对于SQUID (超导量子干扰装置) 梯度计的一种双功能的超导屏蔽
Guangxin Han1, Kaiyuan Song1, Yuntao Qiu1
1National Gravitation Laboratory, MOE Key Laboratory of Fundamental Physical Quantities Measurement, and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
The Review of scientific instruments
|February 13, 2026
概括
我们开发了一种新型的双功能超导盾,以保护超导量子干扰装置 (SQUID) 免受磁干扰,并提高稳定性. 这种实用解决方案提高了SQUID梯度计在各种应用中的可靠性.
科学领域:
- 应用物理 应用物理
- 超导装置的超导器件
- 磁力学测量是一种磁力学测量.
背景情况:
- 超导量子干扰装置 (SQUID) 是敏感的磁力计,易受外部磁场的影响.
- 在SQUID梯度计中,皮卡线圈不平衡会影响测量的准确性和稳定性.
- 现有的屏蔽方法往往缺乏动态补偿的适应性.
研究的目的:
- 设计和验证用于SQUID保护的新型双功能超导屏.
- 为了通过可调节的轴移位来弥补拾取线圈不平衡.
- 为了提高SQUID梯度计的稳定性和可靠性,用于实际应用.
主要方法:
- 设计和制造一个双功能的超导屏蔽.
- 与原型低温SQUID梯度计 (150毫米基线,105毫米2线圈面积) 的集成.
- 实验验证包括内在噪声测量和在移动平台上的动态测试.
主要成果:
- 在0.1-1Hz时达到大约50 fT/m/√Hz的内在噪声水平.
- 在动态测试期间在强磁干扰下经过稳定的操作.
- 验证了双功能屏蔽在保护SQUID和补偿线圈不平衡方面的有效性.
结论:
- 这种新型的双功能超导屏幕有效地保护SQUIDs免受磁干扰.
- 可调节的轴位移允许精确补偿拾取线圈不平衡.
- 这项技术为电线绕的SQUID梯度计提供了实际的增强,提高了它们的稳定性和可靠性.
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