Active cleaning technique for removing contamination from optical surfaces in space
Development of gas plasma cleaning technique for removing contaminants from optical surfaces in space environments
Gillette, R. B.↗
SEARCH · Engineering Papers
Results for “Contamination”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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A study of physiochemical factors affecting charcoal adsorption of contaminants in manned space craft atmosphere
Physiochemical factors affecting activated charcoal adsorption of contaminants using mathematical models - tables
Deuel, C. L.↗
Preliminary studies of metallic bonding between liquid mercury and trace contaminants using a new sampling technique
Microsampling technique used to study metallic bonding between liquid mercury and trace contaminants
Razner, R.↗
Development of a portable direct reading spectrometer to monitor oxygen-hydrogen containing contaminants in gas tungsten-arc process shields
Portable direct reading spectrometer for monitoring oxygen-hydrogen containing contaminants in gas tungsten arc welding process
Gordon, E. S.↗
Identity of a common contaminant of Apollo 11 lunar fines and Apollo 12 York meshes
Apollo 11 and 12 lunar soil samples common contaminant identified as diisopropyl disulfide, using chromatograph mass spectrometer
Flory, D.↗
Evaluation of orbital optical contamination phenomena and its effect on astronomical experiments
Orbital environment contamination and effect on optical instruments and astronomical experiments in Skylab Program
Majoros, J.↗
Ground contamination monitoring devices for the Apollo Telescope Mount
Optical ground contamination monitoring devices for Apollo Telescope Mount collecting time-line and integrated data
Zwiener, J. M.↗
Measurement and application of contaminant optical constants
Contamination degrading effects on optical surfaces, discussing application to real time monitors data analysis
Linton, R. C.↗
Light scatter from contaminated spacecraft windows
Spacecraft windows optical degradation from contamination with condensed particles, presenting light scatter measurement results
Heinisch, R. P.↗
A survey of contamination of spacecraft surfaces
Spacecraft surface contamination, noting effects on thermal control and optical equipment
Cothran, C. A.↗
Analysis of trace contaminants
Composition and daily fluctuations of trace contaminants during 90-day space station simulator test
Honorof, E. P.↗
Discoloration and lunar dust contamination of Surveyor III surfaces
Surveyor 3 surfaces discoloration and lunar dust contamination, noting Apollo 12 lunar module caused disturbances by on-site observation
Blair, P. M.↗
Trace contaminant adsorption and sorbent regeneration in closed ecological systems
Correlation was obtained for determining sorptive capacity of carbon for pure and mixed contaminants under dry and humid conditions at various temperatures. Vacuum desorption rates were investigated for single particles and for sorbent beds. For sorbent beds, rate-determining step is Knudsen diffusion through interparticle voids.
Arnold, C. R.↗
Bibliography: Codes, standards, procedures, specifications and reports relating to contamination control
The bibliography is arranged in separate sections under headings that include: (1) spacecraft cleanliness, (2) general cleaning, (3) clean room and work stations, (4) contamination, (5) decontamination, (6) manufacturing, (7) miscellaneous, (8) particle count analysis, (9) passivation, (10) packaging, (11) water, and (12) acids and detergents.
Ledoux, F. N.↗
Quantitation of buried contamination by use of solvents. Part 1: Solvent degradation of amine cured epoxy resins
The solubility and/or swelling of cured epoxy resins was studied using the solubility parameter method. Determination of solubility parameters were found in order to select solvents for solvent-assisted degradation of cured epoxy polymers used in spacecraft. A method for improving recovery of seeded spores is suggested for assay of buried contaminants. Three commercial epoxy resins were cured using four different alkyl amines. For each resin-amine combination, three levels of amine were used, corresponding to 1/3, 2/3, and all of the amine required to react with the oxirane groups of the resin. The solubility parameters of the 36 resulting model compounds were determined in poorly and moderately hydrogen-bonded solvents. No strongly hydrogen-bonded solvents caused dissolution or swelling. The tolerance of cured resins is discussed in terms of polymer structure.
Rheineck, A. E.↗
Radiation effects on contaminants from the outgassing of silastic 140 RTV
Exposure of the volatile condensable material (VCM) from Silastic 140 RTV adhesive sealant to 147. 0-nm radiation, simulating the space radiation environment in synchronous earth orbits, induces absorption of visible light by the VCM. This results in an increase in the absorptance of coated optical elements, such as solar cell cover glasses and second-surface mirrors for thermal control. A contaminant thickness of 0.1 micron or more could result in a change in solar absorptance of the second-surface mirrors from 0.06 to approximately 0.16 in a period of about 1.5 years in space. Calculations indicated that the VCM thickness would have to be less than approximately 0.005 micron to keep the change in solar absorptance 0.01 for a 3-year mission.
Jones, P. F.↗
Environmental simulation testing of solar cell contamination by hydrazine
Test results for thermal vacuum and radiation environment simulation of hydrazine contamination are discussed. Solar cell performance degradation, measured by short circuit current, is presented in correlation with the variations used in environmental parameters.
Moore, W. W., Jr.↗
A contamination experiment investigating the failure of the Nimbus 4 filter wedge spectrometer
A ground test is described wherein a quartz crystal microbalance was used in defining the quantity and direction of a contaminant. The cause of the failure of an experiment in orbit was thus confirmed.
Kruger, R.↗