Robot-Based NDE System Using 3D-Mobile HTS-SQUID

Author

Hatsukade, Yoshimi ; Yotsugi, Kohe ; Kanai, Sho ; Hayashi, Keita ; Wakana, Hironori ; Tarutani, Yoshinobu ; Tanabe, Keiichi ; Tanaka, Saburo

Author_Institution

Toyohashi Univ. of Technol., Toyohashi, Japan

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

796

Lastpage

800

Abstract

A novel HTS-SQUID gradiometer with ramp-edge Josephson junctions (JJs) composed of SmBa₂Cu₃O_y base-electrode and La₀₁Er_0.95Ba_1.95Cu₃O_y counter-electrode was developed. The robustness of the gradiometer in AC field perpendicular to the device plane was investigated. In an AC field of less than 2.8 mT_pp at 100 Hz, flux-trapping, jumping and increase in noise did not happen in the gradiometer, while a traditional HTS-SQUID gradiometer with YBa₂Cu₃O_7-x thin film and bicrystal JJs with the same dimension as the novel gradiometer could not be operated properly in an AC field of about several tens nT_pp. A robot-based NDE system utilizing the novel HTS-SQUID gradiometer was developed. The system could move the gradiometer three-dimensionally (3D) in an unshielded environment without magnetic shielding or compensation technique. Eddy-current-based detection of a through hole in magnetized stainless steel board was demonstrated by the robot-based HTS-SQUID NDE system.

Keywords

SQUID magnetometers; barium compounds; flux pinning; high-temperature superconductors; samarium compounds; 3D-mobile HTS-SQUID; HTS-SQUID gradiometer; La_0.1Er_0.95Ba_1.95Cu₃O_y; SmBa₂Cu₃O_y; eddy-current-based detection; flux-trapping; magnetized stainless steel board; ramp-edge Josephson junctions; robot-based NDE system; HTS-SQUID; ramp-edge Josephson junctions; robot-based NDE system; unshielded environment;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2019539

Filename

5153089