Development of a Flow-Through SQUID System for Non-Destructive Evaluation of MRI Wire
Final rept. 1 Oct 2004-30 Jul 2006
MARYLAND UNIV COLLEGE PARK DEPT OF PHYSICS
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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.
- Test Facilities, Equipment and Methods
- Electricity and Magnetism
- Quantum Theory and Relativity