Method of adjusting the homogeneity correctors of the magnetic field created by a magnet
US4812765A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1987 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | May 11, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3875
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for adjusting the homogeneity correctors of the magnetic field created by a magnet. In the invention an analytic expression of the field is calculated in the form of a breakdown into spherical harmonics. Similar breakdowns into spherical harmonics are also calculated but relative to the field created by each of the correction means available for correcting this field. Then an algebraic combination is made of the analytic expressions of the correction means so as to produce a correction analytic expression which, added to the analytic expression of the real field, transforms it into an analytic expression corresponding to an ideal magnetic field. Then the correction means are adjusted as a function of the parameters of the algebraic combination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.