Title :
Position sensitive photon counting with an ISPA tube
Author :
Ambrosio, C.D. ; Gys, T. ; Leutz, H. ; Piedigrossi, D. ; Puertolas, D. ; Tailhardat, S.
Author_Institution :
CERN, Geneva, Switzerland
fDate :
6/1/1995 12:00:00 AM
Abstract :
The newly developed Imaging Silicon Pixel Array (ISPA) tube consists of a photocathode viewed at a 30-mm distance by a silicon chip, which contains 1024 pixels with 75 μm×500 μm edges. With this tube we imaged, as an example of a weak light source, β-tracks (90Sr) traversing a fused square bundle (2.5 mm edges), which contains 1600 individual scintillating fibers of 60-μm transverse dimension. Simultaneously we counted the number of photoelectrons/mm (hit density) at different source positions along the 2-m fiber bundle, with potential differences varying from 10 kV to 26 kV between photocathode and pixel anode of the ISPA tube, and at different threshold settings of the pixel chip. The obtained hit densities are compared with those measured with a Hybrid Photomultiplier Tube (HPMT), which contains a silicon pin diode as anode instead of a pixel chip
Keywords :
gamma-ray detection; photomultipliers; position sensitive particle detectors; silicon radiation detectors; β-tracks; 10 to 26 kV; 2 m; 2.5 mm; 30 mm; 60 mum; 90Sr; HPMT; Hybrid Photomultiplier Tube; ISPA tube; Imaging Silicon Pixel Array tube; Si chip; Si pin diode anode; fiber bundle; fused square bundle; hit density; photocathode; photoelectrons; pixel anode; position sensitive photon counting; scintillating fibers; source positions; threshold settings; weak light source; Anodes; Cathodes; Delay lines; Light sources; Optical arrays; Optical fibers; Optical imaging; Photomultipliers; Pixel; Silicon;
Journal_Title :
Nuclear Science, IEEE Transactions on
