Abstract : Spallation mechanisms are not yet completely understood, especially because of the difficulty to experimentally disentangle the effects of the different steps of the reaction. In order to understand these mechanisms, we have developed a new experimental device able to perform inclusive measurements. In particular the detection of light charged particles is described in detail.
In order to validate our device, we have compared our preliminary results obtained on the 56Fe+p system at 1 GeV/u with inclusive measurements previously obtained at the FRS spectrometer of the GSI facility. A comparison of charge differential cross section shows reasonable agreement. However, our new device allowed extension of those measurements down to Z=1 and Z=2. These cross sections are important for material damage studies. Taking into account our errors bars, the evolution of mean longitudinal velocities with respect to residue masses is comparable to that obtained at the FRS. These first results, although preliminary, allow us to validate our experimental device. It is now possible to exploit the strong points of our exclusives measurements, namely correlations between different measured observables. Finally, experimental problems encountered will be taken into account in the future experimental programs, in order to ensure the best measurements conditions.