title: Correlation between the plasma parameters and the extracted current density in the volume-production based sources of negative hydrogen ions.
abstract: Unified description of a volume-production based source of negative hydrogen ions, including its three regions--the driver, the plasma expansion through the magnetic filter, and the extraction of the ions at the position of the first electrode of the extraction system--is presented within a two-dimensional fluid plasma model. The results display the crucial role of the potential of the first electrode of the extraction system and show that the optimized conditions for the source operation should ensure proper balance between the local and non-local processes in the discharge. The role of the material of the plasma electrode is also discussed.
authors.affiliation: Faculty of Physics, Sofia University, Sofia BG-1164, Bulgaria. lishev@phys.uni-sofia.bg
authors.forename: St
authors.initials: S
authors.lastname: Lishev
authors.forename: A
authors.initials: A
authors.lastname: Shivarova
authors.forename: Kh
authors.initials: Kh
authors.lastname: Tarnev