Increasing linear flux range of SQUID amplifier using self-feedback effect  

作　　者：陈滢宇 王超群 徐元星 赵越 应利良 谢颃星 高波 王镇 Ying-Yu Chen;Chao-Qun Wang;Yuan-Xing Xu;Yue Zhao;Li-Liang Ying;Hang-Xing Xie;Bo Gao;Zhen Wang(Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences(CAS),Shanghai 200050,China;Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;CAS Center for Excellence in Superconducting Electronics(CENSE),Shanghai 200050,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences(CAS),Shanghai 200050,China [2]Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [3]CAS Center for Excellence in Superconducting Electronics(CENSE),Shanghai 200050,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics B》2023年第11期623-626,共4页中国物理B（英文版）

基　　金：Project supported by the Fund from China National Space Administration (CNSA) (Grant No. D050104);the Fund for Low Energy Gamma Ray Detection Research Based on SQUID Technique;the Superconducting Electronics Facility (SELF) of Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences。

摘　　要：Superconducting quantum interference devices(SQUIDs) are low-noise amplifiers that are essential for the readouts of translation edge sensors(TESs). The linear flux range is an important parameter for SQUID amplifiers, especially those controlled by high-bandwidth digital flux-locked-loop circuits. A large linear flux range conduces to accurately measuring the input signal and also increasing the multiplexing factor in the time-division multiplexed(TDM) readout scheme of the TES array. In this work, we report that the linear flux range of an SQUID can be improved by using self-feedback effect. When the SQUID loop is designed to be asymmetric, a voltage-biased SQUID shows an asymmetric current–flux(I–Φ) response curve. The linear flux range is improved along the I–Φ curve with a shallow slope. The experimental results accord well with the numerical simulations. The asymmetric SQUID will be able to serve as a building block in the development of the TDM readout systems for large TES arrays.

关 键 词：translation edge sensors superconducting quantum interference device(SQUID) SELF-FEEDBACK 

分 类 号：TN722[电子电信—电路与系统]