Author/Authors :
Bay، نويسنده , , A and Benussi، نويسنده , , R. and Bruski، نويسنده , , N and Buontempo، نويسنده , , S and Currat، نويسنده , , C and D’Ambrosio، نويسنده , , N and Ekimov، نويسنده , , A.V and Ereditato، نويسنده , , A and Fabre، نويسنده , , J.P and Fanti، نويسنده , , V and Frekers، نويسنده , , D and Frenkel، نويسنده , , A and Golovkin، نويسنده , , S.V. and Govorun، نويسنده , , V.N and Harrison، نويسنده , , C. and Koppenburg، نويسنده , , P and Kozarenko، نويسنده , , E.N. and Kreslo، نويسنده , , I.E and Liberti، نويسنده , , B and Martellotti، نويسنده , , G and Medvedkov، نويسنده , , A.M and Mondardini، نويسنده , , M.R and Penso، نويسنده , , G and Siegmund، نويسنده , , W.P and Vasil’chenko، نويسنده , , V.G and Vilain، نويسنده , , P and Wilquet، نويسنده , , G and Winter، نويسنده , , K and W?rtche، نويسنده , , H.J، نويسنده ,
Abstract :
Results are given on tests of a high-resolution tracking hodoscope based on layers of 26-μm-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 2.1×21 cm2. 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 μm, and allowed determination of the track position in a neighbouring layer with a precision of ∼170 μm. 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.
