Implications of Weak Link Effects on Thermal Characteristics of Transition-Edge Sensors
Implications of Weak Link Effects on Thermal Characteristics of Transition-Edge Sensors
复制标题
弱连接效应对过渡边缘传感器热特性的影响
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
S. Smith
中科院分区：
文献类型：
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作者：
C. Bailey;J. Adams;S. Bandler;R. Brekosky;J. Chervenak;M. Eckart;F. Finkbeiner;R. Kelley;D. Kelly;C. Kilbourne;F. Porter;J. Sadleir;S. Smith
过渡边缘传感器（TES）微量热计中的弱连接行为需要通过其过渡更仔细地表征器件的热特性。这对于偏置电流的小变化导致有效转变温度的大变化的小型TES尤其如此。为了正确解释测量结果，特别是复阻抗，必须知道过渡过程中每个点的温度相关热导率G（T）和热容C（T）。我们提出的数据说明这些影响，并讨论我们如何克服的挑战，准确地确定G和T的I-V曲线。我们还展示了这些弱链接效应如何随TES大小而变化。此外，我们使用对G（T）的这种改进的理解来确定，对于这些TES微量热计，Kaptiza边界电阻主导具有吸收体的器件的G，而当确定不具有吸收体的器件的G时，还需要考虑电子-声子耦合
Weak link behavior in transition-edge sensor (TES) microcalorimeters creates the need for a more careful characterization of a device’s thermal characteristics through its transition. This is particularly true for small TESs where a small change in the bias current results in large changes in effective transition temperature. To correctly interpret measurements, especially complex impedance, it is crucial to know the temperature-dependent thermal conductance, G(T), and heat capacity, C(T), at each point through the transition. We present data illustrating these effects and discuss how we overcome the challenges that are present in accurately determining G and T from I–V curves. We also show how these weak link effects vary with TES size. Additionally, we use this improved understanding of G(T) to determine that, for these TES microcalorimeters, Kaptiza boundary resistance dominates the G of devices with absorbers while the electron-phonon coupling also needs to be considered when determining G for devices without absorbers