Physics & Astronomy Faculty and Staff Publications
The CMB-S4 next-generation ground-based cosmic microwave background experimental program aims to provide definitive measurements of the early universe using telescopes with ∼500,000 detectors. In this report, we describe the initial results of a project to develop low-noise Series SQUID Array Amplifiers (SSAAs) that are suitable for Frequency Domain Multiplexed (FDM) readout for large CMB instruments. The new series SQUID array amplifier designs exhibit excellent performance characteristics – smooth output characteristics that simplify tuning and operation, high transimpedance (400 V/A), low current noise referred to the input (5.9 pA/Hz½), low input inductance (11 nH), and low power dissipation (18 nW) that for the first time will enable these devices to be co-located on the focal plane of CMB experiments, thereby reducing unwanted parasitics from cabling.
The 17th International Workshop on Low-Temperature Detectors
Boyd, S. T. P., Groh, J. C., Hall, J. A., Suzuki, A., & Cantor, R. (2017). Series SQUID Array Amplifiers Optimized for MHz Frequency-Domain Multiplexed Detector Readout. University of New Mexico. https://doi.org/10.25827/QTSC-KR91