It uses a two-accelerators configuration coupled by an Electron Cyclotron Resonance ion source. The proton beam is sent on a dedicated target from which the radioactive atoms are extracted through diffusion. This type of primary beam makes our facility somewhat different from other radioactive beam facilities now being planned and build. The schematic target set-up used is shown in Fig. 1. Before the proton beam hits the target, it first passes a collimator and then a 0.5-mm graphite window that separates the target vacuum from the cyclotron vacuum.
Activity diffusing from the target is pumped away to the ion source.
The beam is first tuned on the 45-mm diameter target using a small retractable collimator located before the main collimator. During operation the beam spot is moved over the target by means of a 50Hz wobbling magnet. The target is enclosed in its own cavity, details of which will be discussed later. Details of the targetbox showing target, window and collimator geometry. An idea of the size is given by the targetdiameter which is 45 mm.