The NA49 experiment was a particle physics experiment that took place in the North Area of the Super Proton Synchrotron at CERN. It used a large-acceptance hadron detector (a time projection chamber) to investigate reactions induced by the collision of various heavy ions (such as those of lead) on targets made of a variety of elements. This was used to investigate the properties of quark–gluon plasma.
The NA49 experiment was the follow-up to the NA35 experiment, and was approved on 18 September 1991. The experiment was completed on 19 October 2002, and was succeeded by the NA61 experiment (SHINE). The spokesperson for the experiment is Peter Seyboth and Reinhard Stock.