基于AlphaGUARD P2000F测氡仪利用水中溶解氡对DDL-1型气氡仪校准的实验研究

对测氡仪器进行定期校准是保证测量结果准确性和可靠性的关键。基于用国际公认的计量传递仪器AlphaGUARD P2000F作为氡气溯源仪器及其自带水氡测量组件对三套DDL-1型电离法测氡仪使用水中溶解氡进行校准实验。实验结果和用固体氡源校准三套仪器的结果与仪器出厂校准结果进行对比,两种校准方法的K值相对误差均小于5%,达到目前地震监测氡观测技术要求。实验结果表明,水中溶解氡代替固体氡气源校准,可以解决目前固体氡源校准中存在的运输困难、维修技术要求高、国家环保部门监管严格等问题,为地震氡观测仪器校准技术找到了一种新的途径。

Experimental Study of the Calibration of a DDL-1 Gas Radon Meter Based on the AlphaGUARD P2000F Emanometer and Dissolved Radon

Regular calibration of radon-measuring instruments is key to ensuring the accuracy and reliability of measurement results. Based on the internationally recognized measuring instrument AlphaGUARD P2000F and its own water raft measurement components, calibration experiments were carried out on three sets of DDL-1 ionization detectors using dissolved radon in water. The experimental and calibration results with the solid radon source were compared with those of the out-of-factory results. It was found that the relative errors of the K values of the two calibration methods were less than 5%, which meets the requirement of current seismic monitoring techniques. These results showed that the solution of dissolved radon in water, compared with the solid radon source, solved the problems of transportation difficulties, high technical maintenance requirements, strict supervision of national environmental protection departments, etc., and defined a new approach to the calibration of seismic radon observation instruments.