MAGNETIC FIELD GENERATING ASSEMBLY AND METHOD

摘要

A magnetic field generating assembly comprises a magnetic field generation system (7,8) for generating, in a first mode, a first, relatively strong static magnetic field in a working volume (71) located outside the assembly, and for generating, in a second mode, a second, static magnetic field in the working volume in a second mode. In the second mode the magnetic field in the working volume (71) is weaker but more uniform than the first relatively strong magnetic field.