A selfconsistent twofluid model of a magnetized plasmawall transition
A selfconsistent onedimensional twofluid model of the magnetized plasmawall transition is presented. The model includes magnetic field, elastic collisions between ions and electrons, and creation/annihilation of charged particles. Two systems of differential equations are derived. The first system describes the whole magnetized plasmawall transition region, which consists of the presheath, the magnetized presheath (Chodura layer), and the sheath, which is not neutral, but contains a positive space charge. The second system of equations describes only the neutral part of the plasmawall transition region—this means only the presheath and the Chodura layer, but not also the sheath. Both systems are solved numerically. The first system of equations has two singularities. The first occurs when ion velocity in the direction perpendicularly to the wall drops below the ion thermal velocity. The second occurs when the electron velocity in the direction perpendicularly to the wall exceeds the electron thermal velocity. The second system of differential equations only has one singularity, which has also been derived analytically. For finite electron to ion mass ratio, the integration of the second system always breaks down before the Bohm criterion is fulfilled. Some properties of the first system of equations are examined. It is shown that themore »
 Authors:

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 University of Ljubljana, Faculty of Electrical Engineering, Tržaška 25, 1000 Ljubljana (Slovenia)
 (Slovenia)
 Jožef Stefan Institute, Jamova 39, P.O. Box 100, 1000 Ljubljana (Slovenia)
 Publication Date:
 OSTI Identifier:
 22493784
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANNIHILATION; BOHM CRITERION; DEBYE LENGTH; DIFFERENTIAL EQUATIONS; ELECTRON COLLISIONS; ELECTRONS; ION ACOUSTIC WAVES; ION COLLISIONS; IONS; LARMOR RADIUS; MAGNETIC FIELDS; ONEDIMENSIONAL CALCULATIONS; PLASMA; SINGULARITY; SPACE CHARGE; VELOCITY; WALLS