Radiation dose rate effects on the properties of a laser-induced breakdown spectroscopy system developed using a ceramics micro-laser for fiber-optic remote analysis
Radiation dose rate effects on the properties of a laser-induced breakdown spectroscopy system developed using a ceramics micro-laser for fiber-optic remote analysis
复制标题
辐射剂量率对使用陶瓷微激光器开发的用于光纤远程分析的激光诱导击穿光谱系统性能的影响
DOI：
10.1080/00223131.2020.1854880
复制
发表时间：
2020
影响因子：
1.2
通讯作者：
I. Wakaida
中科院分区：
文献类型：
--
作者：
K. Tamura;H. Ohba;M. Saeki;T. Taguchi;Hwan;T. Taira;I. Wakaida
摘要：研究了辐射剂量率对采用单片 Nd:YAG/Cr:YAG 复合陶瓷的紧凑型光纤激光诱导击穿光谱 (LIBS) 系统性能的影响，以便在危险环境中进行远程分析。为了研究辐射对 LIBS 信号的影响，测量了与 Nd:YAG 激光器操作相关的特性，如振荡阈值、输出能量、振荡定时、时间脉冲形状和光束轮廓，作为 0 至 10 kGy/hr 的辐射剂量率的函数，考虑到它们对信号的影响。在辐照下测量了金属锆的 LIBS 光谱。尽管信号强度因辐射而大大降低，但即使在最大辐射剂量率下也能很好地获得信息丰富的光谱。从激光特性中LIBS相关参数的比较来看，信号的降低主要归因于脉冲能量的降低。在照射过程中还测量了陶瓷的闪烁发射光谱，其中信号强度随剂量率线性增加。结果表明，所开发的系统适用于核燃料碎片检查等危险环境中辐射剂量率的有效远程元素分析和监测。
ABSTRACT Radiation dose rate effects on the properties of a compact fiber-optic laser-induced breakdown spectroscopy (LIBS) system with a monolithic Nd:YAG/Cr:YAG composite ceramics were investigated for remote analysis in a hazardous environment. To investigate radiation effects on the LIBS signal, properties related to the Nd:YAG laser operation such as oscillation threshold, output energy, oscillation timing, temporal pulse shape, and beam profile was measured as a function of the radiation dose rate from 0 to 10 kGy/hr in view of their influences to the signal. LIBS spectra of zirconium metal were measured under irradiation. Although signal intensity decreased considerably by irradiation, informative spectra were well obtained even at the maximum radiation dose rate. From the comparison of the LIBS-related parameters among the laser properties, the signal reduction was mainly ascribed to the pulse energy reduction. Scintillation emission spectra were also measured from the ceramics during the irradiation, where the signal intensity increased linearly with the dose rate. The results show that the developed system is applicable to effective remote elemental analysis and monitoring of radiation dose rate in hazardous environments such as nuclear fuel debris inspection.