Development of Integrated Direct Current Superconducting Quantum Interference Device Gradiometer for Nondestructive Evaluation
Development of Integrated Direct Current Superconducting Quantum Interference Device Gradiometer for Nondestructive Evaluation
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无损评价集成直流超导量子干涉仪梯度仪研制
DOI：
10.1143/jjap.35.l486
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发表时间：
1996
影响因子：
1.5
通讯作者：
Tatsuaki Ataka Kasai
中科院分区：
文献类型：
--
作者：
T. Morooka;S. Nakayama;A. Odawara;N. Shimizu;K. Chinone;Tatsuaki Ataka Kasai
研制了一种用于无损检测的直流超导量子干涉器件(DC-SQUID)梯度仪。在一个3×3mm2的硅片上集成了一个拾取线圈和一个DC-SQUID。为了提高梯度仪的空间分辨率，采用同面同心二阶导数线圈作为拾取线圈。该拾取线圈由一个单圈外线圈和一个四圈内线圈串联而成，并相互逆时针连接。外圈直径为2 mm，内圈直径为1 mm。拾取线圈的大小是通过计算相对于低温恒温器底部厚度的空间分辨率来确定的。实验证实了DC-SQUID梯度仪的高空间分辨率。
A Direct Current Superconducting Quantum Interference Device (DC-SQUID) gradiometer for nondestructive evaluation was developed. A pick-up coil and a DC-SQUID were integrated on a 3×3 mm2 Si chip. In order to raise the spatial resolution of the gradiometer, a coplanar concentric second-order derivative coil was adopted as a pick-up coil. The pick-up coil consisted of a one-turn outer coil and a four-turn inner coil connected in series and counterclockwise to each other. The diameters of the outer coil and the inner coil were 2 mm and 1 mm, respectively. The size of the pick-up coil was determined by calculating the spatial resolution in relation to the bottom thickness of the cryostat. The high spatial resolution of the DC-SQUID gradiometer was experimentally confirmed.