高压电器2025，Vol.61Issue(8)：32-38,7.DOI:10.13296/j.1001-1609.hva.2025.08.004
表面纳米化提升真空开关内激光诱导等离子体信号研究
Research on Laser-induced Plasma Signal Enhancement in Vacuum Circuit Breaker Through Surface Nanocrystallization
摘要
Abstract
In view of the issue of insufficient sensitivity in laser-induced plasma(LIP)technology for live detection of vacuum circuti breaker,in this paper a surface nanocrystallization technique based on gold nanoparticle(Au NP)-enhanced laser-induced plasma is propsoed.The enhancement of Au NPs with varying particle sizes under different delay times on the spectral signals of copper targets at low pressure are systematically investigated.The results show that Au NPs can significantly enhance spectral signals under low-pressure conditions,reducing the detection limit down to 10-4 Pa.The enhancement effect of 5 nm particles at a 100 ns delay time is the most optimal,yielding a maxi-mum enhancement factor of 13.55 and an average enhancement factor of 6.77.With the increase of the pressure,the enhancement effect exhibits a linear decline.However,Au NPs can still effectively mitigate the negative impact of pressure on plasma radiation.Furthermore,Au NPs prolongs the plasma signal duration through localized surface plasmon resonance(LSPR),confining the plasma to the initial expansion stage and improving the fitting accuracy(R2=0.999 8)of the radiation integral intensity.This study has revealed the enhancement mechanisms of Au NPs under low-pressure conditions and provided higher precision for online vacuum detection of vacuum circuti breaker.关键词
激光诱导等离子体/纳米粒子/真空开关/真空度/信号增强/光谱分析/在线检测/局域表面等离子体共振Key words
laser-induced plasma/nanoparticles/vacuum circuit breaker/vacuum degree/signal enhancement/spectral analysis/online monitoring/localized surface plasmon resonance引用本文复制引用
陈家伟,刘佳琪,袁欢,杨爱军,王小华,荣命哲..表面纳米化提升真空开关内激光诱导等离子体信号研究[J].高压电器,2025,61(8):32-38,7.基金项目
国家自然科学基金(51777154). Project Supported by National Natural Science Foundation of China(51777154). （51777154）
