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Stability of Field Emitter Arrays to Oxygen Exposures

The purpose of these experiments was to determine the degradation mechanisms of molybdenum based field emitter arrays to oxygen exposures and to improve the overall reliability. In addition, we also evaluated the emission current stability of gold-coated field emitter arrays to oxygen exposures. oxygen at 1x10-6 torr was introduced into the chamber through a leak valve for different lengths of time and duty cycles.
To ensure identical oxygen exposure and experimental measurement conditions, tips on half the area of the FEA were fully coated with gold and the other half were left uncoated. The emission current from the gold coated half was found to degrade much less than that from the uncoated half, in the presence of oxygen. Also in the absence of oxygen, the emission current recovery for the gold-coated side was much quicker than that for the uncoated side.

Identiferoai:union.ndltd.org:unt.edu/info:ark/67531/metadc3346
Date12 1900
CreatorsGodbole, Soumitra Kumar
ContributorsGnade, Bruce, Wallace, Robert M., Bouanani, Mohamed El, Fanelli, Michael
PublisherUniversity of North Texas
Source SetsUniversity of North Texas
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation
FormatText
RightsPublic, Copyright, Godbole, Soumitra Kumar, Copyright is held by the author, unless otherwise noted. All rights reserved.

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