Development of tramp element detector for scrap iron

搭建了低压激光诱导等离子体发射光谱室，作为脉冲元素探测器。为了引导高功率激光束进入腔室，对使用介质反射镜的光学系统和使用芯径为1mm的光纤系统进行了测试。目前，由于光纤的击穿，高功率激光束无法通过光纤进行引导，因此本实验采用了介电介质介质光学系统。用涂漆钢板和镀锌钢板作为废铁的模型。利用该系统可以在短时间内获得钢板表面镀层的定性信息。其次，研制了新的励磁源（不稳定元件检测器）。在本实验中，利用光纤引导二极管泵浦YAG激光器产生的中功率激光束进行激光烧蚀，并用He辉光放电等离子体激发生成的样品原子。上述研究的详细内容发表在论文、讲座会议和国际会议上。

The chamber for the low-pressure laser-induced plasma emission spectrometry, which is used as a tramp element detector was constructed. To guide a high power laser beam into the chamber, the optical system using dielectric mirror and the system using an optical fiber (core diameter:1mm) were tested. To date high power laser beam could not be guided by an optical fiber due to the breakdown of the optical fiber, so the optical system using dielectric minor was used for this experiment. Painted steel plates and Zn plated steel plate were used as a model of scrap iron. By using this system, qualitative information about the surface coatings of the steel plates could be obtained in a short time. Next new excitation source (tramp element detector) was developed. In this experiment, laser beam of medium power from diode-pumped YAG laser was guided by a optical fiber for laser ablation and generated sample atoms were excited by a He glow-discharge plasma. Details of the above-mentioned research were published in paper, in lecture meeting and in international conference.