Photon sandwich detectors with WLS fiber readout

Abstract

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.

10 pages, 8 figures, 2 tables, talk at the INSTR02 Conference, Novosibirsk, Russia, February 28 - March 6, 2002

Cited by in corpus (9)

• New measurement of the K+ => pi+,nu,nubar branching ratio
• Improved Measurement of the K+ to pi+ nu nubar Branching Ratio
• The near neutrino detector for the T2K experiment
• Search for the decay K+ to pi+ gamma gamma in the pi+ momentum region P>213 MeV/c
• Upper Limit on the Branching Ratio for the Decay ${\pi }^0\to \nu \bar{\nu }$
• Scintillator counters with multi-pixel avalanche photodiode readout for the ND280 detector of the T2K experiment
• Long sandwich modules for photon veto detectors
• Large-Area Sandwich Veto Detector with WLS Fibre Readout for Hadron Spectroscopy at COMPASS
• Plans for Kaon Physics at BNL