用于横载量应用优化的微波鱿鱼多路复用器

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用于横载量应用优化的微波鱿鱼多路复用器

A Microwave SQUID Multiplexer Optimized for Bolometric Applications

论文作者

Dober, B., Ahmed, Z., Arnold, K., Becker, D. T., Bennett, D. A., Connors, J. A., Cukierman, A., D'Ewart, J. M., Duff, S. M., Dusatko, J. E., Frisch, J. C., Gard, J. D., Henderson, S. W., Herbst, R., Hilton, G. C., Hubmayr, J., Li, Y., Mates, J. A. B., McCarrick, H., Reintsema, C. D, Silva-Feaver, M., Ruckman, L., Ullom, J. N., Vale, L. R., Van Winkle, D. D., Vasquez, J., Wang, Y., Young, E., Yu, C., Zheng, K.

论文摘要

微波鱿鱼多路复用器（$μ$ MUX）已被优化，用于与大型超导过渡边缘传感器（TES）凸电计耦合。我们在4-8 GHz RF频段的1820通道多路复用器配置中介绍了可扩展的低温多路复用器芯片设计。产量，灵敏度和串扰的关键指标是通过455个读出通道的测量来确定的，该通道跨度为4-5 GHz。中间白噪声级别为45 pa/$ \ sqrt {\ textrm {hz}} $，以2 Hz进行评估，共同模式减法后，用1/f膝盖$ \ leq $ 20 MHz。白色噪声水平降低了优化的TES BOLOMET的灵敏度，以检测150 GHz的宇宙微波背景，仅降低了3％。任何频道对之间测量的串扰均为$ \ leq $ 0.3％。

A microwave SQUID multiplexer ($μ$MUX) has been optimized for coupling to large arrays of superconducting transition-edge sensor (TES) bolometers. We present the scalable cryogenic multiplexer chip design in a 1820-channel multiplexer configuration for the 4-8 GHz rf band. The key metrics of yield, sensitivity, and crosstalk are determined through measurements of 455 readout channels, which span 4-5 GHz. The median white-noise level is 45 pA/$\sqrt{\textrm{Hz}}$, evaluated at 2 Hz, with a 1/f knee $\leq$ 20 mHz after common-mode subtraction. The white-noise level decreases the sensitivity of a TES bolometer optimized for detection of the cosmic microwave background at 150 GHz by only 3%. The measured crosstalk between any channel pair is $\leq$ 0.3%.

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