论文标题
AC偏向超导的过渡边缘传感器的电压波动
Voltage Fluctuations in ac Biased Superconducting Transition-Edge Sensors
论文作者
论文摘要
我们对超导过渡传感器（TESS）中的基本噪声源进行了详细分析，在MHz频率下偏置的交流电压并被视为超导弱环节。我们已经研究了电阻过渡中的噪声，这是几个具有不同正常电阻和几何形状不同的探测器的浴温温度的函数。我们表明，通常在TES电带宽中观察到的多余噪声可以通过在弱环内产生的准粒子的平衡来解释。约瑟夫森频率和较高谐波的波动通过弱连接的非线性响应与正弦电流相关的非线性响应在检测器带宽处的测得的电压噪声显着贡献。
We present a detailed analysis of the fundamental noise sources in superconducting transition-edge sensors (TESs), ac voltage biased at MHz frequencies and treated as superconducting weak links. We have studied the noise in the resistive transition as a function of bath temperature of several detectors with different normal resistances and geometries. We show that the excess noise, typically observed in the TES electrical bandwidth, can be explained by the equilibrium Johnson noise of the quasiparticles generated within the weak link. The fluctuations at the Josephson frequency and higher harmonics contribute significantly to the measured voltage noise at the detector bandwidth through the nonlinear response of the weak link with a sinusoidal current-phase relation.
