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- W2183659587 abstract "To investigate the effect of an oblique end-plate on the transition layer between a plasma and an absorbing wall, we measured the space potential, the electron density, and electron temperature at the end-plate in a magnetized sheet plasma as the boundarylike plasma. The end plate rotates round x axis which is in the direction of the thickness of sheet plasma, or round y axis which is in the direction of the width of sheet plasma. The scale of the length and the potential drop of the magnetic presheath at the rotation round y axis are larger than those at the rotation round x axis. 1. Introduction The transport of charged particles along with the magnetic field lines dispersed at the walls is important for the researches on the laboratory plasma, divertor plasma and so on. In particular, when a conducting wall is placed at an angle to the magnetic field, the particle diffusion toward the wall deviates markedly from the uniformity by the effects of the electric field, the density and the temperature gradients. Such imbalance is expected to give a remarkable effects on plasma parameters, the edge potential [1-3] and particle flow along the magnetic field. In the magnetic field intersecting the surface at a shallow angle, Chodura showed that the transition layer has a double structure composed of the magnetic presheath and the Debye sheath. Using a kinetic analysis by K.Sato et. al., it is found that an oblique magnetic field provide two presheath mechanisms; one is due to the ion polarization drift and another is due to finite ion-gyroradius effects. These processes at the plasma-wall boundary are very complex. In order to investigate the effect of the plasma-wall boundary with the oblique end-plate, we have demonstrated in producing a magnetized sheet plasma [4] by using a TP-D type discharge apparatus. By definition, sheet plasma should have the unique characteristics:(i) the guiding centers of all gyrating ions lie in the vicinity of the midplane of a plasma and (ii) the plasma thickness in a direction perpendicular to a dc magnetic field is as thin as twice the mean ion Larmor radius. One can consider the sheet plasma as a two-dimensional boundary" @default.
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- W2183659587 date "1998-01-01" @default.
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- W2183659587 title "MAGNETIC PRESHEATH IN FRONT OF AN OBLIQUE END-PLATE IN A MAGNETIZED SHEET PLASMA" @default.
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