The electron attachment is studied using a Frisch-grid ionization chamber (GIC) with different number densities of O₂ in the working gas and different reduced electric fields. The influence of the electron attachment on the cathode–anode two-dimensional amplitude spectrum of the GIC is measured and evaluated. The method of measuring the attachment probability per unit time using the GIC is established. The quantitative and systematic relationships between the attachment probability per unit time and the number density of O₂ and the reduced electric field are obtained from experiments, where the number densities of O₂ are from 0 to 2.29 $\times$ 10¹⁷ cm ⁻³ and the reduced electric fields are from 22 to 577 V/cm/bar. The three-body attachment coefficients of O₂ at different mean electron energies (< 1 eV) are measured, which are consistent with those from previous works. For the first time, the three-body attachment coefficients of CO₂ at different mean electron energies (<1 eV) are measured. It is found that the three-body attachment coefficients of O₂ and CO₂ are nearly the same at the same mean electron energy.

使用具有不同数量密度的工作气体中的 O ₂和不同还原电场的弗里施网格电离室 (GIC) 研究电子附着。测量和评估了电子附着对 GIC 阴极 - 阳极二维振幅谱的影响。建立了使用GIC测量单位时间依恋概率的方法。实验得到了单位时间附着概率与O ₂数密度和还原电场之间的定量和系统关系，其中O ₂数密度为0～2.29 $\times$ 10 ¹⁷ cm ^-3和减小的电场为22至577 V/cm/bar。测量了不同平均电子能量 (< 1 eV)下 O ₂的三体附着系数，这与以前的工作一致。首次测量了不同平均电子能量 (<1 eV)下 CO ₂的三体附着系数。发现在平均电子能量相同的情况下，O ₂和CO ₂的三体附着系数几乎相同。