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- W2133012261 abstract "A tungsten metal probe is heated in an argon plasma containing variable amounts of tungsten vapor. It is observed that the metal surface temperature substantially decreases when the vapor concentration increases in the gas. All other conditions being equal, the difference residing in the presence of metal vapor in the plasma, the introduction of about 0.7% vapor in the argon gas decreases the probe surface temperature by 18%, while the presence of 8% metal vapor decreases the surface temperature by 28%, the gas temperature around the probe surface being respectively 9000 and 10,000°K. An equation is found, showing the probe temperature variations in terms of the total tungsten particle concentration as well as the gas temperature immediately around the probe. A possible explanation is given for the phenomena observed which involves the existence of a protective shield of tungsten atoms and ions in equilibrium along the saturation vapor curve for tungsten. Also, the presence of solid condensed particles around the probe, with relatively low thermionic work function, may provide a protective, positively charged shield against positive ion bombardment of the probe. This interpretation is supported, to a certain extent, by the equation found." @default.
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- W2133012261 date "1973-01-01" @default.
- W2133012261 modified "2023-09-25" @default.
- W2133012261 title "Thermal Behavior of a Plasma-Heated Tungsten Probe in the Presence of Tungsten Vapor" @default.
- W2133012261 doi "https://doi.org/10.1149/1.2403423" @default.
- W2133012261 hasPublicationYear "1973" @default.
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