The readout system with a high multiplexing ratio has become a bottleneck limiting the application of large-scale Transition Edge Sensor (TES) detector arrays. In recent years, the microwave superconducting quantum interference device (SQUID) multiplexer has emerged as a key technology for effectively reading large-scale cryogenic detector arrays. Currently, the microwave SQUID multiplexer is being adopted by an increasing number of experiments due to its capability of achieving a multiplexing ratio of 2000:1 within the readout bandwidth. In this study, we developed and fabricated a 32-channel microwave SQUID multiplexer prototype. And we measured 8 channels of the prototype. The measured equivalent noise current of the prototype reached 154 pA/Hz.
@article{arxiv.2603.29613,
title = {Design, Fabrication and Characterization of Microwave Multiplexing SQUID Prototype},
author = {Mengjie Song and Yixian Deng and Zhengwei Li and He Gao and Zhouhui Liu and Yudong Gu and XiangXiang Ren and Nan Li and Guofu Liao and Qinglei Xiu and Yu Xu and Mengqi Jiang and Xufang Li and Yaqiong Li and Shibo Shu and Yongjie Zhang and Congzhan Liu},
journal= {arXiv preprint arXiv:2603.29613},
year = {2026}
}