Theory and Measurements for Ion Collection by a Spherical Probe in a Collisional Plasma

Following a discussion of existing probe theories for a collisional plasma, a new theory is given for ion collection by a spherical probe in a collisional plasma which goes over to the collisionless theory of Allen et al. at low pressures and the continuum theory of Su and Lam at high pressures. Num...

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Veröffentlicht in:	Phys. Fluids, 11: 1532-45(July 1968) 11: 1532-45(July 1968), 1968-07, Vol.11 (7), p.1532-1545
Hauptverfasser:	Self, S. A., Shih, C. H.
Format:	Artikel
Sprache:	eng
Schlagworte:	COLLISIONS CURRENTS ELECTRIC PROBES/use of spherical, for ion collection in collisional plasma, (E/T) IONS N32820 -Physics-Controlled Thermonuclear Research- Diagnostics PLASMA PLASMA DIAGNOSTICS PLASMA/diagnostics of collisional, spherical probe analysis for, (E/T) PROBES SPHERES
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creator	Self, S. A. Shih, C. H.
description	Following a discussion of existing probe theories for a collisional plasma, a new theory is given for ion collection by a spherical probe in a collisional plasma which goes over to the collisionless theory of Allen et al. at low pressures and the continuum theory of Su and Lam at high pressures. Numerical results are given in a form suitable for interpretation of experimental data. Experimental probe studies in the positive column (1 cm diameter) of a He discharge in the pressure range 0.05‐0.4 Torr are described and the use of the electron and ion saturation methods for determining plasma concentration compared with one another and with a microwave cavity perturbation method. The limitations of the theories and experimental methods are discussed.
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H.</creatorcontrib><creatorcontrib>Stanford Univ., Calif</creatorcontrib><title>Theory and Measurements for Ion Collection by a Spherical Probe in a Collisional Plasma</title><title>Phys. Fluids, 11: 1532-45(July 1968)</title><description>Following a discussion of existing probe theories for a collisional plasma, a new theory is given for ion collection by a spherical probe in a collisional plasma which goes over to the collisionless theory of Allen et al. at low pressures and the continuum theory of Su and Lam at high pressures. Numerical results are given in a form suitable for interpretation of experimental data. Experimental probe studies in the positive column (1 cm diameter) of a He discharge in the pressure range 0.05‐0.4 Torr are described and the use of the electron and ion saturation methods for determining plasma concentration compared with one another and with a microwave cavity perturbation method. The limitations of the theories and experimental methods are discussed.</description><subject>COLLISIONS</subject><subject>CURRENTS</subject><subject>ELECTRIC PROBES/use of spherical, for ion collection in collisional plasma, (E/T)</subject><subject>IONS</subject><subject>N32820 -Physics-Controlled Thermonuclear Research- Diagnostics</subject><subject>PLASMA</subject><subject>PLASMA DIAGNOSTICS</subject><subject>PLASMA/diagnostics of collisional, spherical probe analysis for, (E/T)</subject><subject>PROBES</subject><subject>SPHERES</subject><issn>0031-9171</issn><issn>2163-4998</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1968</creationdate><recordtype>article</recordtype><recordid>eNp9kEFLAzEQhYMoWKsH_0HwprA1k2SzzVGK1UJFwYrHkM3O0sh2U5L10H9vlvYsw2OGx8djZgi5BTYDpsQjzEBpDkKfkQkHJQqp9fycTBgTUGio4JJcpfTDGJcgxYR8b7YY4oHavqFvaNNvxB32Q6JtiHQVeroIXYdu8HmsM0Y_91uM3tmOfsRQI_V9NkfIp8yMdmfTzl6Ti9Z2CW9OfUq-ls-bxWuxfn9ZLZ7WhRNlNRROYtOwBkStXclZ5aABlQvVqFpXmtlKla5tRcN1k6VRlRoB-ByZlGJK7o65IQ3eJOcHdFsX-j7vbGQJVcVVhu6PkIshpYit2Ue_s_FggJnxbQbM6W2ZfTiyY5Yd7_4H_gNlKmtr</recordid><startdate>196807</startdate><enddate>196807</enddate><creator>Self, S. 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Numerical results are given in a form suitable for interpretation of experimental data. Experimental probe studies in the positive column (1 cm diameter) of a He discharge in the pressure range 0.05‐0.4 Torr are described and the use of the electron and ion saturation methods for determining plasma concentration compared with one another and with a microwave cavity perturbation method. The limitations of the theories and experimental methods are discussed.</abstract><doi>10.1063/1.1692139</doi><tpages>14</tpages></addata></record>
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subjects	COLLISIONS CURRENTS ELECTRIC PROBES/use of spherical, for ion collection in collisional plasma, (E/T) IONS N32820 -Physics-Controlled Thermonuclear Research- Diagnostics PLASMA PLASMA DIAGNOSTICS PLASMA/diagnostics of collisional, spherical probe analysis for, (E/T) PROBES SPHERES
title	Theory and Measurements for Ion Collection by a Spherical Probe in a Collisional Plasma
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