SQUID amplifier system for vibrating wire resonators

被引：5

作者：

Martikainen, J ^{[1
]}

Tuoriniemi, JT ^{[1
]}

机构：

[1] Helsinki Univ Technol, Low Temp Lab, FIN-02015 Helsinki, Finland

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2001年 / 124卷 / 1-2期

关键词：

Magnetic Field; Noise Level; Magnetic Material; Gain Factor; Coupling Scheme;

D O I：

10.1023/A:1017554708219

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We describe a simple coupling scheme of superconducting vibrating wire resonators to a SQUID amplifier for achieving supreme signal to noise characteristics. Our construction resulted in a gain factor near 10(8)phi (0)/V at I kHz with an amplifier noise level of about 20 mu phi (0)/root Hz. Extremely small movements of the wires in very small magnetic fields can thus be detected.

引用

页码：367 / 382

页数：16

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