Fast NDE of Superconducting Magnet Wires Using a Flow-Through SQUID Microscope

Author

Matthews, J. ; Wellstood, F.C. ; Weinstock, H.

Author_Institution

Univ. of Maryland, College Park

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

776

Lastpage

779

Abstract

We have developed a cryocooled high-Tc SQUID microscope for fast non-destructive evaluation (NDE) of superconducting NbTi magnet wire. A feedthrough mechanism pulls the wire at speeds of up to 20 cm/s through a thin mylar tube that separates the room temperature wire from the SQUID. We present results on test wires where we detect defects down to about 0.3 mm diameter. Using analytical and numerical models, we extract information from the data, such as defect size and location. We describe a method for fast automated detection of defects in long wires.

Keywords

SQUIDs; flaw detection; microscopes; superconducting cables; superconducting magnets; cryocooled high-Tc flow-through SQUID microscope; defect location; defect size; fast nondestructive evaluation; feedthrough mechanism; room temperature wire; size 0.3 mm; superconducting magnet wire; superconducting quantum interference devices; velocity 20 cm/s; Information analysis; Magnetic force microscopy; Magnetic separation; Niobium compounds; SQUIDs; Superconducting filaments and wires; Superconducting magnets; Temperature; Testing; Titanium compounds; MRI; NDE; SQUID; superconducting wire;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.898267

Filename

4277598