Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Instrumentierung X

HK 53.7: Vortrag

Donnerstag, 18. März 2010, 18:15–18:30, HG IV

NeuLAND MRPC-based detector prototypes tested with fast neutrons — •Christoph Caesar — GSI Darmstadt, Planckstrasse 1, 64291 Darmstadt, Germany

A detector for momentum measurements of high-energy neutrons in the energy range 0.2-1 GeV is being developed for the R3B (Reactions with Relativistic Radioactive Beams) experiment at FAIR. Based on the running LAND detector at GSI, the currently pursued concept for NeuLAND is a layerd structure made of iron converters and charged particle detectors. As charged particle detectors Multigap Resistive Plate Chamber (MRPC) detectors will be used. The excellent time resolution of the MRPC units will allow for a very good time-of-flight resolution of NeuLAND. The design goal for the full detector is σtime < 100   ps. The full NeuLAND detector will consist of about 60 layers of the basic structure (converter + MRPC), leading to a detection efficiency of close to 100% for neutrons with energies higher than 200 MeV. Prototypes built at GSI and FZD were tested using MIPs at the ELBE electron beam facility at FZD. Here we present recent results from a first irradiation of the prototypes with fast neutrons. The TSL Uppsala monoenergetic neutron beam of En=175 MeV is well-suited for such a study. These data will serve both for the validation of the basic detection scheme and as important input to refine GEANT4 and FLUKA simulations of the final detector.
This project is supported by BMBF and GSI. The access to TSL Uppsala was supported by the European Union through FP6-EFNUDAT (EURATOM contract no. 036434)

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