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强流脉冲电子加速器的脉冲形成线,大多数采用去离子水作为贮能绝缘介质,有关水介质绝缘性能的试验研究,国内尚为空白。我们对水介质的绝缘性能进行了试验研究。在同轴线之间充以去离子水作为绝缘介质,在内外电极间加微秒级脉冲高电压。试验结果表明,水介质(电阻率大于2MΩ·cm)本身的击穿场强值与按J.C.Martin公式计算的允许场强值是相符的。
The pulse forming line of the high-current pulsed electron accelerator mostly adopts deionized water as the energy storage insulating medium. The experimental study on the insulating properties of the aqueous medium is still blank in China. We conducted an experimental study on the dielectric properties of aqueous media. Between the coaxial lines filled with deionized water as an insulating medium, plus microsecond-pulse high voltage between the internal and external electrodes. The experimental results show that the breakdown field strength of the aqueous medium (resistivity greater than 2MΩ · cm) itself is consistent with the allowable field strength calculated by the J. C. Martin formula.