Experimental imaging diagnosis of superconducting tunnel junction x-ray detectors by low-temperature scanning synchrotron microscope
Experimental imaging diagnosis of superconducting tunnel junction x-ray detectors by low-temperature scanning synchrotron microscope
复制标题
低温扫描同步显微镜超导隧道结X射线探测器实验成像诊断
DOI：
10.1063/1.1331085
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发表时间：
2000
影响因子：
4
通讯作者：
M. Katagiri
中科院分区：
文献类型：
--
作者：
H. Pressler;M. Ohkubo;M. Koike;M. Ukibe;T. Zama;T. Nakamura;M. Katagiri
利用同步辐射产生的直径为5-10 μm的X射线微束，在低温扫描同步辐射显微镜（LTSSM）上对超导隧道结X射线探测器进行了成像诊断。准平行强流同步辐射使人们能够在大约1小时内获得200×200 μ m ~ 2结的全二维图像。的LTSSM结果表明，标准准粒子扩散和边缘损耗模型的空间分布的结响应于X射线是明显不足的中间或大的结（相对于约瑟夫森穿透深度）。在此基础上，有人认为，所提出的模型的信号产生和损失的机制，应重新考虑。
Imaging diagnosis of superconducting tunnel junction x-ray detectors has been performed by an apparatus called the low-temperature scanning synchrotron microscope (LTSSM) using an x-ray microbeam with a diameter of 5–10 μm originated from synchrotron radiation. Quasiparallel intense synchrotron radiation enables one to obtain the full two-dimensional images of junctions with dimensions of 200×200 μm2 in about 1 h. The LTSSM results indicate that the standard quasiparticle diffusion and edge loss model for the spatial distribution of the junction response to x rays is evidently inadequate for intermediate or large junctions (with respect to a Josephson penetration depth). On this basis, it is argued that the models proposed for the signal creation and loss mechanism should be reconsidered.