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

Jordan, D. V. ; Reeder, P. L. ; Stephens, D. L. ; Geelhood, B. D. ; Todd, L. C.

Technical Information Center Oak Ridge Tennessee

关键词: Plastic scintillators;    Gamma detection;    Efficiency;    Coincidence methods;    Radiation detectors;   

RP-ID  :  DE2008925718

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 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.