Development of A dc-SQUID Amplifier with Intra-coil Resistors-Reference-Cited by-同舟云学术

Development of A dc-SQUID Amplifier with Intra-coil Resistors

Published:2023-09-01 Issue: Volume: Page:
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Author:

Wu Wentao¹,Lin Zhirong¹,Ni Zhi¹,Zhang Shuo²,Zhang Guofeng¹,Wang Yongliang¹,Ying Liliang¹,Peng Wei¹,You Lixing¹,Wang Zhen¹

Affiliation:

1. National Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences

2. ShanghaiTech University

Abstract

Abstract We have developed a dc-SQUID amplifiers with intra-coil resistors based on second-order parallel gradiometers. The measured results show that intra-coil resistors can significantly increase the flux-voltage transfer coefficient VΦ as well as smooth out resonances and produce a smooth flux-voltage (V-Φ) characteristic curve. It has been observed through a comparison of various intra-coil damping resistors that the flux-voltage transfer coefficient VΦ as a function of the intra-coil resistors rises as the corresponding electric conductance increase. The measured results of the flux noise at 4.2 K demonstrate explicitly that the flux-voltage transfer coefficient can greatly increase detection sensitivity and successfully reduce the noise contribution from the electronics operating at room temperature.

Publisher

Research Square Platform LLC

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