Abstract Spatially resolved and temporally integrated vacuum ultraviolet laser induced breakdown spectroscopy (VUV LIBS) was used for contaminant analysis in thermally aged oil impregnated pressboard (OIP) insulation material taken from high voltage transformers. The signature of copper sulphide contamination was obtained through detection of copper and sulphur emission lines. The plasma emission also contained highly ionized oxygen and carbon emission lines. In contrast to the UV-VIS spectral region, sulphur emission lines were found to be strong in the VUV region. The concentration of sulphur was found to increase with the duration of ageing of the OIP material.

中文翻译：

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用于检测热老化变压器绝缘材料中硫的真空紫外激光诱导击穿光谱

摘要 空间分辨和时间积分真空紫外激光诱导击穿光谱（VUV LIBS）被用于高压变压器热老化油浸纸板（OIP）绝缘材料中的污染物分析。硫化铜污染的特征是通过检测铜和硫排放线获得的。等离子体发射还包含高度电离的氧和碳发射线。与 UV-VIS 光谱区域相反，发现硫发射谱线在 VUV 区域很强。发现硫的浓度随着 OIP 材料老化的持续时间而增加。