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本文是超导的空间应用七篇文章的第三篇。超导量子干涉器件(SQUID))常用于高灵敏度的磁强计和梯度计中,在灵敏度、频率响应、磁测范围和线性特性方面,它们均优于所有它类磁场传感器。对测量空间的低电平磁场变化,诸如太阳风的起伏和行星场大大小小尺度空间的反常,它们很有潜力。这类器件亦可作检流计和放大器,对于类似低阻抗热辐射计这类要求极高灵敏电压的放大器,它们特别有用。在与低频传感器的连接中,由超导性可研制出某些附加器件,如理想的磁屏蔽和磁通变压器,且后者正被广泛采用,亦包括用于完美的耦合环阵列结构。
This article is the third of seven articles in the field of superconductivity. Superconducting Quantum Interference Devices (SQUIDs) are commonly used in high-sensitivity magnetometers and gradiometers and are superior to all other magnetic field sensors in terms of sensitivity, frequency response, magnetometer range, and linearity. There is great potential for low-level magnetic field changes in the measurement space, such as fluctuations in the solar wind and anomalies in large and small planetary spaces. These devices can also be used as galvanometers and amplifiers, which are particularly useful for amplifiers such as low-impedance thermal radiometers that require extremely high sensitivity voltages. In connection with low-frequency sensors, certain additional devices, such as ideal magnetic shields and flux transformers, are being developed from superconductivity, and the latter is in widespread use, including for perfect coupling ring array structures.