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Hybrid Cooler System for Superconducting Electronics

Award Information

Department of Defense
Missile Defense Agency
Award ID:
Program Year/Program:
2004 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
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 1
Fiscal Year: 2004
Title: Hybrid Cooler System for Superconducting Electronics
Agency / Branch: DOD / MDA
Contract: FA9453-04-C-0285
Award Amount: $0.00


Atlas Scientific, in conjunction with the University of Wisconsin Cryogenic Engineering Group, is developing an innovative 10 K cooling system that is ideally suited to the cryogenic packaging requirements of a space-based superconducting electronics system. To achieve the most efficient and reliable hybrid cooler possible, we are combining a single-stage, linear-drive pulse tube with a low-temperature reverse-Brayton stage. The system avoids the inherent losses associated with a regenerator at low temperature, as well as, the inefficiencies associated with the Joule-Thompson process, by incorporating a novel turbo-expander in the low temperature reverse-Brayton stage. We are currently developing hydrostatic bearings for use in the turbine. Hydrostatic bearings provide support even in the absence of shaft rotation and therefore eliminate rubbing contact and increase the life and reliability of the bearing. Also, because hydrostatic bearings do not directly depend on viscous action for operation, relatively larger clearances can be used without significantly sacrificing rotordynamic performance at low temperatures, thus making them cost effective. In Phase II we will design and fabricate the complete miniature cryogenic turbine, using hydrostatic bearings, for inclusion in the hybrid cooler.

Principal Investigator:

James Maddocks
Senior Research Scientist

Business Contact:

Ali Kashani
Program Director
Small Business Information at Submission:

1367 Camino Robles Way San Jose, CA 95120

EIN/Tax ID: 770281491
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
University of Wiscosin-Madison
460 Peterson Bldg. , 750 University Ave.
Madison, WI 53706
Contact: Diane Barrett
Contact Phone: (608) 262-0252
RI Type: Nonprofit college or university