Development of series SQUID array with on-chip filter for TES detector |
| |
| Authors: | 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 |
| |
| Affiliation: | 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 |
| |
| Abstract: | 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 radio-frequency (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-Φ characteristics and a swing voltage that increases linearly with increasing SQUID cell number N. A white flux noise level as low as 0.28 μΦ0/Hz1/2 is achieved at 0.1 K, corresponding to a low current noise level of 7 pA/Hz1/2. 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. |
| |
| Keywords: | SSA amplifier TES detectors on-chip low pass filter (LPF) noise contribution |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|
