Hybrid Cooler System for Superconducting Electronics

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$0.00
Award Year:
2004
Program:
STTR
Phase:
Phase I
Contract:
FA9453-04-C-0285
Award Id:
69429
Agency Tracking Number:
B2-0805
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1367 Camino Robles Way, San Jose, CA, 95120
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
938515913
Principal Investigator:
JamesMaddocks
Senior Research Scientist
(608) 265-4246
maddocks@cae.wisc.edu
Business Contact:
AliKashani
Program Director
(408) 507-0906
akashani@atlasscientific.com
Research Institute:
University of Wiscosin-Madison
Diane Barrett
460 Peterson Bldg. , 750 University Ave.
Madison, WI, 53706
(608) 262-0252
Nonprofit college or university
Abstract
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.

* information listed above is at the time of submission.

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