Magnetic failsafe valve for cryogen flow control

Abstract

Examples relate to cryogen flow control techniques using a magnetic failsafe valve. The valve is located between a cryogen source and a cryogen bath and has a position based on the magnetic field generated by a parallel solenoid circuit having a superconducting solenoid wound in a first direction and a non-superconducting solenoid (e.g., normal metal solenoid) wound in a second direction. When the current source is supplying a current to the parallel solenoid circuit and the temperature at the parallel solenoid circuit is below a threshold temperature, the current flows through the superconducting solenoid causing the magnetic field generated by the parallel solenoid circuit to position the magnetic valve in a particular state (e.g., open). The position of the valve can quickly change in situations where the temperature rises above the threshold temperature.

Dependencies are inferred from the claim text.