3He Neutron Detector Pressure Effect and Comparison to Models

Kouzes, Richard T. ; Ely, James H. ; Lintereur, Azaree T. ; Siciliano, Edward R. ; Stromswold, David C. ; Woodring, Mitchell L.

关键词: EFFICIENCY;    NEUTRON DETECTION;    NEUTRON DETECTORS;    PERFORMANCE;    PRESSURE DEPENDENCE;    PROPORTIONAL COUNTERS;    SENSITIVITY;    HELIUM 3;    MATHEMATICAL MODELS;    VALIDATION neutron detection;    He3;    3He;   

DOI  :  10.2172/971884
RP-ID  :  PNNL-19110
PID  :  OSTI ID: 971884
Others  :  Other: NN2001000
Others  :  TRN: US1001936

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来源: SciTech Connect

【 摘 要 】

Reported here are the results of measurements performed to determine the efficiency of 3He filled proportional counters as a function of gas pressure in the SAIC system. Motivation for these measurements was largely to validate the current model of the SAIC system. Those predictions indicated that the neutron detection efficiency plotted as a function of pressure has a simple, logarithmic shape. As for absolute performance, the model results indicated the 3He pressure in the current SAIC system could not be reduced appreciably while meeting the current required level of detection sensitivity. Thus, saving 3He by reducing its pressure was predicted not to be a viable option in the current SAIC system.