NASA SBIR 01-1 Solicitation


PROPOSAL NUMBER: S2.04-9726 (For NASA Use Only - Chron: 012273 )

Self-operating, low-vibration 80K - 150K J-T miniature cryo-cooler for long
term space applications is proposed. This J-T cryo-cooler leverages
significant research of low-temperature phase transformation in metallic
alloys with Shape Memory. There are three group SMA's are proposed for
miniature J-T cryo-cooler: (A) - Cu - based and/or Mn-based Shape Memory
Alloys (SMAs) adapted to 80K - 150K valve open/close operations (Mn-based
alloys even to lower 30K - when neon gas is applied). (B) - high-corrosion
resistance Ce-based alloys which exhibit phase transformation with volume
change DV/V over 10% is recommended for valve open/close operation when
low-purity or mixture gases are used. (C)- high-damping porous TiNi SM with
super-elasticity is proposed to provide vibration suppression in broad range
wave band frequencies (from 20Hz to 25KHz). Miniature J-T valve utilizing
Cu- Mn - or Ce- based SMAs enable operation without electric motor moving
parts due to reversible martensite phase transformation. The miniature J-T
coolers utilizing SMAs present achievements of dramatically reduction over
currently available J-T cryo-coolers as follows: (1)- orifice clogging, (2)-
valve size-mass, (3) - energy consumption, and (4) -vibrations during J-T
valve operation. J-T valve operation utilizing SMAs prevents clogging by
coolant contaminants due to great increasing throttle opening tolerance
under reversible phase transformations.

Miniature J-T cryocooler utilizing SMAs offer variety of commercial
applications for satellite, airspace, and instruments where the
low-vibration at cryogenic temperatures is crucial. Miniature J-T cryo-
cooler utilizing SMAs reliable for long term operation without electric
motor moving parts. Potential commercial applications include: efficient
miniature coolers for cryogenic applications, regulator systems for defense
/space electronic-optic systems, solid-state crystal detectors applied for
instrumentation utilizing physics of X-ray detection. Miniature J-T cooler
can be integrated with solid state detector (semiconductor crystal) applied
for microanalysis, automated ultra-scan map, digital imaging, digital
control for precise positioning of electron beam adapted for advanced
technology to manufacture integral circuit central processing units.
Self-operating J-T Cryo-coolers operate at temperatures range of
High-Temperature Superconductors (HTSC) therefore have the potential to
provide inexpensive , accurate refrigeration temperature wherever HTSC are
used. Miniature J-T coolers suitable for biological and micro medical
storage applications.

NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR (Name, Organization Name, Mail Address, City/State/Zip)
Vladimir Brik
Research & Technology Corporation
3905 School Road
Madison , WI   53704 - 1325

NAME AND ADDRESS OF OFFEROR (Firm Name, Mail Address, City/State/Zip)
Research & Technology Corporation
3905 School Road
Madison , WI   53704 - 1325

Form Printed on 06-19-01 15:44