Frequency domain multiplexing for bolometer arrays
Frequency domain multiplexing for bolometer arrays
复制标题
测辐射热计阵列的频域复用
DOI：
10.1016/j.nima.2003.11.311
复制
发表时间：
2004
影响因子：
1.4
通讯作者：
H. Spieler
中科院分区：
文献类型：
--
作者：
T. Lanting;Hsiao;J. Clarke;M. Dobbs;Adrian T. Lee;M. Lueker;P. Richards;Augustus Smith;H. Spieler
制造一千个或更多个传感器的阵列正在变得实用。然而，读出这些阵列仍然是一个重大的仪器挑战。我们使用来自超导过渡边缘传感器(TES)阵列的信号的频域多路传输来解决这一挑战。每个TES传感器与LC调谐电路串联，并在选定频率(380 kHz到1 MHz)处用交流电偏置。每个传感器的信号对其各自的偏置电流进行幅度调制。LC滤波器减少了来自其余传感器的约翰逊噪声的带宽。这些信号在电流求和节点组合，并使用单个超导量子干涉装置(SQUID)阵列(100个元件)进行测量。我们研制了一种定制的SQUID控制器，在1 MHz频率下，测量的转换率为107Φ0/S。我们设计并制作了光刻LC滤光片。有了这些过滤器，我们已经演示了与两个TES传感器的多路复用，并准备将规模扩大到32个传感器。
Fabrication of arrays of a thousand or more sensors is becoming practical. However, readout of these arrays remains a major instrumental challenge. We address this challenge using frequency-domain multiplexing of signals from an array of superconducting transition-edge sensors (TES). Each TES sensor is connected in series with an LC tuned circuit and biased with an alternating current at a selected frequency, ranging from 380kHz to 1MHz.The signal from each sensor amplitude-modulates its respective bias current. The LC filter reduces the bandwidth of the Johnson noise from the remaining sensors. The signals are combined at a current summing node and measured with a single superconducting quantum interference device (SQUID) array (100 elements). We have developed a custom SQUID controller with a measured slew rate of 107Φ0/s at 1MHz. We designed and fabricated photolithographed LC filters. With these filters we have demonstrated multiplexing with two TES sensors and are preparing to scale up to 32 sensors.