Title :
A Time-of-Flight Hodoscope Saving the Number of Photomultipliers
Author :
Bressani, Tullio ; Caria, Mario ; Serci, Sergio ; Iazzi, Felice ; Minetti, Bruno ; Chiavassa, Emilio ; Costa, Sergio ; Dellacasa, Giuseppe ; Marco, Nora De ; Gallio, Mauro ; Musso, Alfredo ; Fassnacht, Patrick
Author_Institution :
Dipartimento di Scienze Fisiche, Universit? di Cagliari, 09100 Cagliari, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Torino, 10125 Torino, Italy
Abstract :
Results of measurements of the performances of a time-of-flight hodoscope consisting of 16 slabs of plastic scintillator, 90Ã4Ã1 cm3 each, viewed by only 8 (instead of 32) photomultipliers are described. The slabs are coupled to the photomultipliers in such a way that they are considered as the elements of a square matrix of rank 4. Thus only 2Ã4 photomultipliers are needed to identify unambiguously each of the 16 slabs, if only a particle at a time has to be detected. By means of a very simple electronics we obtained a local time-of-flight resolution of 570 ps fwhm and a spatial resolution along each slab of 5 cm fwhm. The cross-talk due to unrecognized events was less than 5%.
Keywords :
Mesons; Nuclear measurements; Particle measurements; Performance evaluation; Photomultipliers; Plastics; Position measurement; Radiation detectors; Slabs; Spatial resolution;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1984.4333231