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- W2151142809 abstract "FEM- and AES-investigations show that the long time stability of field emission from metals is determined more by corrosive surface reactions than by simple gas adsorption or cathode sputtering. Corrosion is produced by H2O or organic vapours, but also by CO, even with partial pressures <10−10 Torr. Bombardment of corrosion layers with secondary ions has two striking effects: 1. The layers are reduced as shown by AES; therefore field emission has a cleaning effect for the cathode. 2. With heavily corroded surfaces there occur strong emission pulses. They are connected with the appearance of “molecular patterns” in the FEM, and with micro-discharges in vacuum gaps. Untersuchungen mit FEM und AES zeigen, daß sich das Restgas auf die Langzeitstabilität der Feldemission von Metallen in höherem Maße durch Oberflächenkorrosion auswirkt, als durch einfache Gasadsorption oder Katodenzerstäubung. Korrosion wird von H2O und von organischen Dämpfen verursacht, aber auch von CO, bereits bei Partialdrücken <10−10 Torr. Beschuß der Korrosionsschichten mit Sekundärionen hat zwei auffällige Auswirkungen: 1. Die Schichten werden teilweise zerstört, wie AES-Messungen deutlich zeigen. Deshalb hat die Feldemission eine Reinigungswirkung auf die Katode. 2. Bei starker Korrosion treten impulsförmige Emissionsinstabilitäten auf. Sie äußern sich als „Molekülbilder”︁ in FEM und als Mikroentladungen in Vakuumstrecken." @default.
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- W2151142809 date "1975-02-16" @default.
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- W2151142809 title "Stability of Field Electron Emission and Vacuum Breakdown. Investigations with Field Emission Microscopy and Auger Electron Spectroscopy" @default.
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- W2151142809 doi "https://doi.org/10.1002/pssa.2210270211" @default.
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