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幕内 悦予*; 阿部 雄太; 長山 咲子*; 岡崎 航大*; 川上 智彦*; Sun, Y.*; 大石 佑治*; 大高 雅彦
no journal, ,
A boride is an interesting material that has both metallic and ceramic properties (high melting point/ hardness, corrosion resistance, electrical/thermal conductivity), which are known to be hard material dependent on boron concentration. In this study, a feasibility of LIBS system as an in-situ measurement for hardness of MxBy (M: Zr, Fe) was studied in two steps; i) the actual survey of hardness characteristics of MxBy using various specimens changing boron concentration, and ii) the identification performance of composition ratio of LIBS.
若井田 育夫; 大場 弘則; 中西 隆造; 赤岡 克昭; 柴田 卓弥; 狩野 貴宏
no journal, ,
Remote analysis by optical fiber base Laser Break down Spectroscopy (LIBS) has been developed and successfully performed under a radiation of 10kGy/h and total dose more than MGy. A simple pollution protection unit with a cleaned air ventilation system has been installed to the previously developed portable optical fiber LIBS system, and also the Remote controlled XYZ Sample Stage for LIBS Probe has been combined for the challenge at the actual working site in FDNPS where air contamination will be undeniable. The dose rate of the working environment was about 10
Sv/h, and the maximum surface dose rate of the sample was about 20mSv/h. The ablation fumes induced by laser irradiation has a high potential to make a internal exposure when they are mixed with human breath air. The special filtering system based on the medical surgical smoke removal technology has been constructed and succeeded to remove the ablation fumes.