極低温用ビデオスコープの開発:－930 MHz NMR 超伝導マグネットの東日本大震災からの復旧－ [in Japanese] Development of Tools and Instruments for Visualizing in Cryogenics:- Repair of the 930 MHz NMR Magnet Damaged in the Great East Japan Earthquake - [in Japanese]
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The Great East Japan Earthquake, which occurred on March 11, 2011, damaged a superconducting NMR magnet installed in the National Institute for Materials Science (NIMS) in Tsukuba, Japan. We have developed an instrument to visualize a material cooled in cryogenics to repair the magnet. A temperature controlled video scope works well in a helium gas environment and in the vicinity of a liquid helium surface. The instrument enables us to monitor the situation of a material in a low temperature state. Utilizing the instrument, we have succeeded in recovering the electric contact of an electric socket of a superconducting magnet covered with the contaminant of solid air. The socket was dug out using a drill while conducting monitoring using the instrument. Behaviors of solid air in cryogenic instruments for an injection of a helium gas were also visualized.
- TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)
TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 48(12), 607-610, 2013
CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN