Advanced Large Area Plastic Scintillator Project (ALPS): Final Report

Jordan, David V. ; Reeder, Paul L. ; Todd, Lindsay C. ; Warren, Glen A. ; McCormick, Kathleen R. ; Stephens, Daniel L. ; Geelhood, Bruce D. ; Alzheimer, James M. ; Crowell, Shannon L. ; Sliger, William A.

关键词: GAMMA DETECTION;    EFFICIENCY;    PLASTIC SCINTILLATORS;    COINCIDENCE METHODS;    RADIATION DETECTORS ALPS;    Large-area;    Plastic Scintillator;   

DOI  :  10.2172/925718
RP-ID  :  PNNL-17305
PID  :  OSTI ID: 925718
Others  :  Other: NN2001000
Others  :  TRN: US0802442

美国|英语

来源: SciTech Connect

【 摘 要 】

The advanced Large-Area Plastic Scintillator (ALPS) Project at Pacific Northwest National Laboratory investigated possible technological avenues for substantially advancing the state-of-the-art in gamma-ray detection via large-area plastic scintillators. The three predominant themes of these investigations comprised the following: * Maximizing light collection efficiency from a single large-area sheet of plastic scintillator, and optimizing hardware event trigger definition to retain detection efficiency while exploiting the power of coincidence to suppress single-PMT "dark current" background; * Utilizing anti-Compton vetoing and supplementary spectral information from a co-located secondary, or "Back" detector, to both (1) minimize Compton background in the low-energy portion of the "Front" scintillator's pulse-height spectrum, and (2) sharpen the statistical accuracy of the front detector's low-energy response prediction as impelmented in suitable energy-windowing algorithms; and * Investigating alternative materials to enhance the intrinsic gamma-ray detection efficiency of plastic-based sensors.