Space Plasma Contactor Research, 1987 PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 94
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 94
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722753023
Category :
Languages : en
Pages : 88
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A simple model describing the process of electron collection from a low pressure ambient plasma in the absence of magnetic field and contactor velocity effects is presented. Experimental measurments of the plasma surrounding the contactor are used to demonstrate that a double-sheath generally develops and separates the ambient plasma from a higher density, anode plasma located adjacent to the contactor. Agreement between the predictions of the model and experimental measurements obtained at the electron collection current levels ranging to 1 A suggests the surface area at the ambient plasma boundary of the double-sheath is equal to the electron current being collected divided by the ambient plasma random electron current density; the surface area of the higher density anode plasma boundary of the double-sheath is equal to the ion current being emitted across this boundary divided by the ion current density required to sustain a stable sheath; and the voltage drop across the sheath is determined by the requirement that the ion and electron currents counterflowing across the boundaries be at space-charge limited levels. The efficiency of contactor operation is shown to improve when significant ionization and excitation is induced by electrons that stream from the ambient plasma through the double-sheath and collide with neutral atoms being supplied through the hollow cathode. Wilbur, Paul J. Unspecified Center...
Author:
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Category :
Languages : en
Pages : 80
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Author:
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Category : Government publications
Languages : en
Pages : 1484
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1224
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 974
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Author:
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Category : Space stations
Languages : en
Pages : 652
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Author:
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ISBN:
Category : Large space structures (Astronautics)
Languages : en
Pages : 192
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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
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Category : Astronautics
Languages : en
Pages : 192
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Author: Nagendra Singh
Publisher:
ISBN:
Category : Electric contacts
Languages : en
Pages : 374
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