The CB-ELSA experiment

The Crystal Barrel detector used before at LEAR (CERN) has been modified and installed at the electron stretcher accelerator (ELSA) in Bonn. It will be used to study photo- and electro-production of neutral mesons. One of the major aims of this experiment is the search for missing baryon resonances and to achieve a better understanding of the baryon spectrum. First data from test runs at low energy (250 MeV<E/sub gamma /<800 MeV) show photoproduction of pi /sup 0/ and of 2 pi /sup 0/-pairs. (3 refs).