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Gas Control System for HEAO-BThe HEAO-B Gas Control System consists of a high pressure gas storage supply together with distribution and regulation assemblies and their associated electronics for management of gas required for HEAO-B X-ray counter experiments. The Gas Control System replenishes a gas mixture (82 percent argon, 12.3 percent carbon dioxide, 5.7 percent xenon) in the counter volumes which is lost by: diffusion through controlled leakage plugs, diffusion through counter windows, and consumption resulting from periodic purges. The gas density in each counter volume is maintained constant to within 0.25 percent by comparison with a sealed reference volume. The system is fully redundant, capable of operating at atmospheric pressure as well as in a vacuum, contains interlocks which shut down gas flow in the event of either leakage or excessive pressure, and is able to shut down counter high voltage if counter pressure is abnormally low. The system is electronically controlled by ground command and self-sustaining in orbit for a period of at least one year.
Document ID
19780041405
Document Type
Reprint (Version printed in journal)
Authors
Taylor, B. (American Science and Engineering, Inc. Cambridge, MA, United States)
Brissette, R. (American Science and Engineering, Inc. Cambridge, MA, United States)
Humphrey, A. (American Science and Engineering, Inc. Cambridge, MA, United States)
Morris, J. (American Science and Engineering, Inc. Cambridge, Mass., United States)
Luger, J. (American Science and Engineering, Inc. Cambridge, MA, United States)
Swift, W. (Parker-Hannifin Corp. Irvine, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
February 1, 1978
Subject Category
SPACECRAFT DESIGN, TESTING AND PERFORMANCE
Funding Number(s)
CONTRACT_GRANT: NAS8-30750
Distribution Limits
Public
Copyright
Other