Bonn 2010 – wissenschaftliches Programm
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)