SQUID magnetometer utilizing normal pickup coil and resonant-type coupling circuit

被引：12
|
作者：
Yang, TQ [1 ]
Enpuku, K [1 ]
机构：
[1] Kyushu Univ, Dept Elect, Higashi Ku, Fukuoka 8128581, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 392卷
关键词：
high T-c SQUID; resonant coupling; cooled pickup coil; flux noise;
D O I：
10.1016/S0921-4534(03)00849-9
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have developed a high T-c superconducting quantum interference device (SQUID) magnetometer utilizing a Cu pickup coil cooled to T = 77 K and a resonant-type coupling circuit. The thermal noise can be decreased by cooling the pickup coil, while the signal transferred to the SQUID can be increased by using the resonant-type coupling circuit. Four pickup coils with different radii were used in the experiment. For the pickup coil with a radius r = 15 mm and the number of turns n = 150, we obtained the magnetic field noise of S-B(1/2) = 26 fT/Hz(1/2) at the resonant frequency of f(r) = 6.37 kHz. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：1396 / 1400
页数：5
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