Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Instrumentierung V
HK 21.1: Gruppenbericht
Dienstag, 22. März 2011, 14:00–14:30, HS2
Challenges and Solutions for the Detection System of the R3B Experiment at FAIR — •Konstanze Boretzky — GSI Darmstadt, Germany
The R3B (Reactions with Relativistic Radioactive Beams) experiment at the high-energy branch of the Super-FRS is designated for high-energy reaction studies in inverse kinematics. The experiment will allow for kinematically complete measurements of reactions with radioactive ions covering the full mass range up to uranium. For the heaviest nuclei this implies using beam energies of ≥1 GeV/u to ensure fully-stripped ions for proper separation and magnetic momentum analysis after the secondary target. The present contribution will review the progress achieved so far concerning the various components of the R3B setup. The large-acceptance super-conducting dipole GLAD, in conjunction with a high-resolution tracking system, will provide a momentum resolution of δ p/p ≅ 10−3 even for the heaviest ions. A novel detection system NeuLAND for high-energy neutrons (0.2 to 1 GeV) with very good position and time resolution below 100 ps will allow invariant-mass spectroscopy with a resolution of 100 keV and a clean multi-neutron recognition even for the highest beam energies. An energy resolution of 20 keV at the threshold is envisaged e.g. for reactions of astrophysical interest. In order to cope with the huge Doppler effect at typical beam energies, the photon calorimeter CALIFA will consist of several thousands of crystals. The R3B setup will be subsequently installed, commissioned and used in experiments at the R3B-LAND hall at GSI before moving to the R3B experimental area at FAIR.