Abstract
It is shown that the electron temperature in the region where the vacuum-discharge plasma is in equilibrium with the intrinsic magnetic field is proportional to the discharge current I and inversely proportional to the coefficient of erosion of the cathode material. For I≥300 A, this region features additional electron-impact ionization of ions coming from the near-cathode layer. As a result, the average ion charge Z increases with the current strength, the Z(I) dependence being more pronounced at a lower discharge pulse duration.
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