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Descripción
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| A fluid model of a magnetized source-driven plasma is discussed for regimes with Debye lengthion Larmor radiusplasma size and collisional mean-free path. Plasma collection by the wall is determined in terms of angle of incidence, magnetic strength, and plasma collisionality. For nonparallel incidence, a three-scale asymptotic analysis reveals a three-region matched structure consisting of a magnetically aligned bulk region, the Chodura layer, and the Debye sheath. Sonic Chodura and Bohm conditions define the singular region transitions. For near-parallel incidence, a separate analysis demonstrates the presence of a diffusive-collisional bulk region followed by a thin collisionless layer, which differs partially from the Chodura layer. A parametric analysis unveils the presence of four regimes depending on plasma collisionality: 1 a collisionless regime, with the magnetically channeled bulk region governed by plasma production; 2 a resistive semicollisional regime, where collisions retard the plasma transport in the bulk region; 3 a diffusive semicollisional regime, where the EB drift dominates the ion flux in the bulk region; and 4 a collisional regime, where collisions cancel out magnetic effects. At grazing incidence, plasma collection is found to vary nonmonotonically with plasma collisionality. Nonzero Debye-length effects are discussed briefly. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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PHYSICS OF PLASMAS |
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ISSN
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1070-664X |
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Factor de impacto JCR
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2,427 |
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Información de impacto
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Volumen
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16 |
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DOI
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Número de revista
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0 |
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