Title :
A multi-anode photomultiplier tube based wavelength-shifting-fiber detector for neutron diffraction
Author :
Wang, C.L. ; Berry, K.D. ; Clonts, L.G. ; Crow, Mariesa L. ; Diawara, Y. ; Funk, L.L. ; Hannan, B.W. ; Hodges, J.P. ; Riedel, R.A. ; Kline, Charles ; Workman, H.E.
Author_Institution :
Neutron Sci. Directorate, Oak Ridge Nat. Lab., Oak Ridge, TN, USA
fDate :
Oct. 27 2012-Nov. 3 2012
Abstract :
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 l-inchdiameter 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 tu be detectors.
Keywords :
neutron diffraction; photomultipliers; solid scintillation detectors; POWGEN; Spallation Neutron Source; VULCAN; WLS fiber scintillator neutron detector; count rate capability; detection efficiency; gamma-ray sensitivity; ghosting properties; multianode photomultiplier tube; neutron diffraction; spatial resolution; time-of-flight neutron powder diffractometers; wavelength shifting fiber detector;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-2028-3
DOI :
10.1109/NSSMIC.2012.6551088
