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  • 1
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    Radiation Induced Degradation of White Thermal Control Paint (1998)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: This paper details a comparison analysis of the zinc-oxide pigmented white thermal control paints Z-93 and Z-93P. Both paints were simultaneously exposed to combined space environmental effects and analyzed using an in-vacuo reflectance technique. The dose applied to the paints was approximately equivalent to 5 yr in a geosynchronous orbit. This comparison analysis showed that Z-93P is an acceptable substitute for Z-93. Irradiated samples of Z-93 and Z-93P were subjected to additional exposures of ultraviolet (UV) radiation and analyzed using the in-vacuo reflectance technique to investigate UV activated reflectance recovery. Both samples showed minimal UV activated reflectance recovery after an additional 190 equivalent Sun hour (ESH) exposure. Reflectance response utilizing nitrogen as a repressurizing gas instead of air was also investigated. This investigation found the rates of reflectance recovery when repressurized with nitrogen are slower than when repressurized with air.
    Keywords: Nonmetallic Materials
    Type: 20th Space Simulation Conference: The Changing Testing Paradigm; 161-172; NASA/CR-1998-208598-Preprint
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Fluorescence measurements of the thermal control experiments coatings on LDEF S0069 and A0114 (1993)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Fluorescence measurements were made on the thermal control coatings from the Long Duration Experiment Facility (LDEF) S0069, Thermal Control Surfaces Experiment (TCSE); and the A0114, Interaction of Atomic Oxygen with Material Surfaces in Low Earth orbit. Fluorescence was observed in two types of thermal control coatings and is attributed to pigments or binders. In addition, fluorescence measurement on the silver Teflon from the front cover of TCSE led to confirmation of damage (cracking) to the metal layers during application.
    Keywords: NONMETALLIC MATERIALS
    Type: NASA. Langley Research Center, LDEF: 69 Months in Space. Part 3: Second Post-Retrieval Symposium; p 1111-1123
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  • 3
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    Environmental monitoring for Space Station WP01 (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: External contamination monitoring instrumentation for the Space Station work package one (WP01) elements, were imposed on the contractor as deliverable hardware. The monitoring instrumentation proposed by the WP01 contractor in response to the contract requirement includes both real time measurements and passive samples. Real time measurement instrumentation consists of quartz crystal microbalances for molecular deposition, ion gaseous species identification. Internal environmental contamination monitoring for particulates is included in both Lab and HAB modules. Passive samples consists of four sample mounting plates mounted external to the Space Station modules, two on the U.S. LAB, and two on the HAB module.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Space Station Induced Monitoring; p 5-12
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  • 4
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    Radiation Induced Degradation of White Thermal Control Paint (1999)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: This paper details a comparison analysis of the zinc-oxide pigmented white thermal control paints Z-93 and Z-93P. Both paints were simultaneously exposed to combined space environmental effects and analyzed using an in-vacuo reflectance technique. The dose applied to the paints was approximately equivalent to 5 yr in a geosynchronous orbit. This comparison analysis showed that Z-93P is an acceptable substitute for Z-93. Irradiated samples of Z-93 and Z-93P were subjected to additional exposures of ultraviolet (UV) radiation and analyzed using the in-vacuo reflectance technique to investigate UV activated reflectance recovery. Both samples showed minimal UV activated reflectance recovery after an additional 190 equivalent Sun hour (ESH) exposure. Reflectance response utilizing nitrogen as a repressurizing gas instead of air was also investigated. This investigation found the rates of reflectance recovery when repressurized with nitrogen are slower than when repressurized with air.
    Keywords: Nonmetallic Materials
    Type: 20th Space Simulation Conference: The Changing Testing Paradigm; 207-218; NASA/CP-1999-208598
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  • 5
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    Radiation Induced Degradation of the White Thermal Control Paints Z-93 and Z-93P (1996)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This paper details a comparison analysis of the zinc oxide pigmented white thermal control paints Z-93 and Z-93P. Both paints were simultaneously exposed to combined space environmental effects and analyzed using an in-vacuo reflectance technique. The dose applied to the paints was approximately equivalent to 5 years in a geosynchronous orbit. This comparison analysis showed that Z-93P is an acceptable substitute for Z-93. Irradiated samples of Z-93 and Z-93P were subjected to additional exposures of ultraviolet (UV) radiation and analyzed using the in-vacuo reflectance technique to investigate UV activated reflectance recovery. Both samples showed minimal UV activated reflectance recovery after an additional 190 equivalent sun hour (ESH) exposure. Reflectance response utilizing nitrogen as a repressurizing gas instead of air was also investigated. This investigation found the rates of reflectance recovery when repressurized with nitrogen are slower than when repressurized with air.
    Keywords: Nonmetallic Materials
    Type: NASA-TM-108518 , NAS 1.15:108518
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  • 6
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    Measurement of transient reflectance (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Real-time reflectometer, adjusted to a fraction of a second, monitors transient effects and allows sample to be exposed to environment continuously. Reflectance and reference signals share same optical path, minimizing extraneous effects.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-23160 , NASA Tech Briefs (ISSN 0145-319X); 1; 1; P. 46
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  • 7
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    Infrared emission during a simulated lunar eclipse. (1967)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: IR emission measurement of lunar-like materials during simulated eclipse, noting dependence on time
    Keywords: SPACE SCIENCES
    Type: AIAA PAPER 67-290
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  • 8
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    Infrared emission during simulated lunar eclipse. (1967)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: IR emission measurement of lunar-like materials during simulated eclipse, noting dependence on time
    Keywords: SPACE SCIENCES
    Type: AIAA PAPER 67-290 , ; - QUANTUM ELECTRONIC|THERMOPHYSICS SPECIALIST CONFERENCE; Apr 17, 1967 - Apr 20, 1967; NEW ORLEANS, LA
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  • 9
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    Research Furnace for Crystal Preparation (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Three-zone furnace tested and characterized for preparation of lead-tintelluride (LTT) crystals. Tests show temperature in furnace controlled to obtain constant rate of movement of high-temperature isotherm down length of furnace. Temperature profiles accurately controlled by three independent heaters. Control software brings separate heaters to any desired temperature.
    Keywords: MATERIALS
    Type: LAR-13302 , NASA Tech Briefs (ISSN 0145-319X); 9; 4; P. 114
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  • 10
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    Real time reflectometer (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A real time reflectometer with the particular utility of measuring fairly rapid (transient) changes in the specular reflectance of a sample which is continuously exposed to a perturbing environment is described. A fixed radiation source, a fixed detector, a uniformly rotating sample wheel, and a uniformly rotating optical wheel protect against misalignment problems. The reflectometer operates by comparing the measurings of a reflected signal with that of a reference signal made within fractions of a second of one another. Reflectance is measured in the infrared, visible, and vacuum ultraviolet regions.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: application/pdf
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