涂硼MRPC热中子探测器用于补偿中子测井的蒙特卡罗研究  

Monte Carlo simulation on the application of boron-coated MRPC thermal neutron detector to the compensated neutron logging

作　　者：贾文宝[1] 曾捷[1] 单卿[1] 凌永生[1] 黑大千[1] 张焱[1] 魏勇红[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《核技术》2014年第6期15-18,共4页Nuclear Techniques

基　　金：中央高校基本科研业务费专项资金(No.NS2012055)资助

摘　　要：本文利用蒙特卡罗方法模拟了涂硼多气隙电阻板室(Multi-gap Resistive Plate Chamber,MRPC)热中子探测器和3He正比计数管在常规条件和欠平衡条件下的补偿中子测井中的响应。模拟结果表明,使用涂硼MRPC热中子探测器时,得到近远探测器计数随孔隙度而增加,且与使用3He正比计数管时得到的结果基本一致,说明涂硼MRPC热中子探测器可用于补偿中子测井。Background： The compensated neutron logging technology is widely used in oil exploration and development. The neutron detector commonly used in this technology is the helium-3 proportional counter. Due to the decreasing in supply of the helium-3 gas, the price of the helium-3 proportional counter rises quickly. Purpose： The aim is to develop a new type of neutron detector to replace the helium-3 tubes in the compensated neutron logging technology. Methods： A new thermal neutron detector coated with a layer of thermal neutron convertor in the inner glass of the Multi-gap Resistive Plate Chamber （MRPC） was developed. Under the conventional and underbalanced conditions, Monte Carlo method was used to simulate the response of the boron-coated MRPC thermal neutron detector and helium-3 proportional counter employed in compensated neutron logging technology. Results： It is shown that the SS/LS increases with the rise of porosity using either the boron-coated MRPC thermal neutron detector or the helium-3 proportional counter, and the results of these two detectors are basically identical. Conclusion： It indicates that the boron-coated MRPC thermal neutron detector can be used for compensated neutron logging.

关 键 词：蒙特卡罗方法 补偿中子测井 涂硼多气隙电阻板室(Multi-gap Resistive Plate Chamber MRPC)热中子探测器 

分 类 号：TL816.3[核科学技术—核技术及应用]