METHODS AND APPARATUS FOR ORDERLY RUN-DOWN OF SUPERCONDUCTING MAGNETS

摘要

A method for maintaining operation of ancillary equipment associated with a superconducting magnet (10) carrying a DC current, comprising the steps of: directing the DC current through a DC to AC converter (40); ramping down the magnitude of the current flowing through the superconducting magnet at a controlled rate, thereby generating a controlled voltage across the controlled impedance; powering the ancillary equipment by the controlled voltage and an associated current; and controlling the ramping rate in order to maintain a required controlled voltage.