Development of integrated direct current superconducting quantum interference device gradiometer for nondestructive evaluation

被引：19

作者：

Morooka, T ^{[1
]}

Nakayama, S ^{[1
]}

Odawara, A ^{[1
]}

Shimizu, N ^{[1
]}

Chinone, K ^{[1
]}

Ataka, T ^{[1
]}

Kasai, N ^{[1
]}

机构：

[1] ELECTROTECH LAB,SAKURA,IBARAKI 305,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1996年 / 35卷 / 4B期

关键词：

DC-SQUID; gradiometer; nondestructive evaluation; coplanar concentric second-order derivative coil; spatial resolution; standoff distance;

D O I：

10.1143/JJAP.35.L486

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 x 3 mm(2) 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.

引用

页码：L486 / L488

页数：3

共 8 条

[1] DESIGN AND OPERATION OF SQUID-BASED PLANAR GRADIOMETERS FOR NONDESTRUCTIVE TESTING OF FERROMAGNETIC-PLATES [J].