Development of a Flow-Through SQUID System for Non-Destructive Evaluation of MRI Wire
Abstract
This project developed techniques to detect small defects in NbTi magnet wire at room-temperature using a flow-through high-transition temperature (Tc) superconducting quantum interference device (SQUID) system. The ability to detect small defects in km-long sections of NbTi magnet wire could improve the production yield of high-field magnets for power and medical applications. Such magnets are wound from continuous sections of wire up to 1 km long, and a single small defect in the wire can limit the field the magnet produces, making it unsuitable. It is highly desirable to be able to locate defects in wire using non-destructive evaluation (NDE) of the wire before the magnet is wound. Ideally, the NDE system must be able to detect small buried defects due to yields (wire stretched beyond elastic limit) and occlusions (non-conducting impurity grain introduced into the wire). Such defects have proven to be difficult to find using visual inspection or conventional eddy current detection, and better techniques are needed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 23, 2007
- Accession Number
- ADA465649
Entities
People
- F. C. Wellstood
Organizations
- University of Maryland