Scanning susceptometer
US8040128B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Apr 14, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Apr 20, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to one embodiment, an apparatus comprises a magnet assembly to produce a static magnetic field and a set of high-Tc flux transformers to detect a flux change from an item when the item is subjected to the static magnetic field produced by the magnet assembly and to produce a current based on the flux change. Additionally, the apparatus comprises a set of magnetoresistive sensors to detect a field produced by a current produced in the set of high-Tc flux transformers and a scanning mechanism to produce cyclic relative motion between the apparatus and the item. Furthermore, the apparatus comprises a magnetic shield to shield the magnetoresistive sensors, where the shield is an open ended cylinder made from mu-metal, where mu-metal is a very high magnetic permeability iron-nickel alloy. The apparatus additionally comprises a water interface mechanism to fill a gap between the apparatus and the item with water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.