聚变堆真空室驻留氢同位素的激光诱导击穿光谱分析进展

Progress of laser induced breakdown spectroscopy for the determination of retained hydrogen isotopes invacuum chamber of a fusion reactor

聚变堆运行过程中,粒子流和能量流轰击真空室表面形成的沉积层是造成氢同位素驻留的重要原因。由于真空室苛刻的检测要求,采用非接触式分析,无需样品前处理的激光诱导击穿光谱(Laser Induced Breakdown Spectroscopy,LIBS)技术成为真空室驻留氢同位素分析的有力手段。作为传统氢同位素分析手段的重要补充,LIBS可为包层结构及驻留氢同位素去除工艺优化提供有力的技术支持。

The deposition layer,formed by the bombardment of particle beam and energy flux on the vacuum chamber surface during operation of fusion reactor,is a significant contributor to hydrogen-isotope retention. For the severe detection requirements of vacuum chamber,Laser Induced Breakdown Spectroscopy（ LIBS）,which is characteristics of no sample pretreatment and non-contact detection,becomes an effective way for the determination of hydrogen isotopes retained on the inner wall of vacuum chamber. As an important supplement of the traditional means for hydrogen isotopes analysis,LIBS can provide powerful support for the optimization of breeding module structure and hydrogen isotope removal process.