A lead/proportional-tube electromagnetic calorimeter for direct photon detection - The UA6 Collaboration; Camilleri, L.; Dick, L.; Jeanneret, J.-B.; Von Dardel, G.; Baumann, S.; Bernasconi, A.; Gabioud, B.; Vacchi, A.; Joseph, C.; Morel, C.; Rivers, C.; et al. (Elsevier)
The fine-grained lead/proportional-tube electromagnetic calorimeter used in CERN experiment UA6 is described. Test-beam results demonstrate linear energy response over a wide dynamic range, position resolution for shower localization reaching 1.7 mm for 70 GeV electrons, and good electron/hadron differentiation. Electron shower transverse widths are measured to be less than 9.0 mm for energies between 3 and 70 GeV. This feature allows us to identify neutral-meson decays yielding two close photon showers that constitute the main background to single-photon detection.
http://linkinghub.elsevier.com/retrieve/pii/0168-9002(90)90206-L
Keywords: U