Magnet coil system with active drift compensation for two independent current paths

A magnet coil system which is at least partially superconducting at a cryogenic temperature, the magnet system comprising:

• a first partial coil;
• at least one second partial coil which is connected in series with said first partial coil;
• a first superconducting switch bridging said first partial coil, said first partial coil and said first superconducting switch forming a first independent electric loop when said first superconducting switch is closed;
• a second superconducting switch bridging said second partial coil, said second partial coil and said second superconducting switch forming a second independent electric loop when said second superconducting switch is closed, wherein said first and said second electric loop have a common section;
• and
• a flux pump circuited in said common section, wherein a total sum of currents of said first and said second partial coils flows through said flux pump in an operating state.