过渡边缘传感器X射线量热计吸收体耦合设计的影响
Impact of the absorber coupling design for Transition Edge Sensor X-ray Calorimeters
摘要：
过渡边缘传感器（TES）是未来星载X射线观测站（如Athena、Lynx和HUBS）的首选技术。这些任务需要同时操作数千个像素，并具有高能量分辨率。为了达到这些苛刻的要求，必须优化TES设计的各个方面。在这里，我们提出了不同的设备上的X射线吸收器和TES传感器之间的耦合是不同的测试的实验结果。特别是，我们看看耦合茎的直径和茎和TES双层之间的距离的影响。基于对交流复阻抗和噪声的测量，我们观察到随着吸收体杆和双层之间的间距减小，过量噪声减小。我们确定的起源，这种多余的噪音是内部的热波动之间的吸收杆和双层噪音。此外，我们看到的超导转变的外观扭结的耦合的影响。我们的观察表明，这些不必要的结构在过渡形状可以避免与耦合几何形状的仔细设计。此外，股骨柄直径似乎对TES过渡的平滑度有显著影响。这一观察结果仍然知之甚少，但对于AC和DC偏置的TES都非常重要。
英文摘要：
Transition Edge Sensors (TESs) are the selected technology for future spaceborne X-ray observatories, such as Athena, Lynx, and HUBS. These missions demand thousands of pixels to be operated simultaneously with high energy-resolving power. To reach these demanding requirements, every aspect of the TES design has to be optimized. Here we present the experimental results of tests on different devices where the coupling between the x-ray absorber and the TES sensor is varied. In particular, we look at the effects of the diameter of the coupling stems and the distance between the stems and the TES bilayer. Based on measurements of the AC complex impedance and noise, we observe a reduction in the excess noise as the spacing between the absorber stem and the bilayer is decreased. We identify the origin of this excess noise to be internal thermal fluctuation noise between the absorber stem and the bilayer. Additionally, we see an impact of the coupling on the superconducting transition in the appearance of kinks. Our observations show that these unwanted structures in the transition shape can be avoided with careful design of the coupling geometry. Also the stem diameter appears to have a significant impact on the smoothness of the TES transition. This observation is still poorly understood, but is of great importance for both AC and DC biased TESs.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
