A Multi-Anode Photomultiplier Tube Based Wavelength-Shifting-Fiber Detector for neutron diffraction

Conference · Sat Dec 31 23:00:00 EST 2011

OSTI ID:1056993

Berry, Kevin D ^[1]; Clonts, Lloyd G ^[1]; Crow, Lowell ^[1]; Diawara, Yacouba ^[1]; Funk, Loren L ^[1]; Hannan, Bruce W ^[1]; Hodges, Jason P ^[1]; Riedel, Richard A ^[1]; Wang, Cai-Lin ^[1]

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1. ORNL

The wavelength-shifting (WLS) fiber scintillator neutron detectors were developed for two time-of-flight (TOF) neutron powder diffractometers (POWGEN, VULCAN) at Spallation Neutron Source (SNS). In a recent module (v3.0), however, there are 32 1-inch-diameter photomultiplier tubes (PMTs) which are bulky and expensive. We built a new detector module (v3.1) based on four multi-anode (MA) PMTs, and tested its performance including detection efficiency, count rate capability, spatial resolution, ghosting properties, and gamma-ray sensitivity. The v3.1 module was compared with two prior v3.0 modules, and 3He tube detectors.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Flux Isotope Reactor; Spallation Neutron Source
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1056993
• Country of Publication: United States
• Language: English