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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Masti, M. Lehtonen, J. Mikkonen, R. Rostila, L. |
| Copyright Year | 2002 |
| Abstract | The Hall sensor magnetometer is a widely used tool to characterize the homogeneity of high temperature superconducting tapes. However, it is well known that the current density distribution inside the sample, J, cannot be uniquely solved from the measured magnetic flux density, B. By discretising the Biot-Savart law the problem can be reduced to a solvable set of linear equations. Inaccurate assumptions about the sample geometry, noise in the measured data, and numerical errors can cause considerable error in the computed J. In this paper, a statistical approach to compare different inversion methods is presented. Example runs are carried out in order to find optimal locations for the measurement points. The results show that the relative error can be reduced by several orders of magnitude with the proper choice of measurement points, but the problem always remains ill-conditioned. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 3671 |
| Ending Page | 3674 |
| Page Count | 4 |
| File Size | 543322 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 13 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Numerical analysis Magnetic sensors Magnetometers Biosensors Sensor phenomena and characterization Temperature sensors Superconducting films Current density Density measurement Current measurement |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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