Patent ID: 8294543
Filing Date: 2012-10-23
Classification: G01R,H01F

Abstract:
1. A method of producing a magnetic field having a controllable magnitude within a confined field space having a longitudinal axis, said method comprising: supplying a first magnetostatic potential to a first longitudinal pole face at a first longitudinal boundary oriented substantially normal to the longitudinal axis; supplying a second magnetostatic potential to a second longitudinal pole face at a second longitudinal boundary oriented substantially normal to the longitudinal axis; providing a plurality of lateral pole faces disposed along a lateral boundary intermediate the first and second longitudinal boundaries; each respective one of the plurality of lateral pole faces disposed in a respective lateral boundary plane oriented substantially normal to the longitudinal axis; supplying a respective magnetostatic potential to each respective one of the plurality of lateral pole faces; and for each respective one of the plurality of lateral pole faces, selecting a value of the respective magnetostatic potential in accordance with a position of the respective lateral boundary plane relative to the first and second longitudinal boundaries.