arXiv subjects
Publications and source records attributed to C. Mindas.
The key parameters of Cherenkov Correlated Timing (CCT) detectors are discussed. Measurements of radiator geometry, optical properties of radiator and coupling materials, and photon detector timing performance are presented.
Several prototypes of a Cherenkov Correlated Timing (CCT) Detector have been tested at the KEK-PS test beam line. We describe the results for Cherenkov light yields and timing characteristics from quartz and acrylic bar prototypes. A Cherenkov angle resolution is found to be 15 mrad at a propagation distance of 100 cm with a 2 cm thick quartz bar prototype.
The DIRC (Detection of Internally Reflected Cerenkov light) is a new type of ring imaging Cerenkov detector, which detects images from Cerenkov light produced in precisely machined quartz bars. The Cerenkov images are transported along several meters of bar to the edge of the detector where they are proximity focussed unto an array of conventional photomultiplier tubes. Results from a prototype device comprising a 2 x 4 x 240 cm**3 quartz bar read by an array of 480 PMT's are presented. Sample images, which are the first observed in this type of detector, are shown. Measurements of the light yield (approximately 20 photoelectrons per image) and the angular resolution are in good agreement with Monte Carlo predictions.