【摘要】 气体探测器中工作气体的平均电离能、法诺因子及漂移速度等参数对于探测器的前期模拟及设计乃至径迹重建有着重要影响。SeF₆作为国内无中微子双贝塔衰变实验中的目标工作气体，相关参数未知需要探究。为研究该气体相关参数设计了一套测量方案，并采用Ar+10%CH₄（P10）工作气体对该实验方案的测量精度和可靠性进行检验。实验中通过屏栅电离室测量α源得出P10平均电离能为27.46±0.05 eV；当能量分辨率达到0.91%时，刻度电子学后扣除噪声得到法诺因子为0.181±0.001。同时采用266 nm激光和时间投影室完成漂移速度的测量，其结果与Garifield++模拟结果吻合。实验结果表明，该测量方案可行，测量结果可靠性高。为后续开展SeF₆性质的研究工作做好了准备。更多还原

【Abstract】 The properties of working gases in gas detectors, such as the average ionization energy, Fano factor, and drift velocity, have a significant impact on the preliminary simulation, parameter design, and trajectory reconstruction of the detectors.SeF₆, as the target working gas in domestic neutrinoless double beta decay experiments, has unknown parameters that need to be investigated. To study the relevant parameters of this gas, a measurement scheme was designed and the accuracy and reliability of the experimental plan were tested using Ar+10%CH₄（P10） as the working gas. In the experiment, the average ionization energy of P10 was measured using a grid ionization chamber with an α source, yielding a value of 27.46±0.05 eV, and the Fano factor was determined to be 0.181±0.001 when the energy resolution reached 0.91% after subtracting noise through calibration electronics. Additionally, the drift velocity was measured using a 266 nm laser and a time projection chamber, and the results were consistent with the Garfield++ simulation results. The experimental results indicate the feasibility of the measurement scheme and demonstrate high reliability of the measurement results. This provides a solid foundation for further research on the properties of SeF₆.更多还原