A high-resolution tracking hodoscope based on capillary layers filled with liquid scintillator
FANTI, VIVIANA;
2001-01-01
Abstract
Results are given on tests of a high-resolution tracking hodoscope based on layers of 26-mum-bore glass capillaries filled with organic liquid scintillator (1-methylnaphthalene doped with R39). The detector prototype consisted of three 2-mm-thick parallel layers, with surface areas of 3.1 x 21 cm(2). The layers had a centre-to-centre spacing of 6 mm, and were read by an optoelectronic chain comprising two electrostatically focused image intensifiers and an Electron-Bombarded Charge-Coupled Device (EBCCD). Tracks of cosmic-ray particles were recorded and analysed. The observed hit density was 6.6 hits/mm for particles crossing the layers perpendicularly, at a distance of 1 cm from the capillaries' readout end, and 4.2 hits/mm for particles at a distance of 20 cm, A track segment reconstructed in a single layer had an rms residual of 20 mum, and allowed determination of the track position in a neighbouring layer with a precision of similar to 170 mum. This latter value corresponded to an rms angular resolution per layer of about 30 mrad, A comparison is made between capillary layers and silicon microstrip planes. (C) 2001 Elsevier Science B.V. All rights reserved.Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.