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A Magnetic Refrigerator for Cooling at 2 K

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
56464
Program Year/Program:
2002 / SBIR
Agency Tracking Number:
012581
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Atlas Scientific
1367 Camino Robles Way San Jose, CA 95120-4925
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2002
Title: A Magnetic Refrigerator for Cooling at 2 K
Agency: NASA
Contract: NAS2-02105
Award Amount: $599,689.00
 

Abstract:

NASA requires cooling of detectors for space telescopes. Detector temperatures as low as 0.05 K are being specified for a number of missions. A number of physics experiments proposed on the International Space Station require very low temperatures as well. Thus, NASA has identified a dilution refrigerator (DR) as a new technology requirement for its Fundamental Physics program.For a DR to operate it requires pre-cooling at 2K. Other than stored He II an ADR is the only suitable technique for achieving 2K in space. The ADR can serve to pre-cool a DR or a low-temperature ADR stage to achieve very low temperatures. It can also be integrated into a He II storage dewar to eliminate boil-off. This will reduce size and increase lifetime of such a system making long-duration experiments feasible.An ADR is designed to provide cooling at 2K. Cycling the magnetic refrigerant it is necessary to connect or isolate the refrigerant to/from the heat source and the heat sink. This is accomplished by employing novel heat switches. The efficiency is greatly affected by the performances of the heat switches. In the design the on and off conductances and the switching times of the heat switches are optimized to achieve a high efficiency.

Principal Investigator:

Ali Kashani
Program Director
4085070906
akashani@atlasscientific.com

Business Contact:

Ali Kashani
Program Director
4085070906
akashani@atlasscientific.com
Small Business Information at Submission:

Atlas Scientific
1367 Camino Robles Way San Jose, CA 95120

EIN/Tax ID: 770281491
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No