Note: low temperature superconductor superconducting quantum interference device system with wide pickup coil for detecting small metallic particles.
Note: low temperature superconductor superconducting quantum interference device system with wide pickup coil for detecting small metallic particles.
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注：低温超导超导量子干涉装置系统具有宽拾波线圈，用于检测微小金属颗粒。
DOI：
10.1063/1.4739311
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Y. Seki
中科院分区：
文献类型：
--
作者：
A. Kandori;K. Ogata;R. Kawabata;S. Tanimoto;Y. Seki
研制了一个传感面积为10 mm × 190 mm的二阶轴向梯度仪组成的单通道低温超导量子干涉器件系统。梯度仪安装在液氦杜瓦瓶（直径450-mm，长度975-mm）中，拾取线圈与杜瓦尾部表面之间的间隙为12 mm。在高于2hz的白噪声范围内，测量到的磁场灵敏度为16 fT/Hz（1/2）。该系统用于测量通过感应区域的不同尺寸的不锈钢颗粒。通过测量直径为100 μm的SUS304颗粒的1.3 pt磁场，可以很容易地检测到其在大拾取线圈下的不同位置通过。结果表明，该系统适用于锂离子电池等层压片产品的质量控制。
A one-channel low temperature superconductor superconducting quantum interference device system comprising a second-order axial gradiometer with a sensing area of 10 mm × 190 mm was developed. The gradiometer was mounted in a liquid-helium dewar (450-mm diameter; 975-mm length), with a gap of 12 mm between the pickup coil and the dewar-tail surface. The magnetic field sensitivity was measured to be 16 fT/Hz(1/2) in the white noise regime above 2 Hz. The system was used to measure stainless steel particles of different sizes passing through the sensing area. A 100-μm diameter SUS304 particle was readily detected passing at different positions underneath the large pickup coil by measuring its 1.3-pT magnetic field. Thus, the system was shown to be applicable to quality control of lamination sheet products such as lithium ion batteries.