Download or read book Atomic Oxygen Exposure of Power System and Other Spacecraft Materials written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to test their reactivity with Atomic Oxygen, twenty five materials were flown on the EOIM-3 (Evaluation of Oxygen Interactions with Materials) portion of the STS-46 Mission. These materials include refractory metals, candidate insulation materials, candidate radiator coatings, and a selection of miscellaneous materials. This report documents the results of the pre- and post-flight analysis of these materials. Morton, Thomas L. and Ferguson, Dale C. Glenn Research Center NASA-TM-107427, NAS 1.15:107427, E-10673 RTOP 506-41-23...
Download or read book Atomic Oxygen Exposure of Power System and Other Spacecraft Materials Results of the EOIM 3 Experiment written by and published by . This book was released on 1997 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomic Oxygen Effects on Spacecraft Materials written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Earth orbital (LEO) atomic oxygen cannot only erode the external surfaces of polymers on spacecraft, but can cause degradation of surfaces internal to components on the spacecraft where openings to the space environment exist. Although atomic oxygen attack on internal or interior surfaces may not have direct exposure to the LEO atomic oxygen flux, scattered impingement can have can have serious degradation effects where sensitive interior surfaces are present. The effects of atomic oxygen erosion of polymers interior to an aperture on a spacecraft is simulated using Monte Carlo computational techniques. A 2-dimensional model is used to provide quantitative indications of the attenuation of atomic oxygen flux as a function of distance into a parallel walled cavity. The degree of erosion relative is compared between the various interior locations and the external surface of an LEO spacecraft. Banks, Bruce A. and Miller, Sharon K. R. and deGroh, Kim K. and Demko, Rikako Glenn Research Center NASA/TM-2003-212484, NAS 1.15:212484, E-14026
Download or read book Spacecraft Lithium Ion Battery Power Systems written by Thomas P. Barrera and published by John Wiley & Sons. This book was released on 2023-01-24 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spacecraft Lithium-Ion Battery Power Systems Helps Readers Better Understand the Design, Development, Test, and Safety Engineering of Spacecraft Lithium-Ion Battery Power Systems Written by highly experienced spacecraft engineers and scientists working at the heart of the industry, Spacecraft Lithium-Ion Battery Power Systems is one of the first books to provide a comprehensive treatment of the broad area of spacecraft battery power systems technology. The work emphasizes the technical aspects across the entire lifecycle of spacecraft batteries including the requirements, design, manufacturing, testing, and safety engineering principles needed to field a reliable spacecraft electrical power system. A special focus on rechargeable lithium-ion battery technologies as they apply to manned and unmanned Earth-orbiting satellites, Cubesats, planetary mission spacecraft (such as orbiters, landers, rovers, and probes), and launch vehicle applications is emphasized. Using a systems engineering approach, the book smoothly bridges knowledge gaps that typically exist between academic and industry practitioners. Sample topics of discussion and learning resources included in the work include: Detailed systematic technical treatment of spacecraft LIB power systems across the entire lithium-ion battery life cycle Principles of lithium-ion cell and battery design, battery management systems, electrical power systems, safety engineering, life cycle testing, ground processing, and on-orbit mission operations Special topics such as requirements engineering, qualification testing, safety hazards and controls, reliability analysis, life modeling and prediction, on-orbit battery power system management, and decommissioning strategies New and emerging on-orbit space applications of LIBs supporting commercial, civil, and government spacecraft missions (International Space Station, Galileo, James Webb Telescope, Mars 2020 Perseverance Rover, Europa Clipper) Real space industry case studies of deployed Earth-orbiting satellite, astronaut, and planetary mission spacecraft lithium-ion batteries Overall, the work provides professionals supporting the commercial, civil, and government aerospace marketplace with key knowledge and highly actionable information pertaining to lithium-ion batteries and their specific applications in modern spacecraft systems.
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1983 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cities and Their Vital Systems written by Advisory Committee on Technology and Society and published by National Academies Press. This book was released on 1989 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cities and Their Vital Systems asks basic questions about the longevity, utility, and nature of urban infrastructures; analyzes how they grow, interact, and change; and asks how, when, and at what cost they should be replaced. Among the topics discussed are problems arising from increasing air travel and airport congestion; the adequacy of water supplies and waste treatment; the impact of new technologies on construction; urban real estate values; and the field of "telematics," the combination of computers and telecommunications that makes money machines and national newspapers possible.
Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1990 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Earth Orbital Atomic Oxygen Environmental Simulation Facility for Space Materials Evaluation written by and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Atomic Oxygen on the Outgassing Properties of Spacecraft Materials written by Eli Z. Gurnee and published by . This book was released on 2014 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. AO is monatomic oxygen (O1) that is created when Ultraviolet (UV) radiation photochemically disassociates diatomic oxygen (O2) in space. AO is the dominant atmospheric constituent between 175 and 600 km, and is a great concern in low earth orbits. Orbital AO has an average impact energy of 4.5 ± 1 eV with orbiting spacecraft and is also very reactive; this makes AO very corrosive to spacecraft materials. Outgassing is the process by which trapped and adsorbed gases are expelled from materials. The high temperatures and low pressure of the spacecraft environment exacerbate the process of outgassing. Outgassing is problematic for spacecraft because outgassed material can condense on sensitive surfaces such as optical and thermal surfaces, or the material can create clouds that impede sensors ability to observe their target. While it has been shown that many aspects of the spacecraft environment act synergistically together to further degrade spacecraft performance, there is very little information and data available on the interactions between AO and outgassing. Cal Poly’s Space Environments Lab is equipped with an AO simulation vacuum chamber (MAX) and an outgas testing chamber (Micro-VCM) which is capable of testing materials for total mass loss (TML) and collected volatile condensable mass (CVCM) outgassing values. MAX and Micro-VCM were used in tandem to test different spacecraft materials in order to determine if AO exposure had any effect on the respective materials TML and CVCM values. Prior to conducting testing, Micro-VCM was refurbished and validated since it was recently donated to Cal Poly and was not in working order upon arrival. Three Sheldahl materials were tested: aluminum coated 1.0 mil Kapton tape, 2.0 mil Kapton film coated with ITO on one side and aluminum on the other, and 2.0 Kapton film coated with aluminum. The materials were exposed to an average AO fluence of 1.33 ± 0.130 × 1021 atoms/cm2 for AO testing. The TML and CVCM results from four of the six tests did not show any significant changes between AO samples and control samples, partially due to large error bars that stem from using a semi-microbalance instead of a full microbalance. However, the AO exposed ITO-Kapton-Al did show an increase in TML from -0.03 ± 0.09% to 0.19 ± 0.08% for one procedure, while the aluminum Kapton tape CVCM decreased from 0.81 ± 0.12% to 0.63 ± 0.12% for another procedure. These results show that two materials exhibited a change in their outgassing properties after AO exposure. More testing on the subject is warranted and should be conducted in order to collect more data points and begin defining trend lines that can further describe the effects of AO on outgassing.
Download or read book Space Station Systems written by and published by . This book was released on 1987 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Technology 1998 written by and published by DIANE Publishing. This book was released on with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomic Oxygen Effects on Spacecraft Materials written by and published by . This book was released on 2003 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomic Oxygen Interaction with Spacecraft Materials written by and published by . This book was released on 1991 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of atomic oxygen on boron nitride, silicon nitride, solar cell interconnects used on the Intelsat 6 satellite, organic polymers, and MoS2 and WS2 dry lubricant have been studied in low Earth orbit (LEO) flight experiments and in our ground-based simulation facility at Los Alamos National Laboratory. Both the in-flight and ground-based experiments employed in situ electrical resistance measurements to detect penetration of atomic oxygen through materials and ESCA analysis to measure chemical composition changes. In the presence of atomic oxygen, silver oxidizes to form silver oxide, which has a much higher electrical resistance than pure silver. Permeation of atomic oxygen through BN overcoated on thin silver was observed. No permeation of atomic oxygen through Si3N4 was observed. Test results on the Intelsat 6 satellite interconnects used on its photovoltaic array indicate that more than 60--80% of the original thickness of silver should remain after completion of the proposed Space Shuttle rescue/reboost mission. Gas phase reaction products produced by the interaction of high kinetic energy atomic oxygen (AO) with Kapton were found to be H2, H2O, CO, and CO2 with NO being a possible secondary product. Hydrogen abstraction at high AO kinetic energy is postulated to be the key reaction controlling the erosion rate of Kapton. An Arrhenius-like expression having an activation barrier of 0.4 eV can be fit to the data, which suggests that the rate limiting step in the AO/Kapton reaction mechanism can be overcome by translational energy. Oxidation of MoS2 and WS2 dry lubricants in both ground-based and orbital exposures indicated the formation of MoO3 and WO3 respectively. A protective oxide layer is formed (almost equal to)30 monolayers thick which has a high initial friction coefficient until the layer is worn off.
Download or read book Government Research Directory written by Cengage Gale and published by Gale Cengage. This book was released on 2008-12 with total page 1364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In space Technology Development Atomic Oxygen and Orbital Debris Effects written by James T. Visentine and published by . This book was released on 1989 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
