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Design concepts for the ASTROMAG cryogenic systemDescribed is a proposed cryogenic system used to cool the superconducting magnet for the Space Station based ASTROMAG Particle Astrophysics Facility. This 2-meter diameter superconducting magnet will be cooled using stored helium II. The paper presents a liquid helium storage concept which would permit cryogenic lifetimes of up to 3 years between refills. It is proposed that the superconducting coil be cooled using superfluid helium pumped by the thermomechanical effect. It is also proposed that the storage tank be resupplied with helium in orbit. A method for charging and discharging the magnet with minimum helium loss using split gas-cooled leads is discussed. A proposal to use a Stirling cycle cryocooler to extend the storage life of the cryostat will also be presented.
Document ID
19880003678
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Green, M. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Castles, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 5, 2013
Publication Date
June 1, 1987
Subject Category
Solid-State Physics
Report/Patent Number
NASA-CR-181505
DE87-014683
NAS 1.26:181505
CONF-8706125-13
LBL-23822
Accession Number
88N13060
Funding Number(s)
CONTRACT_GRANT: DE-AC03-76SF-00098
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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