Systematic Study of Micro-stability of Superconducting Magnets

超导磁体微观稳定性的系统研究

基本信息

批准号：
05452180
负责人：
SATOW Takashi
金额：
$ 2.43万
依托单位：
National Institute of Fusion Science (NIFS)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

项目摘要

9.1 Micro-stability of Tightly-wound Superconducting MagnetsIn order to recognize of the adaptable regime of the stability theory (Paper No.1), two non-impregnated coils with a winding inside diameter of 90 mm were made as parameters of copper-superconductor ratios. Their quench and heated tests were carried out, and their winding current densities and limited disturbances were measured.The coefficient of thermal expansion of a GFRP former was measured. Stability of the magnets will be analyzed by the use of this datum and strains measured by the coil tests.9.2 Micro-stability of CICC MagnetsThe practical design criterion for CICC magnets (Paper No.4) was applied to three pairs of poloidal coils for the Large Helical Device (LHD) of NIFS.The lower Inner Vertical (IV-L) Coil (Papers No.5 and No.6) was successfully tested up to the rated current of 20.8 kA without a quench. It is considered that the design criterion is reasonable and no-insulation on the conductor surface is good for stability.Short samples of CICC for LHD and two-stranded samples were tested to research current-distribution instability of CICC,and limited disturbance densities were measured.9.3 Micro-stability of Cryogenic MagnetsAnalysis of limited disturbance densities were carried out for cryogenic magnets. The equivalent current of disturbance was proposed for a stability criterion.9.4 Scaling Law for Superconducting MagnetsThe stored energy dependence of winding current densities of many superconducting magnets were investigated and the scaling laws were obtained empirically and theoretically.

9.1紧密连接的超导磁铁的微观稳定性命令以识别稳定理论的适应性状态（第1号纸），两个未浸渍的线圈具有90 mm的内部直径为90 mm 。进行了淬火和加热测试，并测量了它们的绕组电流密度和有限的干扰。测量了GFRP前者的热膨胀系数。磁铁的稳定性将通过使用该基准和通过线圈测试测量的应变进行分析。9.2CICC磁铁的微观稳定性CICC磁铁的实际设计标准（第4纸）用于三对poloidal盘子NIF的大型螺旋装置（LHD）。下部垂直（IV-L）线圈（第5号和第6号纸）已成功测试至没有淬火的额定电流为20.8 ka。据认为，设计标准是合理的，并且在导体表面上没有合法性对LHD的CICC样品和两链样品进行了测试以研究CICC的电流分布不稳定性，并测量了有限的干扰密度。 .9.3对于低温磁体进行了有限干扰密度的低温磁分析的微观稳定性。提出了针对稳定性标准的扰动的等效电流。4.4用于超导磁体的缩放定律研究了许多超导磁体的绕组电流密度的储存能量依赖性，并从经验上和理论上获得了缩放定律。