| Project/Area Number |
61850046
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
電力工学
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| Research Institution | Faculty of Engineering, Yokohama National University |
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Principal Investigator |
TSUKAMOTO O. Faculty Engineering, Yokohama National University, 工学部, 教授 (30017975)
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| Co-Investigator(Kenkyū-buntansha) |
稲田 浩一 藤倉電線株式会社, 開発部長
HIRABAYASHI H. High Energy Physics Labolator, 教授 (90013383)
KOKUBUN Y. Faculty Engineering, Yokohama National University, 工学部, 助教授 (60134839)
INADA K. Fujikura Electric Wire Co.
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1987: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1986: ¥3,400,000 (Direct Cost: ¥3,400,000)
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| Keywords | Detection of quench / Superconducting Magnet / 超電導マグネット |
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| Research Abstract |
We have developed a quench detecting technique with a dual-core optical fiber< The fiberf has two single-mode optical cores in one fiber.
We performed a basic experiment and demonstrated that a temperauture rise of 1.0 K could be detected at 4.2 K by this dual-core optical fiber Sensitivity of this technique can be improvel by using a longer fiberf and a more sensitive detector of the interference fiber shifts. Using this technique, it was demonstrated that a quench was detectbable. The optical fiber placed in a magnet in a magnet winding is subject to stresses by electromagnetic force. There is a possibility that the interference fringes shift due to the electromagnetic stress. In the experiment, it was also demonstrated that the electromagnetic force-stress did not shift the interference fringes.
A quench detector using this optical method is immune from electromagnetic noises and free from troubles caused by high voltage tension. Porblems arising when applying this technique to a large scale magnet and a possible improving technique in the instrumentation are discussed.
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