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• W2078696218 abstract "We have made and tested a very low energy gaseous ion source in which the plasma is established by a gaseous discharge with electron injection in an axially diverging magnetic field. A constricted arc with hidden cathode spot is used as the electron emitter (first stage of the discharge). The electron flux so formed is filtered by a judiciously shaped electrode to remove macroparticles (cathode debris from the cathode spot) from the cathode material as well as atoms and ions. The anode of the emitter discharge is a mesh, which also serves as cathode of the second stage of the discharge, providing a high electron current that is injected into the magnetic field region where the operating gas is efficiently ionized. In this discharge configuration, an electric field is formed in the ion generation region, accelerating gas ions to energy of several eV in a direction away from the source, without the use of a gridded acceleration system. Our measurements indicate that an argon ion beam is formed with an energy of several eV and current up to 2.5 A. The discharge voltage is kept at less than 20 V, to keep below ion sputtering threshold for cathode material, a feature which along with filtering of the injected electron flow, results in extremely low contamination of the generated ion flow." @default.
• W2078696218 created "2016-06-24" @default.
• W2078696218 creator A5026421215 @default.
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• W2078696218 date "2010-02-01" @default.
• W2078696218 modified "2023-09-27" @default.
• W2078696218 title "Gridless, very low energy, high-current, gaseous ion source" @default.
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• W2078696218 doi "https://doi.org/10.1063/1.3259233" @default.
• W2078696218 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20192430" @default.
• W2078696218 hasPublicationYear "2010" @default.
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