用于中子测井的自成靶密封中子管性能评价

采用自成靶工艺,研制了SNT-DT/25型密封氘氚中子管,对其工作温度、使用寿命、功耗、中子产额及其稳定性等性能参数进行了测试。结果表明:中子管使用温度可达175℃,最高中子产额≥1×109 n/s,中子产额浮动≤10%;在靶极电压-80kV、阳极电流300μA、靶流80μA的工作条件下,中子产额可达1×108 n/s,中子管的性能指标完全满足中子测井使用要求。此外,本文还对中子产额随靶极电压、阳极电流的影响进行了分析。

The Parameters Test of a Sealed D-T Logging Neutron Tube

The SNT‐DT/25 type neutron tube was developed by drive‐in target technolo‐gy .Focused on the strict advices for well‐logging neutron tube ,the important parame‐ters ,such as neutron yield ,stability ,life span ,were investigated on the special plat‐form for neutron tube annealing .The results suggested that the operating temperature w as as high as 175 ℃ ,the limit yield reached up to 109 n/s ,the neutron yield changed less than 10% ,and the neutron yield could reach to 1 ×108 n/s with acceleration voltage-80 kV and the anode current of 300 μA .Besides , the effect of target voltage and anodic current with neutron yield was analyzed .