A high-temperature fast neutron detector has been developed for well logging applications. The developed fast neutron detector is based on a single-crystal diamond grown by chemical vapor deposition. Among many other advantages, diamond detectors are rugged, radiation hard, and stable under high temperatures. The diamond detector was evaluated for monitoring the fast neutron intensity of pulsed neutron instruments. Pulsed neutron instruments are employed to deliver formation thermal neutron capture cross section, carbon-to-oxygen ratio, and mineralogy information. The ability to monitor the neutron generator output and correct for fluctuations has a potential for improving the measurement accuracy. Experimental results presented in the article include comparison of spectra acquired in the 25–175 °C temperature range, comparison of spectra acquired in various environments, and normalization of gamma-ray count rates to neutron generator output in a pulsed neutron gamma-ray logging tool. The results clearly show usability of diamond detectors for fast neutron measurements in pulsed neutron instruments.

中文翻译：

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用于测井应用中中子发生器输出监测的高温金刚石探测器

已经开发了一种用于测井应用的高温快中子探测器。开发的快中子探测器基于通过化学气相沉积生长的单晶金刚石。在许多其他优点中，金刚石探测器坚固耐用、抗辐射且在高温下稳定。金刚石探测器用于监测脉冲中子仪器的快中子强度。脉冲中子仪器用于提供地层热中子俘获截面、碳氧比和矿物学信息。监测中子发生器输出和修正波动的能力有可能提高测量精度。文章中提供的实验结果包括比较在 25–175 °C 温度范围内获得的光谱，比较在各种环境中获得的光谱，以及在脉冲中子伽马射线测井工具中将伽马射线计数率归一化为中子发生器输出。结果清楚地显示了金刚石探测器在脉冲中子仪器中用于快速中子测量的可用性。