Abstract

At our Institute an experiment for the direct measurement of the atomic mass unit is under way by accumulating ions from an ion beam up to a ponderable mass. The aim of this experiment is to find an alternative approach for the redefinition of the SI unit kilogram via the atomic mass unit. This paper discus two important aspects of the experiment, namely the production of a DC intense heavy ion beam and the collection process of such a beam. Until now a bismuth ion beam of ≈5mA can be extracted out of a CHORDIS ion source. Suitable geometries of an ion-collector are shown based on SIMION-3D simulations.

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