In-beam tests of scintillating fibre detectors at MAMI and at GSI (original) (raw)
2008, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
The performance of scintillating fibre detectors was studied with electrons at the spectrometer facility of the Mainz microtron MAMI, as well as in a 12 C 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 ǫ > 99 %. A time resolution of Preprint submitted to Nucl. Instr. and Meth. in Phys. Res. A 22 October 2018 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 ∆E/E = 15-20 % (FWHM) for carbon ions. In addition, the energy response to p/π + /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.
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