Integrated Electrical Properties of the Frequency Multiplexed Cryogenic Readout System for Polarbear/Simons Array
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY(2021)
摘要
POLARBEAR/Simons Array is a cosmic microwave background (CMB) polarization experiment, with science goals including a deep search for CMB B-mode polarization created by inflationary gravitational waves, and characterization of the CMB B-mode signal from gravitational lensing. When completed, Simons Array will have over 20,000 superconducting transition-edge sensor bolometers, cooled to 300 mK with closed-cycle cryogenics. This significant increase in detectors and sensitivity is enabled by advancements in frequency multiplexed readout. The detectors are read out with DfMux digital frequency-domain multiplexing, with 40 channels read out by each SQUID array, with frequency channels between 1 and 5 MHz defined by an inductor and capacitor in series with each detector. After the system was completed and characterized for POLARBEAR-2a, modifications were made that further improved performance for POLARBEAR-2b. We present the characterization of the integrated cryogenic readout system for POLARBEAR-2a and POLARBEAR-2b, and comparison of properties including stray impedance and frequency scatter.
更多查看译文
关键词
Superconducting resonators, microwave devices, and components, superconducting electronics, multiplexing, instrumentation and readout of superconducting devices, superconducting detectors, millimeter, wave detectors, general detector topics, superconducting detectors, imaging arrays of detectors, satellites and large arrays, superconducting detectors
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要