本文叙述了用电探针测量预试环电子温度T_e和电子密度n_e时空分布的实验。结果表明,T_e和n_e在等离子体边缘区域下降很快,与等离子体内部区域相比,n_e小一个量级。此外,通过离子流波形的测量,观察到在等离子体电流快消失时,在孔栏阴影区域的离子流波形出现一个峰值。 This paper describes the experiment of measuring the spatio-temporal distribution of pre-test ring electron temperature T_e and electron density n_e using electric probe. The results show that T_e and n_e decrease rapidly in the edge region of the plasma, and n_e is one order of magnitude smaller than the internal region of the plasma. In addition, the ion current waveform was observed to show a peak in the ion current waveform in the shaded area of ​​the aperture column when the plasma current quickly disappeared.