| 实用高温超导MCG系统研究 |
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| 引用本文： | 汝鸿羽,齐亮,马平,谢飞翔,聂瑞娟,王福仁,戴远东.实用高温超导MCG系统研究[J].低温物理学报,2005,27(1):690-695. |
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| 作者姓名： | 汝鸿羽 齐亮 马平 谢飞翔 聂瑞娟 王福仁 戴远东 |
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| 作者单位： | 北京大学物理学院 人工微结构和介观物理国家重点实验室,,北京100871 |
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| 基金项目： | 国家自然科学基金（批准号：10274004）、国家高技术研究发展计划（批准号：2002AA306412）、国家重点基础研究专项经费（批准号：2006CB601007）资助的课题. |
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| 摘 要： | 本文研究了一种自建的低成本简易磁屏蔽室及其操控条件，提出了能被高温超导rf SQUID仪器所接受的简易磁屏蔽室，并且运用由该磁屏蔽室和rf SQUID梯度计所构成的组合系统测量了微弱的生物磁信号．研究结果表明，该磁屏蔽室能够有效降低电磁干扰，确保SQUID长时稳定工作，基于该磁屏蔽室的复合MCG测量系统具备捕捉微弱生物磁信号的能力，且所得信号具有可接受的信噪比．这将使得开发一种低造价的实用高温超导MCG测量系统成为现实．
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| 关 键 词： | MCG SQUID 梯度计 磁屏蔽 |
| 收稿时间： | 04 2 2005 12:00AM |
THE STUDY ON A PRACTICAL HIGH TEMPERATURE SUPERCONDUCTING MCG SYSTEM |
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| RU HONG-YU,QI LIANG,MA PING,XIE FEI-XIANG,NIE RUI-JUAN,WANG FU-REN,DAI YUAN-DONG.THE STUDY ON A PRACTICAL HIGH TEMPERATURE SUPERCONDUCTING MCG SYSTEM[J].Chinese Journal of Low Temperature Physics,2005,27(1):690-695. |
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| Authors: | RU HONG-YU QI LIANG MA PING XIE FEI-XIANG NIE RUI-JUAN WANG FU-REN DAI YUAN-DONG |
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| Institution: | State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871 |
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| Abstract: | In this paper, a kind of simple magnetic shielding room developed by our lab was investigated, which can be accepted by high temperature rf SQUID system. And the operation conditions of this shielding room were also researched. In addition, a weak biomagnetic signal was measured by the complex system made of rf SQUID and the shielding room. The results show that this shielding room can decrease electromagnetic interference effectively and ensure SQUID gradiometer to work stably in a long period. The complex MCG system based on this shielding room is able to detect weak biomagnetic signals and the resultant signals present acceptable S/N ratio. The current research makes it possible to develop a practical low cost high temperature MCG system. |
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| Keywords: | MCG SQUID gradiomagnetometer magnetic shielding |
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