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裂变电离室在工作时,其内部气体中持续地发生着电离和复合过程。为了进一步了解这些过程对探测性能的影响,需要从等离子体物理的角度来研究裂变电离室。借助BOLSIG+以及电流模式下微型裂变电离室的基本理论模型,计算了电极的几何尺寸、裂变率以及气体电离度等参数对探测器饱和区电压范围的影响,并对结果进行了讨论。此外,根据不同电离度情况下的计算结果,对高温导致探测器饱和区电压范围变小这一现象给出了一种可能的解释。
Fission ionization chamber in the work, the internal gas in the ongoing ionization and compounding process. In order to further understand the impact of these processes on detection performance, it is necessary to study the fission ionization chamber from a plasma physics point of view. The influence of electrode geometry, fission rate and gas ionization degree on the voltage range of detector saturation region was calculated by using the basic theoretical model of BOLSIG + and current mode micro-fission ionization chamber. The results were discussed. In addition, according to the calculation results under different degrees of ionization, a possible explanation is given for the phenomenon that the voltage range of the saturation region of the detector decreases due to the high temperature.