American Magnetics AMI Superconducting Magnets - Manual (Page 3)

2
Introduction
Persistent Mode
After it has been energized, a superconducting magnet can be operated in the
persistent mode by short circuiting the magnet with a superconductor. This is
accomplished by connecting a section of superconducting wire contained in the
persistent switch across the terminals of the magnet. This section of superconductor
can be heated to drive it into the resistive state so a voltage can be established across
the terminals and the magnet can be charged or discharged. After reaching the desired
field, the heater is turned off and the magnet is shorted by the switch.
Maintenance
AMI magnets are designed and constructed so as to provide years of useful service
and require no maintenance if installed and operated in accordance with these
instructions.