Emittance Studies of the High Current Ion Sources at GSI

In order to compare the beam quality produced by the ion source CHORDIS and the vacuum arc ion source VARIS, beam emittance measurements have been performed. The ion sources were equipped with a multi-aperture accel-decel extraction system, which is usually chosen for beam time operation at GSI. A slit-grid emittance measurement device was used for these investigations. Further on, sophisticated computer simulations with Kobra3-INP have been carried out