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Chin. Phys. B, 2023, Vol. 32(11): 118501    DOI: 10.1088/1674-1056/acd8ac
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

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

Ying-Yu Chen(陈滢宇)1,3,4, Chao-Qun Wang(王超群)1,3,4, Yuan-Xing Xu(徐元星)2, Yue Zhao(赵越)1,3,4, Li-Liang Ying(应利良)1,3,4, Hang-Xing Xie(谢颃星)2, Bo Gao(高波)1,3,4,†, and Zhen Wang(王镇)1,3,4
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
Abstract  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.
Keywords:  translation edge sensors      superconducting quantum interference device (SQUID)      self-feedback  
Received:  15 February 2023      Revised:  15 May 2023      Accepted manuscript online:  25 May 2023
PACS:  85.25.Dq (Superconducting quantum interference devices (SQUIDs))  
  85.25.Oj (Superconducting optical, X-ray, and γ-ray detectors (SIS, NIS, transition edge))  
Fund: Project supported by the Fund from China National Space Administration (CNSA) (Grant No. D050104) and 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.
Corresponding Authors:  Bo Gao     E-mail:  bo_f_gao@mail.sim.ac.cn

Cite this article: 

Ying-Yu Chen(陈滢宇), Chao-Qun Wang(王超群), Yuan-Xing Xu(徐元星), Yue Zhao(赵越), Li-Liang Ying(应利良), Hang-Xing Xie(谢颃星), Bo Gao(高波), and Zhen Wang(王镇) Increasing linear flux range of SQUID amplifier using self-feedback effect 2023 Chin. Phys. B 32 118501

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