A magnet arrangement comprising a superconducting magnet coil system (M)
which has an ohmic resistance (R) of zero or more during operation, and a
flux pump (P) which comprises at least one superconducting switch and at
least two superconducting secondary coils (M1, M2), is characterized in
that at least one superconducting current path is provided, wherein the
superconducting magnet coil system (M) or parts thereof is/are connected
in series with at least two secondary coils (M1, M2), and wherein at
least one secondary coil (M2) can be superconductingly bridged through
closing of a superconducting switch (S1), and at least two primary coils
(C1, C2) are provided which can each be fed independently of each other
with a current (I1, I2) and which are each inductively coupled with at
least one of the secondary coils (M1, M2). The flux pump is suitable for
the stabilization of the magnetic field of the magnet coil system (M)
during long-term operation.
