NEUTRALIZATION OF H- BEAMS IN PLASMA-NEUTRALIZERS

Employing the Giessen ion-ion crossed-beams apparatus, we have investi gated the one- and two-electron detachment processes from H- in collis ions with multiply-charged noble gas ions. For both processes, absolut e cross sections have been measured in the center-of-mass energy range from 50 keV to 200 keV. Different target ion species have been used a s well as different target ion charge states q ranging up to q = 8. Th e data are compared to the results of recent theoretical approaches. B ased on the provided data, estimations have been made for the expected neutralization efficiencies of H- ion beams in a so-called ''plasma-n eutralizer'' proposed for efficient neutral beam heating of future fus ion devices.