Durability of Ito-Mgf2 Films for Space-Inflatable Polymer Structures PDF Download
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721590322
Category :
Languages : en
Pages : 28
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Book Description
This paper presents results from ITO-MgF2 film durability evaluations that included tape peel, fold, thermal cycle, and AO exposure testing. Polymer coupon preparation is described as well as ITO-MgF2 film deposition equipment, procedures and film characterization. Durability testing methods are also described. The pre- and post-test condition of the films is assessed visually, microscopically, and electrically. Results show that at 500 ITO - 9 vol% MgF2 film is suitable to protect polymer surfaces, such as those used in space-inflatable structures of the PowerSphere microsatellite concept, during a 1-year Earth orbiting mission. Future plans for ground-based and orbital testing of this film are also discussed. Kerslake, Thomas W. and Waters, Deborah L. and Schieman, David A. and Hambourger, Paul D. Glenn Research Center NASA/TM-2003-212512, E-14072, NAS 1.15:212512, AIAA Paper 2003-5919
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721590322
Category :
Languages : en
Pages : 28
Get Book Here
Book Description
This paper presents results from ITO-MgF2 film durability evaluations that included tape peel, fold, thermal cycle, and AO exposure testing. Polymer coupon preparation is described as well as ITO-MgF2 film deposition equipment, procedures and film characterization. Durability testing methods are also described. The pre- and post-test condition of the films is assessed visually, microscopically, and electrically. Results show that at 500 ITO - 9 vol% MgF2 film is suitable to protect polymer surfaces, such as those used in space-inflatable structures of the PowerSphere microsatellite concept, during a 1-year Earth orbiting mission. Future plans for ground-based and orbital testing of this film are also discussed. Kerslake, Thomas W. and Waters, Deborah L. and Schieman, David A. and Hambourger, Paul D. Glenn Research Center NASA/TM-2003-212512, E-14072, NAS 1.15:212512, AIAA Paper 2003-5919
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721678297
Category :
Languages : en
Pages : 32
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Book Description
Multi-kilogram class microsatellites with a PowerSphere electric power system are attractive for fulfilling a variety of potential NASA missions. However, PowerSphere polymer surfaces must be coated with a film that has suitable electrical sheet resistivity for electrostatic discharge control, be resistant to atomic oxygen attack, be transparent to ultraviolet light for composite structure curing and resist ultraviolet light induced darkening for efficient photovoltaic cell operation. In addition, the film must be tolerant of polymer layer folding associated with launch stowage of PowerSphere inflatable structures. An excellent film material candidate to meet these requirements is co-sputtered, indium oxide (In2O3) - tin oxide (SnO2), known as 'ITO', and magnesium fluoride (MgF2). While basic ITO-MgF2 film properties have been the subject of research over the last decade, further research is required in the areas of film durability for space-inflatable applications and precise film property control for large scale commercial production. In this paper, the authors present film durability results for a folded polymer substrate and film resistance to vacuum UV darkening. The authors discuss methods and results in the area of film sheet resistivity measurement and active control, particularly dual-channel, plasma emission line measurement of ITO and MgF2 plasma sources. ITO-MgF2 film polymer coupon preparation is described as well as film deposition equipment, procedures and film characterization. Durability testing methods are also described. The pre- and post-test condition of the films is assessed microscopically and electrically. Results show that an approx. 500A ITO-18vol% MgF2 film is a promising candidate to protect PowerSphere polymer surfaces for Earth orbit missions. Preliminary data also indicate that in situ film measurement methods are promising for active film resistivity control in future large scale production. Future film research plans are also discuss
Author: Minoru Taya
Publisher: Cambridge University Press
ISBN: 1107065380
Category : Medical
Languages : en
Pages : 539
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Book Description
From experts in engineering and biology, this is the first book to integrate sensor and actuator technology with bioinspired design.
Author:
Publisher:
ISBN:
Category : Large space structures (Astronautics)
Languages : en
Pages : 1042
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Book Description
Author: Jacob Kleiman
Publisher: Springer Science & Business Media
ISBN: 3642302297
Category : Technology & Engineering
Languages : en
Pages : 606
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Book Description
The goals of the 10th International Space Conference on “Protection of Materials and Structures from Space Environment” ICPMSE-10J, since its inception in 1992, have been to facilitate exchanges between members of the various engineering and science disciplines involved in the development of space materials, including aspects of LEO, GEO and Deep Space environments, ground-based qualification, and in-flight experiments and lessons learned from operational vehicles that are closely interrelated to disciplines of the atmospheric sciences, solar-terrestrial interactions and space life sciences. The knowledge of environmental conditions on and around the Moon, Mars, Venus and the low Earth orbit as well as other possible candidates for landing such as asteroids have become an important issue, and protecting both hardware and human life from the effects of space environments has taken on a new meaning in light of the increased interest in space travel and colonization of other planets. And while many material experiments have been carried out on the ground and in open space in the last 50 years (LDEF, MEEP, SARE, MISSE, AOP, DSPSE, ESEM, EURECA, HST, MDIM, MIS, MPID, MPAC and SEED), many questions regarding the environmental impact of space on materials remain either poorly understood or unanswered. The coming generations of scientists will have to continue this work and tackle new challenges, continuing to build the level of confidence humans will need to continue the colonization of space. It is hoped that the proceedings of the ICPMSE-10J presented in this book will constitute a small contribution to doing so.
Author: William A. Imbriale
Publisher: John Wiley & Sons
ISBN: 1119993199
Category : Technology & Engineering
Languages : en
Pages : 772
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Book Description
This book addresses a broad range of topics on antennas for space applications. First, it introduces the fundamental methodologies of space antenna design, modelling and analysis as well as the state-of-the-art and anticipated future technological developments. Each of the topics discussed are specialized and contextualized to the space sector. Furthermore, case studies are also provided to demonstrate the design and implementation of antennas in actual applications. Second, the authors present a detailed review of antenna designs for some popular applications such as satellite communications, space-borne synthetic aperture radar (SAR), Global Navigation Satellite Systems (GNSS) receivers, science instruments, radio astronomy, small satellites, and deep-space applications. Finally it presents the reader with a comprehensive path from space antenna development basics to specific individual applications. Key Features: Presents a detailed review of antenna designs for applications such as satellite communications, space-borne SAR, GNSS receivers, science instruments, small satellites, radio astronomy, deep-space applications Addresses the space antenna development from different angles, including electromagnetic, thermal and mechanical design strategies required for space qualification Includes numerous case studies to demonstrate how to design and implement antennas in practical scenarios Offers both an introduction for students in the field and an in-depth reference for antenna engineers who develop space antennas This book serves as an excellent reference for researchers, professionals and graduate students in the fields of antennas and propagation, electromagnetics, RF/microwave/millimetrewave systems, satellite communications, radars, satellite remote sensing, satellite navigation and spacecraft system engineering, It also aids engineers technical managers and professionals working on antenna and RF designs. Marketing and business people in satellites, wireless, and electronics area who want to acquire a basic understanding of the technology will also find this book of interest.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 296
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Author: Ron Westrum
Publisher: Naval Institute Press
ISBN: 1612513638
Category : History
Languages : en
Pages : 282
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Book Description
In the mid-1950s a small group of overworked, underpaid scientists and engineers on a remote base in the Mojave Desert developed a weapon no one had asked for but everyone in the weapons industry desired. This is the story of how that unorthodox team, led by visionary Bill McLean, overcame U.S. Navy bureaucracy and other more heavily funded projects to develop the world’s best air-to-air missile. Author Ron Westrum examines that special time and place—when the old American work ethic and “can do” spirit were a vital part of U.S. weapons development—to discover how this dedicated team was able to create a simple and inexpensive missile. Today, many decades after its invention, the Sidewinder missile is still considered one of the best that America has to offer. In a time of billion-dollar weapons development contracts, astronomical cost overruns, and defense acquisitions scandals, this revealing, highly readable tale about one of the most successful weapons in history should be of interest to anyone concerned with national security."=
Author: N. K. Bansal
Publisher:
ISBN: 9780074600238
Category : Direct energy conversion
Languages : en
Pages : 454
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