Four-Channel Current-Biased Kinetic InductanceDetectors Using MgB2 Nanowires for Sensing PulsedLaser Irradiation
Four-Channel Current-Biased Kinetic InductanceDetectors Using MgB2 Nanowires for Sensing PulsedLaser Irradiation
复制标题
使用 MgB2 纳米线感应脉冲激光辐射的四通道电流偏置动感电感探测器
DOI：
10.1007/s10909-014-1135-3
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Ishida
中科院分区：
文献类型：
--
作者：
N. Yoshioka;Y. Narukami;S. Miyajima;H. Shishido;A. Fujimaki;S. Miki;Z. Wang;T. Ishida
我们最近提出了一种新型的超导探测器的想法，即电流偏置的动力学电感探测器(CB-KID)。该探测器不同于以前研究的电流偏置的跃迁边缘探测器，它能够在恒定的直流偏置电流下检测由(；动力学电感，；库珀对的质量，；库珀对的密度，；库珀对的电荷，；器件长度，；横截面积)给出的动态电感的变化。在目前的工作中，我们首先将这一想法扩展到由200 nm厚的镁薄膜曲折线和3米细线组成的多通道CB-KIDS阵列。我们利用聚焦脉冲激光在4K下成功地观测到了四通道CB-KILD的清晰成像信号。扫描激光光斑可以由XYZ压电驱动工作台和带有非球面聚焦透镜的光纤来实现。我们可以在4℃下看到所有4个通道的典型信号，并得到信号在XY平面上的等高线位置依赖关系。通过利用B和冷中子之间的核反应释放的能量，我们的CB-KILDS可以用作中子探测器。
We recently proposed the idea of a novel sort of superconducting detector, i.e., a current-biased kinetic inductance detector (CB-KID). This detector is different from a current-biased transition edge detector studied previously, and is able to sense a change in kinetic inductancegiven by(; kinetic inductivity,; mass of Cooper pair,; density of Cooper pairs,; charge of Cooper pair,; length of device,; cross sectional area) under a constant dc bias current. In the present work, we first extend this idea to construct a multi-channel CB-KIDs array made of 200-nm-thick MgBthin-film meanderline with 3-m thin wire. We succeeded in observing clear signals for imaging from the four-channel CB-KIDs at 4 K by irradiating focused pulsed laser. A scanning laser spot can be achieved by an XYZ piezo-driven stage and an optical fiber with an aspheric focused lens. We can see typical signals from all 4 channels at 4 K, and obtain the positional dependence of the signal as the contour in XY plane. Our CB-KIDs can be used as neutron detectors by utilizing energy released from a nuclear reaction betweenB and cold neutron.