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Magnetization measurement by use of non-destructive magnet up to 100 Tesla

使用高达 100 特斯拉的无损磁铁进行磁化测量

基本信息

批准号：
07454082
负责人：
KINDO Koichi
金额：
$ 4.22万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

In first year, we pointed out two problems when one makes high field magnets. One problem is making coil tight by epoxy resign is necessary to obtain high field and the other is reinforcement by use of maraging steel from outside increases an effective tensile strength of the magnet wire. Taking these points into consideration, we can produce 60T-field with diameter of 20mm by winding Cu-wire.Second year, we tested the tensile sterength dependence of the maximum field. As a result, we can achieve at 71T within a diameter of 18mm by changing Cu-wire into Cu-Ag-wire.The last year, we checked reproducibility and durability of the 71T-magnet and found that the magnet can produce successive 8 shots of 69T-field. Following this result, we carried out magnetization measurement at liquid helium temperature up to 65T.We set an additive coil in the 71T-magnet to obtain higher magnetic field. Obtained maximum field is 77T with 13.5mm diameter. From our analysis, 77T should be separated into 8T of inner coil and 69T of outer magnet. This is not efficient for outer magnet. Supposed that we cannot neglect an effect from inner coil on outer one, we should obtain higher field by reinforcing inner coil with maraging steel. Obtained maximum field is 80.3T with 10.5mm diameter and this is world record. In this case, outer magnet produces 71T-field and this result can be regarded as an efficient case. Following the results, reinforcement of each coil by maraging steel can realizes 100T-magnet and the subject of this study will be attained in very near future.

第一年，我们指出了制作强磁场磁铁时存在的两个问题。一个问题是通过环氧树脂使线圈紧密以获得高磁场是必要的，另一个问题是通过使用外部马氏体时效钢来增强电磁线的有效拉伸强度。考虑到这些点，我们可以通过缠绕铜线产生直径为20mm的60T磁场。第二年，我们测试了最大磁场的拉伸强度依赖性。因此，通过将铜线改为铜银线，我们可以在直径18mm内实现71T。去年，我们检查了71T磁体的再现性和耐用性，发现该磁体可以连续产生8次69T磁场。根据这一结果，我们在液氦温度高达65T的情况下进行了磁化测量。我们在71T磁体中设置了附加线圈以获得更高的磁场。获得的最大视场为77T，直径为13.5mm。根据我们的分析，77T应该分为内线圈8T和外磁体69T。这对于外磁体来说效率不高。假设我们不能忽略内线圈对外线圈的影响，我们应该通过用马氏体时效钢加固内线圈来获得更高的磁场。获得的最大视场为80.3T，直径10.5mm，这是世界纪录。在这种情况下，外磁体产生71T磁场，这个结果可以被认为是一个有效的情况。根据结果，用马氏体时效钢加固每个线圈可以实现100T磁体，并且本研究的主题将在不久的将来实现。