Last edited by Tojajar
Thursday, July 16, 2020 | History

3 edition of Protocol for atomic oxygen testing of materials in ground-based facilities found in the catalog.

Protocol for atomic oxygen testing of materials in ground-based facilities

Protocol for atomic oxygen testing of materials in ground-based facilities

  • 137 Want to read
  • 22 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Oxygen atoms.,
  • Materials tests.,
  • Standards.,
  • Hazards.,
  • Ground tests.,
  • Component reliability.

  • Edition Notes

    StatementTimothy K. Minton ; by Jet Propulsion Laboratory.
    SeriesNASA contractor report -- NASA CR-112589.
    ContributionsJet Propulsion Laboratory (U.S.), United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15504770M

    Evaluates synergistic effects of low earth orbit atomic oxygen and vacuum ultraviolet (VUV) radiation on materials. Provides accelerated rates of exposure to a directed or scattered beam of atomic oxygen with or without (VUV) radiation. Electron-cyclotron resonance (ECR) plasma source operated on pure oxygen in vacuum generates low-energy beam. Evaluation of an Oxygen Protocol in Long-Term Care Sherrie L Christman CRT and Teresa A Volsko MHHS RRT FAARC OBJECTIVE: The purpose of this study was to determine the effect of protocol-directed recom-mendations for oxygen therapy implemented by respiratory therapists in skilled nursing facilities.

    Biomedical Laboratories and Animal Research Facilities. Oxygen monitoring devices are required in certain other locations under the OSHA confined space regulation. The confined space regulation may have some applicability and should be reviewed in conjunction with this protocol . Atom oxygen (AO) can cause most spacecraft material erosion seriously. Liquid-exfoliated graphene by jet cavitation was used to coat Kapton employed on spacecraft to enhance its AO erosion resistance. The coating was prepared by vacuum filtering and transferring. After AO exposure, compared with naked Kapton, the mass loss of coated Kapton reduced to % and the erosion yield reduced to %.

    Guidelines for Oxygen System Design, Materials Selection, Operations, Storage, and Transportation Johnson Space Center White Sands Test Facility. The expertise of these professionals in the area MATERIALS TESTING METHODS AND TEST DATA B-1 APPENDIX C: DESIGN EXAMPLES C-1 APPENDIX D: PRESSURE VESSELS - TESTING, INSPECTION, AND. Medical oxygen is used by patients in healthcare facilities for life support and for medical treatment. It is vital to ensure that the medical oxygen supply system provides a safe and reliable supply of oxygen to healthcare facilities and patients as end user. Past experience indicated that the consequence of system failure could be very serious.


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Protocol for atomic oxygen testing of materials in ground-based facilities Download PDF EPUB FB2

This second version of the "Protocol for Atomic Oxygen Testing of Materials in Ground-Based Facilities" is incrementally revised over the first version.

The objective and basic form remain unchanged. However, new knowledge that has been generated by the Ballistic Missile. Get this from a library.

Protocol for atomic oxygen testing of materials in ground-based facilities. [Timothy K Minton; Jet Propulsion Laboratory (U.S.); United.

Protocol for atomic oxygen testing of materials in ground-based facilities. [Washington, DC: Springfield, Va: National Aeronautics and Space Administration ; National Technical Information Service, distributor.

MLA Citation. Minton, Timothy K. and Jet Propulsion Laboratory (U.S.). and United States. National Aeronautics and Space Administration. The intent of these practices is to define atomic oxygen exposure procedures that are intended to minimize variability in results within any specific atomic oxygen exposure facility as well as contribute to the understanding of the differences in the response of materials when tested in different facilities.

The Effects of Atomic Oxygen on the Outgassing Properties of Spacecraft Materials Eli Z. Gurnee The space environment contains many harsh characteristics that are harmful to spacecraft and threaten the success of space missions.

Atomic oxygen (AO) and outgassing are among the chief concerns that spacecraft engineers must design for in order to ensure the safety of a spacecraft. Atomic oxygen flux and ionizing radiation can be measured by a variety of techniques which are either extremely expensive, require retrieval of samples, or difficult to implement on board small spacecraft.

In this study, we present validation test results of the on-orbit materials degradation detector, in a series of ground-based measurements. Minton, T. K., “Protocol for Atomic Oxygen Testing of Materials in Ground-Based Facilities, Version Number 2,” Jet Propulsion Laboratory, PublicationCalifornia Inst.

of Technology, Pasadena, CA, Google Scholar. Atomic oxygen (Atox) exposure test facility is required to simulate the space like environment/ condition in the ground to understand the surface erosion/ oxidization mechanism of different spacecraft materials. ISRO is planning to establish an atomic oxygen exposure test facility along with a.

Abstract. Results of simulation tests of protective and functional coatings influence on resistance of polymeric constructional spacecraft materials to impact of atomic oxygen with fluences up to × 10 22 cm-2 are presented.

It was demonstrated that oxygen plasma beams can be used in accelerated tests of carbon-based and polymeric materials (with the exception of fluorinated hydrocarbons.

Oxygen Protocol Purpose To standardize the assessment of a patient's oxygenation status to ensure that a therapeutic level of oxygen is being delivered.

To identify those patients with a history or chronic hypercarbia who may be at risk for oxygen-induced hypoventilation. To establish guidelines for the therapeutic delivery of O 2.

Understanding Atomic Oxygen Oxygen comes in several different forms. The oxygen that we breathe is called O 2 —that is, it is comprised of two atoms of oxygen. O 3 is ozone, such as occurs in Earth's upper atmosphere, and O (one atom), is atomic oxygen.

Atomic oxygen doesn't exist naturally for very long on the surface of Earth, as it is very. atomic oxygen, corrosion, space, low earth orbit, LEO, ATOX, flight testing, on-ground testing Abstract The corrosion in space is described by the effect of atomic oxygen on several materials. The metal which was most affected is silver.

Silver oxidizes according to a linear-parabolic law and due to the thermal stresses the oxide layer continuously. Oxygen molecules (two oxygen atoms bonded together as O 2) decompose into two separate oxygen atoms, or atomic oxygen.

Because the unpaired atoms react very easily with other materials, they are very destructive to spacecraft and satellites, but very beneficial for cleaning surfaces on Earth.

• Atomic oxygen is the most predominant specie in LEO • Atomic oxygen is reactive and energetic enough to break chemical bonds in materials • Reaction products with polymers and carbon containing materials are volatile (typically CO and CO 2) • Metals and inorganics experience surface oxidation in some cases leading to.

Atomic oxygen. The effects of atomic oxygen (monatomic oxygen) bombardment were originally highlighted with the early shuttle flights, by a visible effect on exposed polymer surfaces such as Kapton, where changes in characteristics due to atomic oxygen were found to cause undesirable temperature excursions in low Earth orbit and shorten the useful lifetime of many spacecraft components.

Atomic oxygen interaction with spacecraft materials: Relationship between orbital and ground-based testing for materials certification. The monatomic oxygen molecules then collide with O 2 molecules to form ozone, which is O 3.

Thus, ozone consists of O 2 with a loosely bonded third oxygen atom that is readily available to attach to, and oxidize, other molecules.

This additional oxygen atom makes ozone a powerful oxidant that destroys microorganisms but is highly unstable (i.e. atomic oxygen, corrosion, space, low earth orbit, LEO, ATOX, flight testing, on-ground testing Abstract The corrosion in space is described by the effect of atomic oxygen on several materials.

The metal which was most affected is silver. Silver oxidises according to a linear-parabolic law and due to the thermal stresses the oxide layer continuously. Atomic Oxygen Testing of MgF2 Coatings Abstract: Spacecraft orbiting below about nm are exposed to a high flux of atomic oxygen (AO) that can severely degrade surface materials, yet some coatings used on solar cell coverglass have never been qualified in this environment.

Combined effects tests comprising atomic oxygen exposure. The atomic oxygen (AO) resistance of these PI/POSS hybrid films was tested in the ground-based AO simulation facility.

Exposed and unexposed surfaces were characterized by SEM and XPS. The SEM images showed that the surface of the 20 wt.% PI/POSS became much less rough than that of the pristine PI.

"Comparison of the Atomic Oxygen Erosion Depth and Cone Height of Various Materials at Hyperthermal Energy" D. Waters, B. Banks, S. Thorson, K. de Groh & S. Miller "Undercutting Studies of Protected Kapton® H Exposed to In-Space and Ground-based Atomic Oxygen" A.

Snyder & B.A. Banks S8 Ground Testing Chairs: M. van Eesbeek and J. Dever. This paper describes results of ground-based simulation of atomic oxygen influence on samples of polymer composites with different fillers.

Polyimide and polyamide-imide were used as matrices, and polyorganosiloxanes, inorganic nanoparticles of Al 2 O 3, TiO 2, WC, multiwalled carbon nanotubes, and detonation nanodiamonds were used as on mass loss of composite .Beam predominantly neurtral atomix oxygen with ion content of less than 1 percent at energies below 30 electron volts.

Atomic oxygen arrival flux is controllable within range of to atoms/cm2-sec. Vacuum ultraviolet radiation emitted by source can irradiate samples or be blocked allowing only atomic oxygen exposure.