Patent ID: 11948736
Assignee: GE PRECISION HEALTHCARE LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 11:
12. A method for making a superconducting magnet system having two-stage quenching, the method comprising:
providing a primary coil assembly having a coil section configured to be superconducting when conducting current below a first critical current; and
providing an EMI shielding coil assembly having one or more coil sections configured to be superconducting when conducting current below a second critical current;
electrically coupling a variable resistor to the EMI shielding coil assembly, wherein the variable resistor is configured to be superconducting when conducting current below a third critical current and to be non-superconducting when conducting current at or above the third critical current, the third critical current being less than both the first critical current and the second critical current;
configuring the variable resistor such that generating a magnetic flux within the EMI shielding coil assembly causes the current conducted through the variable resistor to exceed the third critical current, quenching the variable resistor and generating heat; and
disposing the EMI shielding coil assembly such that the heat from the variable resistor quenches the primary coil assembly.