National Institute of Polar Research
National Institute of Polar Research
The Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA)
Graduate School of Science, Tohoku University
Graduate School of Science, Tohoku University
Miyagi University of Education
Graduate School of Science, Tohoku University
The Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA)
The Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA)
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構研究開発報告: 大気球研究報告
雑誌名(英)
JAXA Research and Development Report: Research reports on high altitude balloons
A compact cryogenic whole air sampler was developed using Joule-Thomson (J-T) mini cooler. The J-T cooler could produce cooling through the J-T expansion of high-pressure neon gas. The compact sampler used the cooling, thus produced, to collect stratospheric air samples cryogenically. Our laboratory experiments showed the compact sampler could collect air samples of 2.8 and 7.2 L(sub STP) at the sample pressures of 25 and 200 hPa, respectively, in 4 minutes, when the neon gas was supplied from a 2-L cylinder of 19.0 MPa in pressure. Concentrations of CO2 and CH4 and carbon isotope ratio of CH4 of the collected samples were confirmed to be unchanged. A balloon-borne stratospheric air sampling experiment with the compact sampler was conducted at Sanriku Balloon Center on June 4, 2007, resulting that the sampler worked as expected in the stratosphere.
J-Tクーラーを用いた小型成層圏大気クライオサンプラーの開発
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