Physics – Instrumentation and Detectors
Scientific paper
2002-07-09
Nucl.Instrum.Meth.A494:362-368,2002
Physics
Instrumentation and Detectors
10 pages, 8 figures, 2 tables, talk at the INSTR02 Conference, Novosibirsk, Russia, February 28 - March 6, 2002
Scientific paper
10.1016/S0168-9002(02)01493-6
A photon detector for BNL experiment E949 is described. The detector consists of lead/scintillator ``sandwich'' of 25 layers of 5 mm thick scintillator BC404 and 24 layers of 2 mm lead absorber. Readout is implemented with 30-60 cm long WLS fibers (BCF99-29AA) glued into grooves in the BC404. Average yield was measured with cosmic rays to be about 43 p.e./MeV. Extruded plastic scintillation counters developed for sandwich detectors of photons for the KOPIO experiment are also described. For a 7 mm thick counter with 4.3 m long WLS fibers spaced at 7 mm a light yield of 18.7 p.e./MeV and time resolution of 0.71 ns were obtained. A prototype photon veto module consisting of 10 layers of 7 mm thick extruded plastic slabs interleaved with 1 mm lead sheets was tested.
Frank Jacki
Garber Elizabeth
Ivashkin A.
Kettell Steve
Khabibullin M. M.
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