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New Electromagnetic Measurement Using High-Temperature Superconducting Coil

使用高温超导线圈的新型电磁测量

基本信息

批准号：
14208054
负责人：
YAMAZAKI Kozo
金额：
$ 23.05万
依托单位：
National Institute for Fusion Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

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 systemIn 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.

为了实现安全、经济的聚变反应堆，需要稳态等离子体运行。在这种情况下，等离子体能量的实时测量和磁配置的反馈控制就很重要。对于实时等离子体能量测量，迄今为止一直使用传统的抗磁传感器。要将其应用于长脉冲操作，需要新的想法或研发。对于等离子体能量的稳态和实时测量，有多种方法；（1）传统的抗磁传感器，（2）超导线圈系统的利用，以及（3）利用高温超导传感器系统的新方法。特别是，我们一直在开发螺旋约束系统的新方法。在方法（1）的情况下，由于积分电路的特性，不可能测量超过几十分钟。在情况(2)中，由于线圈电源和SCR的噪声，测量等离子体能量并不容易，特别是在常导线圈系统的情况下。本研究对大型螺旋装置(LHD)中低温超导线圈的利用测量进行了研发。已经演示了使用高温超导传感器Bi2223的抗磁测量方法。此外，作为这项重大援助研究的延伸，我们还探索了一种新颖的紧凑型球形螺旋磁结构。