Non-Destructive Testing of YBCO Coated-Conductor by Multi-Channel HTS SQUID Gradiometers

Author

Hato, Tsunehiro ; Adachi, Seiji ; Wakana, Hironori ; Hata, Kiyoshi ; Tarutani, Yoshinobu ; Machi, Takato ; Tanabe, Keiichi

Author_Institution

Supercond. Res. Lab., ISTEC, Tokyo, Japan

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

804

Lastpage

807

Abstract

We developed a non-destructive testing (NDT) system utilizing multi-channel high-temperature superconductor (HTS) SQUID gradiometers in order to examine rare earth (RE)-123 coated conductors striated into multi-filamentary lines. The 5-channel HTS SQUID gradiometer array was composed of ramp-edge junctions with LaErBaCuO and SmBaCuO electrode layers, and fabricated by using an HTS multilayer fabrication technique. The parallel gradiometers detected the vertical element of magnetic field gradient induced around defects by an eddy current. It was demonstrated that we can detect macroscopic defects in each filamentary superconducting line at high speed up to 30 m/h.

Keywords

SQUID magnetometers; barium compounds; eddy current testing; erbium compounds; high-temperature superconductors; lanthanum compounds; samarium compounds; LaErBaCuO; SmBaCuO; YBCO Coated-Conductor; eddy current; filamentary superconducting line; magnetic field gradient; multi-channel HTS SQUID gradiometers; non-destructive testing; Coated conductor; NDE; NDT; SQUID; filament; gradiometer; high-temperature superconductor; non-destructive testing; ramp-edge junction; striation;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2019025

Filename

5153056