A magnet arrangement (M, M', M'', M''') for generating a magnetic field in the direction of a z-axis in a working volume (V) disposed on the z-axis about z=0, with a magnet coil system (A, A', A'', A''') which comprises one or more superconducting magnet partial coil systems (A1, A1', A1'', A1''', A2''', . . ., An'''), each forming superconductingly short-circuited current paths in the operating state, and with a further coil system (C, C', C'', C''') which can be charged or discharged independently of the magnet coil system (A, A', A'', A''') and comprises a first and a second partial coil system (C1, C2, C1' C2', C1'', C2'', C1''', C2'''), wherein the first partial coil system (C1, C1', C1'', C1''') and the second partial coil system (C2, C2', C2'', C2''') each comprise at least one coil, wherein all coils of the further coil system (C, C', C'', C''') are connected in series, wherein g.sub.C.sup.eff,diamag>0.1 mT/A, is characterized in that g.sub.C1.sup.eff,diamag>0.1 mT/A, g.sub.C2.sup.eff,diamag>0.1 mT/A,.times..times..times..times..times..times..times..times. ##EQU00001## wherein.di-elect cons. ##EQU00002## A substantially linear field change can thereby be realized in the working volume in dependence on a current change in the further coil system (C, C', C'', C''').