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Flux transformer with low-pass-filtering characteristics for superconducting gravity instruments
Superconductor Science and Technology ( IF 3.6 ) Pub Date : 2020-07-12 , DOI: 10.1088/1361-6668/ab9e42
Daiyong Chen , Guangshun Jia , Xikai Liu , Liang Chen , Xiangdong Liu

Superconducting quantum interference devices (SQUIDs) are a key component of new superconducting gravity instruments (SGIs). They have a higher displacement detection resolution than traditional methods. However, owing to the finite system slew rate, flux jump occurs when SQUIDs are disturbed by high-frequency electromagnetic signals, which makes the SGI incapable of long-term measurement and creates difficulties for data processing. In this study, a superconducting flux transformer with low-pass-filtering characteristics was designed with the aim of decreasing the probability of flux jump. The transformers utilize the eddy-current loss of high-conductivity metal to filter high-frequency interference from the signals that enter the SQUID. Superconducting flux transformers have been designed and tested. The results were consistent with the theoretical simulation, and the stability of the SQUID could be improved.

中文翻译:

具有低通滤波特性的磁通变压器,用于超导重力仪器

超导量子干涉装置(SQUID)是新型超导重力仪器(SGI)的关键组成部分。与传统方法相比,它们具有更高的位移检测分辨率。但是,由于系统的摆率有限,当SQUID受到高频电磁信号的干扰时,会发生磁通跳跃,这使得SGI无法进行长期测量,并且给数据处理带来了困难。在这项研究中,设计了一种具有低通滤波特性的超导磁通变压器,旨在降低磁通跳跃的可能性。变压器利用高电导率金属的涡流损耗从进入SQUID的信号中滤除高频干扰。超导通量变压器已经过设计和测试。
更新日期:2020-07-13
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