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A facility to produce an energetic, ground state atomic oxygen beam for the simulation of the Low-Earth Orbit environmentBecause of the continuing commitment to activity in low-Earth orbit (LEO), a facility is under development to produce energetic atmospheric species, particularly atomic oxygen, with energies ranging from 5 to 80 eV. This relatively high flux facility incorporates an ion engine to produce the corresponding specie ion which is charge exchanged to produce a neutral atomic beam. Ion fluxes of around 10(exp 15) sec(exp -1) with energies of 20-70 eV have been achieved. A geometrically augmented inertially tethered charge exchanger (GAITCE) was designed to provide a large column depth of charge exchange gas while reducing the gas load to the low pressure portion of the atomic beam facility. This is accomplished using opposed containment jets which act as collisional barriers to the escape of the dense gas region formed between the jets. Leak rate gains to the pumping system on the order of 10 were achieved for moderate jet mass flows. This system provides an attractive means for the charge exchange of atomic ions with a variety of gases to produce energetic atomic beams.
Document ID
19950007659
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ketsdever, Andrew D. (Phillips Lab. Edwards AFB, CA, United States)
Weaver, David P. (Phillips Lab. Edwards AFB, CA, United States)
Muntz, E. P. (Phillips Lab. Edwards AFB, CA, United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1994
Publication Information
Publication: NASA. Goddard Space Flight Center, Eighteenth Space Simulation Conference: Space Mission Success Through Testing
Subject Category
Atomic And Molecular Physics
Accession Number
95N14072
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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