A QUASIPARTICLE-TRAP-ASSISTED TRANSITION-EDGE SENSOR FOR PHONON-MEDIATED PARTICLE DETECTION
A QUASIPARTICLE-TRAP-ASSISTED TRANSITION-EDGE SENSOR FOR PHONON-MEDIATED PARTICLE DETECTION
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DOI：
10.1063/1.1146105
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发表时间：
1995-11
影响因子：
1.6
通讯作者：
K. Irwin;S. Nam;B. Cabrera;B. Chugg;Betty A. Young
中科院分区：
文献类型：
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作者：
K. Irwin;S. Nam;B. Cabrera;B. Chugg;Betty A. Young
我们已经展示了复合超导钨和铝转变边缘传感器的操作，该传感器利用了准粒子俘获和电热反馈。我们将这些器件称为W/Al QET（准粒子俘获辅助电热反馈转变边缘传感器）。准粒子俘获机制使得在不增加传感器热容量的情况下对大表面积进行检测成为可能，从而允许使用更大的吸收体并减少声子收集时间。该传感器由沉积在高纯度硅衬底上的厚度为30纳米、临界温度约为80毫开尔文的超导钨薄膜组成。钨薄膜被图案化为200个平行线段，每个线段宽2微米，长800微米。八个超导铝薄膜焊盘与每个线段电连接，并且覆盖的表面积比钨大得多。当来自硅晶体中粒子相互作用的声子撞击铝焊盘时，库珀对被打破，形成准粒子，这些准粒子扩散到……
We have demonstrated the operation of composite superconducting tungsten and aluminum transition‐edge sensors which take advantage of quasiparticle trapping and electrothermal feedback. We call these devices W/Al QETs (quasiparticle‐trap‐assisted electrothermal feedback transition‐edge sensors). The quasiparticle trapping mechanism makes it possible to instrument large surface areas without increasing sensor heat capacity, thus allowing larger absorbers and reducing phonon collection times. The sensor consists of a 30‐nm‐thick superconducting tungsten thin film with Tc∼80 mK deposited on a high‐purity silicon substrate. The W film is patterned into 200 parallel lines segments, each 2 μm wide and 800 μm long. Eight superconducting aluminum thin film pads are electrically connected to each segment, and cover a much larger surface area than the W. When phonons from particle interactions in the silicon crystal impinge on an aluminum pad, Cooper pairs are broken, forming quasiparticles which diffuse to the tun...