where n = plasma density, Te and T; - electron and ion temperatures in energy units, B = magnetic induction, and p0 = the magnetic permeability of vacuum. In turbulent plasma with Langmuir fluctuations, this becomes the pressure of the turbulent electric field: where eo = the electric permeability of vacuum and <(ET)2> = the mean square of the turbulent electric field strength. In a homogeneous plasma pTE < p. A similar electric field pressure is observed in the double electric (Debye) layers occurring at the edges of the homogeneous plasma. But with such a high energy supply to the erosion plasma on the edge of the highly turbulent plasma and dense pre-wall vapor, non-equilibrium triple (minusplus-minus) electric layers with oscillating electrons may be generated. Ilie normal electric field in these layers is: where <TD> is the transverse electron energy in the layer, nD is the average electron and ion density, e is the charge of the electron, and D = (eo<TD>/e2nD)1/2 - the thickness of the Debye layer. Ilie pressure of this field is and may be much greater than the kinetic and magnetic pressures in neighboring plasma, hence the appelation ‘anomalous pressure’. The structure of the triple D-layer may be considered on the basis of Vlasov’s and Poisson’s equations:
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