Event: XVI International Symposium on Discharges and Electrical Insulation in Vacuum, 1994, Moscow-St. Petersburg, Russian Federation

Abstract

An experimental set-up allowing measurements of DC field emission currents in the range of 10^-18 A to 10^-6 A in ultra high vacuum (P < 10^-10 Torr) at room temperature has been developed. The detection of currents in the range of 10^-18 A to 10^-12 A was carried out with an electron multiplier located behind a grid anode. Higher currents were measured using a massive anode and a picoammeter. The whole system was designed to study niobium samples from sheets used to build electron superconducting accelerator cavities. Comparisons of the electron field emission from samples prepared by different surface treatments as chemical etching, electropolishing, oxide coating by anodization, were done. Some of the obtained results are presented below.

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Mustapha Boussoukaya, Aline Curtoni, and Anne Zeitoun-Fakiris "Measurements of current intensities from 10^-18 A to 10^-6 A emitted from niobium samples under high dc electric fields", Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); https://doi.org/10.1117/12.174628

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