Author/Authors :
Achenbach، نويسنده , , P. and Ayerbe Gayoso، نويسنده , , C. and Bernauer، نويسنده , , J.C. and B?hm، نويسنده , , R. and Distler، نويسنده , , M.O. and Doria، نويسنده , , L. and G?mez Rodr?guez de la Paz، نويسنده , , M. and Merkel، نويسنده , , H. and Müller، نويسنده , , U. and Nungesser، نويسنده , , L. and Pochodzalla، نويسنده , , J. and S?nchez Majos، نويسنده , , S. and Schlimme، نويسنده , , B.S. and Walcher، نويسنده ,
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 12C 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 ε > 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 Δ 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.
