21-25 July 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

C3Or1A-05 [Invited]: Numerical modeling of a sub-Kelvin Active Magnetic Regenerative Refrigeration Cycle

Jul 24, 2019, 12:00 PM
Level 6, Room 22-23

Level 6, Room 22-23

Invited Oral Presentation C3Or1A - Superfluid Helium


Chloe Gunderson (University of Wisconsin-Madison)


Continuous and efficient sub-Kelvin cooling for uninterrupted operation of cutting edge detectors, both in space and on the ground, is critical for top performance in many NASA missions. The development of a sub-Kelvin Active Magnetic Regenerative Refrigerator (AMRR) will provide distributed and continuous sub-K cooling to space instrumentation via circulation of a 3He-4He mixture. This system will provide substantial advantages over state of the art coolers including reduced mass while maintaining reliable uninterrupted cooling for cryogenic instruments. A key component of the sub-Kelvin AMRR, the Superfluid Magnetic Pump (SMP), has already been developed and tested. To ensure the successful construction of a functional AMRR, a numerical model was developed for use as a design tool to size the regenerators to match the existing SMP. This presentation will highlight the results of parametric studies using the aforementioned model.

Primary author

Chloe Gunderson (University of Wisconsin-Madison)


Prof. Gregory Nellis (University of Wisconsin-Madison) Franklin Miller (University of Wisconsin - Madison)

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