Differential Absorption lidar for volcanic gas distribution

2015 Fiscal Year Final Research Report

• Project/Area Number: 15K12468
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Social systems engineering/Safety system
• Research Institution: Chiba University
• Principal Investigator: Shiina Tatsuo 千葉大学, 融合科学研究科(研究院), 准教授 (80304187)
• Co-Investigator(Renkei-kenkyūsha): Kuze Hiroaki 千葉大学, 環境リモートセンシング研究センター, 教授 (00169997)
• Project Period (FY): 2015-04-01 – 2016-03-31
• Keywords: 硫化水素 / ライダー / 吸収 / 波長変調分光法 / 柱密度

Outline of Final Research Achievements

In this study, our purpose is to develop the compact differential absorption lidar for the monitoring of H2S gas distribution within 1km. H2S gas is highly toxic volcanic gas. We used the 1.5μm-band DFB-LD and a fiber amplifier as a lidar light source. The wavelength modulation spectroscopy was adapted. 2-demensional Scanning trucker was installed, too. The column density against the ground was quantitatively estimated. As the results of concrete experiment, H2S gas cells of 1,000ppm・m and 100ppm・m were measured and its column density estimation were evaluated.

Free Research Field

ガス計測