Switch assemblies of superconducting magnet assemblies and reconfigurable superconducting magnet assemblies of a cryogenic system

A superconducting magnet assembly, comprising:

• a magnet configured to generate a polarizing magnetic field;
• a thermosyphon tube in thermal contact with the magnet by being in direct contact with the magnet or via material of a relatively high thermal conductivity being in direct contact with the magnet, the thermosyphon tube configured to carry cryogen therethrough and cool the magnet via the cryogen;
• a main tank;
• and
• a metering tank containing the cryogen and coupled with the main tank, the main tank having an interior volume greater than an interior volume of the metering tank,
• wherein the thermosyphon tube is coupled with the main tank at a first end of the thermosyphon tube and coupled with the metering tank at a second end of the thermosyphon tube, the second end opposite the first end, and the thermosyphon tube and the metering tank define a path along which the cryogen flows.