中文摘要：

为了测量PTS单路样机Marx发生器的输出电压,设计并标定了一个二级分压的水电阻分压器。水电阻分压器设计中需注意在不同介质的分界面及三相点位置产生的局部高电场,采取适当的均压设计可避免绝缘击穿。水电阻分压器用比对法标定,短路实验和100Ω水电阻负载实验的标定结果相差约15%。分析认为误差的原因是标准分压器和Marx发生器输出端的连接线与主回路之间存在互感,造成短路负载情况下标准分压器的测量值低于实际值,导致标定结果出现较大偏差。改进实验线路后标定结果偏差〈3%。

英文摘要：

A water resistor divider for measure the output voltage of PTS Marx-bank had been designed. Because the oil is not full in Marx tank, the electric fields of triple junction of water, oil and air is too high that the pipe of water resistor was destroyed by arcing after shot when output of Marx-bank was over 3 MV. The modification was to cut the length of resistor, leaving the water resistor in oil completely. Another was to add a metal ring on position near the ground of the resistor. No breakdown occurs in late experiment. The water resistor divider was calibrated in situ because resistor was too long. A calibrated divider was joined to the output of Marx-bank. Both dividers were recorded the voltage when Marx-bank shots in lower voltage. The result of the water resistor divider sensitivity is smaller about 15 % when used a short-circuit load than a 100 12 resistor in calibration. The equivalent circuit of calibration was analyzed. The mutual inductance of the wire which connected calibrated divider to output of Marx-bank and the short-circuit load leads the voltage of calibrated divider＇s measure is less than output. So the calculated sensitivity of the water resistor divider is small. The wire was cut and the result of sensitivity is smaller less than 3%. The result of the water resistor divider measurement is accord with V-dot monitors in intermediate-store.