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27 April 2024

» arxiv » 0802.2830

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In-beam tests of scintillating fibre detectors at MAMI and at GSI
P. Achenbach ; C. Ayerbe Gayoso ; J. C. Bernauer ; R. Böhm ; M. O. Distler ; L. Doria ; M. Gómez Rodríguez de la Paz ; H. Merkel ; U. Müller ; L. Nungesser ; J. Pochodzalla ; S. Sánchez Majos ; B. S. Schlimme ; Th. Walcher ; M. Weinriefer ; L. Debenjak ; M. Potokar ; S. Sirca ; M. Kavatsyuk ; O. Lepyoshkina ; S. Minami ; D. Nakajima ; C. Rappold ; T.R. Saito ; D. Schardt ; M. Träger ; H. Iwase ; S. Ajimura ; A. Sakaguchi ; Y. Mizoi ;
Date:	20 Feb 2008
Abstract:	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.
Source:	arXiv, 0802.2830
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