液冷却的高纯度铜线圈用于产生长脉冲磁场
Yoshimitsu Kohama1, Yoshihiko Ihara2, Zhuo Yang1
1Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
The Review of scientific instruments
|July 6, 2023
概括
研究人员使用高纯度铜线圈开发了一种用于长时间脉冲磁场的低能耗系统. 将线圈冷却到液温度,显著提高了磁场强度和持续时间.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
背景情况:
- 产生长时间脉冲磁场通常需要大量的能量.
- 高纯度的金属具有较低的电阻,特别是在低温下.
研究的目的:
- 开发一个实用的设置,用于产生长时间脉冲磁场,低能耗.
- 为了研究高纯度铜线圈在低温下对脉冲磁场生成的性能.
主要方法:
- 一个使用99.9999%纯铜线圈的电磁铁被建造.
- 在各种温度下测量了线圈的阻力 (300K,77.3K,4.2K).
- 使用电双层电容器银行产生脉冲磁场.
主要成果:
- 铜线圈的电阻在低温下大大降低 (例如,在4.2K时<0.15 mΩ),表明其残余电阻比率高 (1140).
- 实现了19.8 T的脉冲磁场,持续时间超过1秒.
- 与液冷却相比,液冷却的结果大约是场强度的两倍.
结论:
- 高纯度铜线圈的低温运行大大降低了朱尔损耗,使得磁场的强度和脉冲时间更长.
- 证明的低能耗和高性能要求进一步研究由高纯度金属制成的低阻抗脉冲磁铁.
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