NASA Goddard Cryogenics Group
The SHOOT Cryogenic System M.J. DiPirro,R.F. Boyle,O. Figueroa,D. Lindauer,D.C. McHugh, and P.J. Shirron
Code 713
NASA/Goddard Space Flight Center
Greenbelt, MD 20771

Published in Superfluid Helium Heat Transfer (United Engineering Center, New York, NY, ed. J. P. Kelly and W. J. Schneider) (1990) 29

The Superfluid Helium On-Orbit Transfer Flight Demonstration (SHOOT) will demonstrate the technology necessary to accomplish a resupply of superfluid helium in space. SHOOT is a shuttle attached payload consisting of two 210 liter dewars connected by a transfer line. The transfer of superfluid is accomplished by using the thermomechanical (or fountain) effect[1]. Components developed for SHOOT include high rate, nearly ideal thermomechanical pumps, liquid acquisition devices, superfluid leak-tight, stepper motor driven valves, modular cryogenic burst disks, low throughput cryogenic relief valves, liquid/vapor detectors, phase separators that work with He I as well as superfluid helium (He II), and a mass gauging system which has a resolution of better than 1 percent. Some of the interesting dewar fabrication techniques as well as a summary of the component developments and tests are discussed.

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