Design of high reliability nuclear logging probe

Yingchun Xiao, Shihong Xiang, Zhengyu Zhao, Zuping Qian
<span title="">2010</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="" style="color: black;">Procedia Engineering</a> </i> &nbsp;
Nuclear Logging Probe may measure the naturally occurring gamma ray radiation level and detect gamma rays from a radioactive source within a well bore. It is used for depth correlation, lithology, mixture density measurement, identification of radioactive scale. But because of the harsh working environment, high temperature above 100 , high pressure, shock, it is difficult to get accurate measurement result. In this paper several possible cases that affect the measurement result were discussed;
more &raquo; ... and then provide appropriate solutions. The application of photomultiplier tube (PMT), NaI crystal, design of photon counting unit, divider of PMT were also discussed; A detailed circuit with high reliability is presented. Some measured results of the actual circuit are shown.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1016/j.proeng.2010.11.035</a> <a target="_blank" rel="external noopener" href="">fatcat:lkyzug7byfaw3dfpqx57v7aklm</a> </span>
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