2004 Fiscal Year Final Research Report Summary
New Electromagnetic Measurement Using High-Temperature Superconducting Coil
| Project/Area Number |
14208054
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
YAMAZAKI Kozo National Institute for Fusion Science, Department of Large Helical Device, Professor, 大型ヘリカル研究部, 教授 (50115648)
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| Co-Investigator(Kenkyū-buntansha) |
YANAGI Nagato National Institute for Fusion Science, Department of Large Helical Device, Professor, 大型ヘリカル研究部, 助教授 (70230258)
SAKAKIBARA Satoru National Institute for Fusion Science, Department of Large Helical Device, Professor, 大型ヘリカル研究部, 助手 (90280594)
NARUSHIMA Yoshiro National Institute for Fusion Science, Department of Large Helical Device, Professor, 大型ヘリカル研究部, 助手 (40332184)
MITO Toshiyuki National Institute for Fusion Science, Department of Large Helical Device, Professor, 大型ヘリカル研究部, 教授 (10166069)
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| Project Period (FY) |
2002 – 2004
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| Keywords | long-time electromagnetic measurement / plasma diamagnetism / high-temperature superconductivity / magnetic fusion / helical device |
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| Research Abstract |
In order to realize safe and economic fusion reactors, steady-state plasma operation is required. In this case, rea-time measurement of plasma energy and the feedback control of magnetic configuration is important. For the real-time plasma energy measurement, conventional diamagnetic sensors has been used so far. To apply this to long-pulse operations, new ideas or R&D's are required.
For steady-state and real-time measurement of plasma energy there are several methods ; (1)conventional diamagnetic sensor, (2)the utilization of super-conducting coil system, and (3)novel method utilizing high-temperature superconducting sensor systems. Especially, we have been developing novel methods for helical confinement systems.
In the case of method (1),it is impossible to measure more than several tens of minutes due to the property of integral circuits. In case (2),it is not easy to measure the plasma energy because of noise from coil power supply and SCR, especially in the case of the normal conducting coil system
In this research, R&D of the measurement of the utilization of low-temperature superconducting coil in the Large Helical Device (LHD) has been carried out. The demonstration of the diamagnetic measurement method using the high-temperature superconducting sensor Bi2223 has been demonstrated. Moreover, as an extension of this Grand-In-Aid Research, a novel compact and spherical helical magnetic configuration has been explored.
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[Book] プラズマの本2004
Author(s)
山崎耕造
Total Pages
160
Publisher
日刊工業新聞社
Description
「研究成果報告書概要(和文)」より
