Imaging analysis of superconducting transition edge sensors for calorimeters
Imaging analysis of superconducting transition edge sensors for calorimeters
复制标题
热量计超导过渡边缘传感器的成像分析
DOI：
10.1109/tasc.2003.813978
复制
发表时间：
2003
影响因子：
1.8
通讯作者：
M. Nakazawa
中科院分区：
文献类型：
--
作者：
M. Ohkubo;H. Pressler;D. Fukuda;T. Inou;H. Takahashi;M. Nakazawa
用于量热计的超导转变边缘温度传感器（TES）工作在正常-超导转变的中间态。对X射线微束的响应的空间分布表明，正常超导相分离发生在铱TES与自反馈，已经观察到在许多载流导体与自加热。在500 /spl mu/m-平方TES中的电阻域（正常区域）随着施加的偏置电压的增加而增长。这一观察结果与自加热的一维模型相当吻合。另一方面，二维特征解释了超导域中的非均匀超导电流分布。这些发现对于开发具有大检测面积的能量色散X射线光谱检测器是重要的。
The superconducting-transition-edge temperature sensors (TES) for calorimeters operate in an intermediate state within normal-superconducting transition. The spatial profiles of a response to an x-ray microbeam exhibit that normal-superconducting phase separation occurs in an iridium TES with electrothermal feedback, as has been observed in many current-carrying conductors with self-heating. The resistive domain (normal region) in the 500 /spl mu/m-square TES grows as applied bias voltage increases. This observation agrees reasonably well with a one-dimensional model of the self-heating. On the other hand, two-dimensional features are explained by nonuniform supercurrent distribution in the superconducting domain. These findings are important for developing detectors with a large detection area for energy dispersive x-ray spectroscopy.