A facility to produce an energetic, ground state atomic oxygen beam for the simulation of the Low-Earth Orbit environment

Details A facility to produce an energetic, ground state atomic oxygen beam for the simulation of the Low-Earth Orbit environment A facility to produce an energetic, ground state atomic oxygen beam for the simulation of the Low-Earth Orbit environment

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994nascp3280..121k&link_type=abstract

In NASA. Goddard Space Flight Center, Eighteenth Space Simulation Conference: Space Mission Success Through Testing p 121-138 (S

Computer Science

Atmospheric Composition, Earth Orbital Environments, Ground State, Low Pressure, Mass Flow, Oxygen Atoms, Research Facilities, Space Environment Simulation, Tethering, Atomic Beams, Charge Exchange, Containment, Gas Density, Ion Engines, Leakage, Loads (Forces), Vacuum Apparatus

Scientific paper

Because 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.

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