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Al2O3陶瓷在脉冲电压下的激光触发沿面闪络特性研究

, PP. 314-319

Keywords: 沿面闪络,脉冲电压,激光触发,时延,抖动,空气,真空

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Abstract:

为研究脉冲电压下的激光触发沿面闪络特性,在试验室中建立了精确的激光触发沿面闪络试验系统,解决了激光脉冲与试品上所加脉冲电压的同步问题,在此基础上应用平板电极和柱状绝缘材料进行了激光触发沿面闪络试验.试验中采用铜材料平板电极,试品为Al2O3材料圆柱绝缘材料,试验中激光波长为1064/532nm并聚焦成长方形光斑,得到在不同的激光能量密度及施加电压下的闪络时延和抖动.研究表明激光能量密度越大,施加电压越高,闪络时延和抖动越小;532nm波长激光触发的时延小于1064nm波长激光触发的时延;真空条件下的时延和抖动均小于空气条件下的时延和抖动.

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