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首页> 外文期刊>Philosophical magazine, B. Physics of condensed matter, electronic, optical, and magnetic properties >Use of a dc superconducting quantum interference device as read-out electronics for radiation detectors based on superconducting tunnel junctions
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Use of a dc superconducting quantum interference device as read-out electronics for radiation detectors based on superconducting tunnel junctions

机译：直流超导量子干扰设备用作基于超导隧道结的辐射探测器的读出电子设备

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A new generation of astronomical detectors has recently been developed, on the basis of superconducting tunnel junctions (STJs). STJs are capable of detecting photons in a wide range of wavelengths, from X-rays to infrared; also the counting of single photons in the optical range has been demonstrated. Since these detectors operate at very low temperature (down to 100 mK), a natural candidate for the read-out electronics is the de superconducting quantum interference device (SQUID), an extremely sensitive magnetometer that is fabricated with a similar technology to the Sn junctions. Biasing the STJ at a constant voltage, the current pulse caused by the incoming radiation is passed through the tightly coupled input coil of the SQUID and converted into a magnetic flux signal which can be detected. In this paper we present measurements on a home-made de SQUID, showing the response of the device to current pulses, which simulate the real signals from a Sn. We show how the SQUID performance can be improved by using a superconducting flux transformer, which allows us to detect signal amplitudes of fraction of nanoamperes, such as the signals coming from irradiation of STJs in the near-infrared range. [References: 17]
机译：最近，在超导隧道结（STJ）的基础上，开发了新一代的天文探测器。 STJ能够检测从X射线到红外的各种波长的光子;还证明了光学范围内单光子的计数。由于这些检测器在非常低的温度（低至100 mK）下工作，因此读出电子器件的自然候选者是超超导量子干涉仪（SQUID），这是一种非常灵敏的磁力计，采用与Sn结相似的技术制造。通过以恒定电压偏置STJ，由入射辐射引起的电流脉冲将通过SQUID的紧密耦合输入线圈，并转换为可以检测到的磁通量信号。在本文中，我们介绍了在自制de SQUID上的测量结果，显示了设备对电流脉冲的响应，该电流脉冲模拟了Sn的真实信号。我们展示了如何通过使用超导通量变压器来改善SQUID性能，这使我们能够检测出纳安级分数的信号幅度，例如来自STJ辐射的近红外范围的信号。 [参考：17]

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