THE UPGRADED AMSTERDAM NUCLEAR MICROPROBE

The improvement of the facilities at our University consists of three phases. In phase 1, a 1.7 MV NEC tandem-Pelletron accelerator has been installed. The accelerator serves as injector for two beam lines, sub sequently for macro- and micro-analysis. Moreover, an interconnection has been made with a beam line from our 400 kV high voltage Van de Gra aff accelerator in order to enable injection of these very intense low energy beams in these two lines. Apart from new vacuum equipment and conventional beam steering and focussing elements, the experimental fa cilities are replaced from the cyclotron experimental hall to the newl y organised experimental hall. In the phases 2 and 3, which are not ye t completed, a second ion source for the Pelletron and a new or extend ed focussing unit for the microprobe will complete the overall operati on.