Title :
In beam performance of a low pressure UV rich detector
Author :
Breskin, A. ; Chechik, R. ; Drees, A. ; Fischer, P. ; Fraenkel, Z. ; Glässel, P. ; Lamade, G. ; Ries, H. ; Sauvage, D. ; Schön, A. ; Schmoetten, E. ; Specht, H.J. ; Steiner, V. ; Tserruya, I.
Author_Institution :
Weizmann Inst. of Sci., Rehovot, Israel
Abstract :
A low-pressure multistep, TMAE-filled, UV-sensitive detector has been developed for Cerenkov ring imaging for ultrarelativistic heavy-ion experiments (HELIOS-CERN). A description is given of the detector structure and its basic properties, and the experimental setup and the detector performance in tests with high-energy electrons are presented. Three modes of readout are used: three-wire coordinates and flash analog-to-digital converters; pad readout; and optical recording of the avalanches. Single photons can be localized with an accuracy of sigma approximately=2 mm, mainly due to single-photoelectron diffusion and to chromatic dispersion in the radiator gas. The experimental N/sub 0/ values obtained by the three methods are close to those expected, taking into account the various losses due to the test conditions.<>
Keywords :
Cherenkov counters; radiation detection and measurement; Cerenkov ring imaging; HELIOS-CERN; TMAE-filled; avalanches; chromatic dispersion; flash analog-to-digital converters; high-energy electrons; low pressure UV rich detector; multistep; optical recording; pad readout; single-photoelectron diffusion; three-wire coordinates; ultrarelativistic heavy-ion experiments; Costs; Detectors; Electrons; Event detection; Optical imaging; Optical losses; Optical recording; Spectroscopy; Testing; Wire;
Journal_Title :
Nuclear Science, IEEE Transactions on
