Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2008-02-20
Nucl.Instrum.Meth.A593:353-360,2008
Physics
Nuclear Physics
Nuclear Experiment
submitted to Nucl. Instrum. Meth. A
Scientific paper
10.1016/j.nima.2008.05.017
The performance of scintillating fibre detectors was studied with electrons at the spectrometer facility of the Mainz microtron MAMI, as well as in a C-12 beam of 2 AGeV energy and in a beam of different particle species at GSI. Multi-anode photomultipliers were used to read out one or more bundles of 128 fibres each in different geometries. For electrons a time resolution of FWHM = 1 ns was measured in a single detector plane with a detection efficiency epsilon > 99%. A time resolution of 310 ps (FWHM) between two planes of fibres was achieved for carbon ions, leading to a FWHM = 220 ps for a single detector. The hit position residual was measured with a width of FWHM = 0.27 mm. The variation in the measured energy deposition was Delta E/E= 15-20% (FWHM) for carbon ions. In addition, the energy response to p/pi/d particles was studied. Based on the good detector performance fibre hodoscopes will be constructed for the KAOS/A1 spectrometer at MAMI and for the HypHI experiment at GSI.
Achenbach Patrick
Ajimura S.
Bernauer Jan C.
Böhm Ralph
Debenjak L.
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