The higher beam intensities at FAIR take well-established detectors like Multi-Sampling Ionization Chamber (MUSIC) devoted to precise energy-loss ΔE measurements needed for identification of the proton number of the fragments to the operation limit.
A design concept of a tilted electrode gas ionization chamber (TEGIC) with position sensitive extension has been designed and realized at TU Munich. The chamber (300x480x140 mm3), consisting of planar electrodes tilted by 60 degree with respect to the beam axis, has been tested at the FRS (March 2014) with secondary beams from uranium fission at 700 MeV/nucleon using a fully digital readout system for pile-up handling. A resolution of energy loss of ΔZ=0.64 (FWHM) has been obtained for ions in the region around Z=50.
Partners: TU Munich, Helsinki IP and Jyvaskyla Uni, GSI and CEA DAM Saclay