DESIGN AND DEVELOPMENT OF A HYPER-THERMAL ATOMIC OXYGEN WIND TUNNEL FACILITY

Abstract

A hyper-thermal orbital aerodynamics test facility is described. The Rarefied Orbital Aerodynamics Research facility (ROAR) is a dedicated apparatus designed to simulate the atmospheric flow in very low Earth orbits (VLEO) to investigate the impact different material properties have on gas-surface interactions, and determine the aerodynamic properties of materials from the reemitted gas distribution. The main characteristics observed in VLEO to be reproduced are the free molecular flow regime and the flux of oxygen atoms at orbital velocities impinging on the spacecraft surface. This is accomplished by combining an ultra-high vacuum system with a hyper-thermal oxygen atoms generator. Materials performance will be assessed via a scattering experiment in which an atomic oxygen beam is incident on the surface of a test sample and the scattered species are recorded by mass spectrometers. The design of the experiment is discussed, from the specification of the vacuum components to the generation of oxygen atoms and their detection.

Divisions: Engineering & Applied Sciences > Chemical Engineering & Applied Chemistry
Event Title: ISMSE 2018 - International Symposium on Materials in the Space Environment
Event Type: Other
Event Dates: 2018-10-01 - 2018-10-05
Full Text Link: http://www.isms ... uploads/162.pdf
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PURE Output Type: Conference contribution
Published Date: 2019-01-01
Accepted Date: 2018-10-01
Authors: Oiko, V. T. A.
Roberts, Peter
Edmondson, Stephen
Worrall, Stephen D ( 0000-0003-1969-3671)
Haigh, Sarah J.
Smith, Katharine
Crisp, Nicholas
Lyons, Rachel
Livadiotti, Sabrina
Huyton, Claire
Sinpetru, Luciana
al, et

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