| Budget Amount *help |
¥24,960,000 (Direct Cost: ¥19,200,000、Indirect Cost: ¥5,760,000)
Fiscal Year 2015: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2014: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2013: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
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| Outline of Final Research Achievements |
The aim of this research is to develop a technique for in situ, multi-element analysis of natural river, lake and oceanic fluids. The method developed is based on laser-induced breakdown spectroscopy. In this technique, a high power laser pulse of focused into a bulk fluid to generate a plasma. By observing the spectrum of light emitted from the plasma, it is possible to perform realtime element analysis of ionic species dissolved in seawater. In this research, we demonstrated that the technique can be applied to the high-pressure high-temperature environments that exist on the seafloor. Furthermore, we demonstrated that by measuring the shot-to-shot energy of the laser pulse used and monitoring the temporal evolution of each plasma that is generated, it is possible to significantly improve the quantitative performance of the developed method.
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