Development of a multi-stage magnetic cooling system at NASA's Goddard Space Flight Center
Abstract: I will discuss the development of a multi-stage magnetic cooling system at NASA's Goddard Space Flight Center. The device, based on adiabatic demagnetization refrigerators (ADRs), is designed to continuously cool detectors at 0.05 K and optics at 4 K with high thermodynamic efficiency. We made significant progress in developing the system, including the production and testing of a single-stage 10-K-to-4-K ADR, the assembly of a two-stage 10-K-to-4-K CADR, and the fabrication and assembly of a four-stage 4-K-to-0.05-K CADR. Despite challenges, including a lack of access to key personnel and lab resources due to sudden emergence of flight work early in the development and later due to COVID-19, we are now successfully testing the system and optimizing its performance. This technology is currently baselined in four different instruments for future spaceflight missions.
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- Date: 28 Apr 2023
- Time: 12:00 PM to 01:00 PM
- All times are (UTC-04:00) Eastern Time (US & Canada)
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- 401 W Main Street, Mechanical and Nuclear Engineer
- Richmond, Virginia
- United States 23284
- Building: East Engineering Building
- Room Number: E3229
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- Co-sponsored by Virginia Commonwealth University, Department of Mechanical and Nuclear Engineering
Speakers
Amir of NASA Goddard Space Flight Center
Development of a multi-stage magnetic cooling system at NASA's Goddard Space Flight Center
Abstract: I will discuss the development of a multi-stage magnetic cooling system at NASA's Goddard Space Flight Center. The device, based on adiabatic demagnetization refrigerators (ADRs), is designed to continuously cool detectors at 0.05 K and optics at 4 K with high thermodynamic efficiency. We made significant progress in developing the system, including the production and testing of a single-stage 10-K-to-4-K ADR, the assembly of a two-stage 10-K-to-4-K CADR, and the fabrication and assembly of a four-stage 4-K-to-0.05-K CADR. Despite challenges, including a lack of access to key personnel and lab resources due to sudden emergence of flight work early in the development and later due to COVID-19, we are now successfully testing the system and optimizing its performance. This technology is currently baselined in four different instruments for future spaceflight missions.
Biography:
Dr. Amir Jahromi is a Senior member of the Cryogenics and Fluids Branch at NASA Goddard Space Flight Center, where he has worked on various projects, including the commissioning of the MIRI cooler for the James Webb Space Telescope (JWST), L’Ralph aboard Lucy, GSE-related support to the Hitomi and XRISM missions, and the development of future spaceflight Adiabatic Demanganization Refrigerator (ADR). He has also conducted thermophysical properties measurements in support of the JWST and VIIRS-JPSS.
Dr. Jahromi has been a Co-investigator on the 6-stage CADR system that provides cooling at 50 mK and reject heat to a 10 K heat sink, and is currently the PI on a 3-year effort to develop the next generation spaceflight Continuous ADR.
Before joining NASA Goddard, he developed and successfully demonstrated a proof-of-concept, novel Superfluid Magnetic Pump (SMP) using mixtures of condensed 3He-4He. His dissertation work involved complete end-to-end modeling and architecture design of a novel sub-Kelvin Active Magnetic Regenerative Refrigeration (AMRR) system using the demonstrated SMP with 3He-4He mixtures. During his master’s work, he developed a first-of-its-kind dry Joule-Thomson 1 K facility that would use helium gas at room temperature and with the aid of a 4 K PT cryocooler.
Address:Cryogenics and Fluids Branch, NASA Goddard Space Flight Center , Washington D.C., United States