Presentation of the WA97 experiment at CERN

The WA97 experiment is a part of the CERN heavy-ion program. The experiment aims to measure enhanced strangeness production as a signal of the phase transition from a Quark-Gluon Plasma. The first run for the experiment was in the autumn 1994, when CERN accelerated lead-ions in the SPS ring for the first time. The WA97 experiment have used silicon microstrip and pixel detectors with technology which have never been used before. It is shown that even the triply strange can be reliably measured in the experiment.