American Magnetics, Inc.
AMI manufactures superconducting magnet systems and cryogenic level instrumentation, and power supplies for charging the magnets.
Lake Shore Cryotronics.
Superconducting magnet charging power supplies.
Magnavolt
Magnet power supplies, linear controlled from +/-6.5V to +/-350V, +/-0.1A to +/-120A. Fast programmable, constant current, continuous zero crossing, 4-quadrant operation.