Electron heat transport in the magnetic filter of a volume plasma-based source of H-/D- ions

A time-independent one-dimensional model of the electron energy balance in the region of the magnetic filter of a volume plasma-based ion source is ju stified. The local electron energy balance equation and the steady density profiles of the plasma components are used to determine the transverse (wit h respect to the magnetic field) electron temperature profile, which is fou nd to agree well with the experimental profile. The temperature profile obt ained analytically is then used to refine the particle balance in a plasma with two ion species and, accordingly, to find the optimum conditions for t he formation of an H-/D- beam and for extracting the beam from the source. (C) 2000 MAIK "Nauka/Interperiodica".