Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 593, Issue 3, Pages 353-360Publisher
ELSEVIER
DOI: 10.1016/j.nima.2008.05.017
Keywords
tracking and position-sensitive detectors; scintillating fibres; particle detector design
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Funding
- Bundesministerium fur Bildung und Forschung (bmb + f) [06MZ176]
- Helmhotz Association
- Helmholtz-University Young Investigators Group [VH-NG-239]
- DFG [SA 1696-1/1]
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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 2AGeV 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 similar to 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 similar to 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 K-AOS/A1 spectrometer at MAMI and for the HypHI experiment at GSI. (C) 2008 Elsevier B.V. All rights reserved.
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