Development of series SQUID array with on-chip filter for TES detector  

作　　者：Wentao Wu Zhirong Lin Zhi Ni Peizhan Li Tiantian Liang Guofeng Zhang Yongliang Wang Liliang Ying Wei Peng Wen Zhang Shengcai Shi Lixing You Zhen Wang 伍文涛;林志荣;倪志;李佩展;梁恬恬;张国峰;王永良;应利良;彭炜;张文;史生才;尤立星;王镇(State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology(SIMIT),Chinese Academy of Sciences(CAS),Shanghai 200050,China;CAS Center for Excellence in Superconducting Electronics(CENSE),Shanghai 200050,China;University of Chinese Academy of Sciences,Beijing 100049,China;Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology(SIMIT),Chinese Academy of Sciences(CAS),Shanghai 200050,China [2]CAS Center for Excellence in Superconducting Electronics(CENSE),Shanghai 200050,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China [5]University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Physics B》2022年第2期665-670,共6页中国物理B（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2017YFA0304003)。

摘　　要：A cold preamplifier based on superconducting quantum interference devices(SQUIDs)is currently the preferred readout technology for the low-noise transition edge sensor(TES).In this work,we have designed and fabricated a series SQUID array(SSA)amplifier for the TES detector readout circuit.In this SSA amplifier,each SQUID cell is composed of a first-order gradiometer formed using two equally large square washers,and an on-chip low pass filter(LPF)as a radiofrequency(RF)choke has been developed to reduce the Josephson oscillation interference between individual SQUID cells.In addition,a highly symmetric layout has been designed carefully to provide a fully consistent embedded electromagnetic environment and achieve coherent flux operation.The measured results show smooth V-Φcharacteristics and a swing voltage that increases linearly with increasing SQUID cell number N.A white flux noise level as low as 0.28μφ;/Hz;is achieved at 0.1 K,corresponding to a low current noise level of 7 pA/Hz;.We analyze the measured noise contribution at mK-scale temperatures and find that the dominant noise derives from a combination of the SSA intrinsic noise and the equivalent current noise of the room temperature electronics.

关 键 词：SSA amplifier TES detectors on-chip low pass filter(LPF) noise contribution 

分 类 号：TN722[电子电信—电路与系统] TN713.4