title: Simulation of cesium injection and distribution in rf-driven ion sources for negative hydrogen ion generation.
abstract: Cesium seeded sources for surface generated negative hydrogen ions are major components of neutral beam injection systems in future large-scale fusion experiments such as ITER. Stability and delivered current density depend highly on the cesium conditions during plasma-on and plasma-off phases of the ion source. The Monte Carlo code CSFLOW3D was used to study the transport of neutral and ionic cesium in both phases. Homogeneous and intense flows were obtained from two cesium sources in the expansion region of the ion source and from a dispenser array, which is located 10 cm in front of the converter surface.
authors.affiliation: EURATOM Association, Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, 85748 Garching, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Gutser
authors.forename: U
authors.initials: U
authors.lastname: Fantz
authors.forename: D
authors.initials: D
authors.lastname: Wünderlich