[20a-C207-1~7] 11.4 Analog applications and their related technologies

[20a-C207-3] Investigation of a gradiometric HTS-SQUID for highly balanced gradiometer

〇Akira Tsukamoto¹, Seiji Adachi¹, Tsunehiro Hato¹, Yasuo Oshikubo¹, Keiichi Tanabe¹ (1.SUSTERA)

Keywords:HTS-SQUID, Gradiometer, Imbalance

In order to apply HTS-SQUID to a sensing system moving in the Earth field, a highly-balanced gradiometer which detects only magnetic gradient field seems necessary. Since a simple SQUID inductor used in a conventional directly-coupled HTS-SQUID gradiometer has relatively large field sensitivity, it is difficult to obtain a gradiometer with imbalance of 1/10000. In this study, we have investigated a gradiometric SQUID inductor to suppress field sensitivity and obtained a prospect to achieve the imbalance below 1/10000.