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The effects of energetic proton bombardment on polymeric materials

# The effects of energetic proton bombardment on polymeric materials

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The Physical Object ID Numbers Statement Daniel R. Coulter ... [et al.] Series NASA contractor report -- NASA CR-177161 Contributions Coulter, Daniel R, Jet Propulsion Laboratory (U.S.) Format Microform Pagination 1 v Open Library OL14985405M

It will aim, in particular, at identifying open physics issues and gaps associated with energetic particles in ITER and future fusion power plants. Topics. The meeting will cover the following topics. 1. Alpha particles physics; 2. Transport of energetic particles; 3. Effects of energetic particles in magnetic confinement fusion devices; 4. Analysis of ITER Materials and Technologies December The Gateway Hotel Ummed Ahmedabad Ahmedabad, India. 2 Topics I. Alpha Particles Physics II. Transport of Energetic Particles III. Effects of Energetic Particles in Magnetic Confinement Fusion Devices IV. Collective Phenomena: Alfvén Eigenmodes, Energetic Particle modes and Others. Using rf magnetron sputtering, we have identified conditions for growing indium tin oxide (ITO) thin films at room temperature that simultaneously exhibit low resistivity (∼3×10−4 Ω cm), high optical transparency (>80%), and near-zero stress on polyester substrates. From transport measurements, we deduced that Sn donor atoms had little effect on electrical conduction in Cited by: Materials and engineering catalogue details all new titles and complete backlist titles available.

The Advantages and Shortcomings of Using Nano-sized Energetic Materials into Al(OH) 3. Since this conversion leads to a deterioration of the protective surface, the permeability of the structure increases. A result of this process is an undesirable increase in the burn rate which will occur during storage of these propellants.

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### The effects of energetic proton bombardment on polymeric materials Download PDF EPUB FB2

The effects of energetic proton bombardment on polymeric materials: experimental studies and degradation models. In Fig. 2, Fig. 3 are presented the RGA results for the gases emitted simultaneously with the bombardment of the films.

The emission during the bombardment indicates that bounds in the polymeric chains were broken, resulting The effects of energetic proton bombardment on polymeric materials book modifications in the polymers.

The CF 3 radicals account for the greater part of partial pressure detected during Cited by: EFFECTS ON MATERIALS 1. INTRODUCTION Space vehicles are subject to bombardment by nuclear particles and electromagnetic radiations from both external and onboard sources.

During some missions, radiation exposure may be sufficient to degrade the critical properties of structural materials and jeopardize flightworthiness of the Size: 1MB. Polymers for Advanced Technologies Volume 5, pp. Energetic Polymers as Binders in Composite Propellants and Explosives M.

Eamon Colclough’, Hesmant Desai’, Ross W. Mi Malcolm J. Stewart2 and Peter Golding3 I DRA, Fort Halstead, Sevenoaks 7”14 7BP, UK DRA Farnborough, Farnborough GU14 6TD, UK AWE, Aldermaston RG7 4PR, UK ABSTRACT The.

D.R. Coulter, The effects of energetic proton bombardment on polymeric materials book of Energetic Proton bombardment on Polymeric materials: Experimental studies and degradation models” NASA-CR, () Google Scholar E.A. by: 2. Pulsed powering of a magnetron discharge in the medium frequency range (20– kilocycle) is the basis for a long-term stable run of reactive deposition processes at high deposition rates.

Recent investigations indicated another important feature of pulsed powering, which is increased energetic particle bombardment of the by: highly insulating spacecraft polymers were exposed to energetic protons with energies from 1 MeV to 10 The effects of energetic proton bombardment on polymeric materials book to simulate protons from the solar wind and from solar energetic proton events.

Results indicate that effects in proton charged dielectrics are distinctly different than those observed due to electron charging. bombardment, meaning that the dark current decay time is much longer than the duration of charging.

Using Gauss’ aw l and the generalized breakdown field strength of 7. V/m. Deep Dielectric Charging Of Spacecraft Polymers by Energetic Protons. Cited by: Polymeric materials are highly radiation sensitive and their properties can be modified by exposing the material to different ions and radiation such.

increase the performance of future The effects of energetic proton bombardment on polymeric materials book materials are ADN, TNAZ and CL The energy content of FOX-7 is comparable to that of RDX; however, it is sig-nificantly less sensitive and therefore a promising material for further development.

Except for NC-based formulations, polymeric binders are used as the matrix of energetic materials. Advanced energetic materials—explosive fill and propellants—are a critical technology for national security. While several new promising concepts and formulations have emerged in recent years, the Department of Defense is concerned about the nation’s ability to maintain and improve the knowledge base in this area.

Here, b is the full width at half maximum (FWHM) of the XRD peak (in radian), $$\lambda$$ is the wavelength of the X-rays used ( Å in most of the cases for Cu K α radiation), and θ is the angle which is calculated by taking $$\frac{1}{2}$$ of 2θ value in above equation.

k is a constant of proportionality (called the Scherrer constant), and its value depends on how the Author: Paramjit Singh, Rajesh Kumar, Rajesh Kumar. The Journal of Energetic Materials fills the need for an international forum of scientific and technical interchange in the disciplines of explosives, propellants, and pyrotechnics.

It is a. Recent Trends in Radiation Polymer Chemistry (Advances in Polymer Science ()) [Okamura, Seizo] on *FREE* shipping on qualifying offers. Recent Trends in Radiation Polymer Chemistry (Advances in Polymer Science ())Cited by: 1. Polymer Electrolyte Fuel Cells: Physical Principles of Materials and Operation - Kindle edition by Eikerling, Michael, Kulikovsky, Andrei.

Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Polymer Electrolyte Fuel Cells: Physical Principles of Materials and cturer: CRC Press.

intensity of diverse spacecraft materials exposed to energetic electron bombardment in both the space environment and space simulation studies. This is the focus of this paper. We present results of ground-based measurements simulating space-induced cathodoluminescence from a.

Low secondary ion yields from organic and biological molecules are the principal limitation on the future exploitation of time of flight-secondary ion mass spectrometry (TOF-SIMS) as a surface and materials analysis technique.

On the basis of the hypothesis that increasing the density of water related fragments in the ion impact zone would enhance proton mediated reactions, a Cited by: effects of radiation depend on the energy dose deposited rather than on the speciﬁc nature of the ionizing agent (Gerakines & Hudson ).

Therefore the effects of cosmic rays on matter can also be studied using energetic electrons instead of protons (see for instance Kaiser et al.

; Mason et al. and references cited therein).Cited by: 7. The Mechanism of Filler Reinforcement from addition of neutral polymeric bonding agents to energetic polar propellants.

Authors. Sue Kim, Chemistry Department, California State University, Sacramento, CA (USA) Search for more papers by this author. Paul N. Noble. Radiation-Induced Effects in Ethylene—Propylene Copolymer with Antioxidant Stefania Baccaro Chap DOI: /bkch Publication Date (Print): May 5, as a function of bombardment.

Moreover, most studies even ignore the role of highly energetic negatively charged oxygen ions. Although the marked inﬂuence of negative oxygen ion bombardment inherent in the sputter discharge has been shown already for a variety of materials (cf, e.g., [38–43]).

Time-domain and energetic bombardment effects on the nucleation and coalescence of thin metal films on amorphous substrates Daniel Magnfält, Viktor Elofsson, G Abadias, Ulf Helmersson and Kostas Sarakinos Linköping University Post Print N.B.: When citing this work, cite the original article.

Original Publication. PROPERTIES OF ULTRAFINE ENERGETIC MATERIALS M.J. Gifford, M.W. Greenaway, W.G. Proud & J.E. Field 3 STUDIES ON LOW VULNERABLE HIGH EXPLOSIVES Huang Hui, Dong Haishan 12 PREPARING ULTRA-FINE HMX PARTICLES BY GAS PROCESS Wang Baomin,Zhang Jinglin 19 COMPARISON OF INCREMENTAL PRESSING WITH SINGLE File Size: KB.

of conventional energetic materials in various applications. Keywords: nano-aluminum, materials, thermites, energetic materials Introduction Research into nanothermites is a current hot topic in the field of energetic materials.

Energetic materials Cited by:   Energetic Polymers and Plasticisers for Explosive Formulations - A Review of Recent Advances Executive Summary In an effort to comply with Insensitive Munitions (IM) criteria, energetic binders comprising polymer and plasticiser(s) are being used in cast-cured polymer bonded explosives and cast composite rocket propellants.

This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers. ===== A direct consequence of the decrease in beam energy, E 0 is the correlated decrease in the penetration depth, R, of primary electrons (PE) interacting with the specimen.

The basis of. Pt/Co multilayers are an attractive candidate for a magneto‐optical recording medium. However, films sputter deposited in Ar have coercivities too small (– Oe) to be practical in recording.

By sputter depositing multilayers in Kr or Xe instead of Ar, we achieved coercivities ∼ Oe, suitable for recording. We attribute the lower coercivity of Ar‐sputtered films to interfacial Cited by:   Materials science. Breakthrough for protons. on either side of the materials, showing that the proton conductivity was a general effect.

Energetic materials (EMs) have long been utilized for a variety of military, aerospace, commercial and oil and gas applications. While legacy materials deliver specific and established properties, there are circumstances and applications that demand new or customized EMs.

Atomic collision-induced etching of polymeric materials in a hyperthermal energy range relevance to material degradation in space Kumiko Yokota, Yusuke Fujimoto, Ryota Okura, Kazuki Kita, Masahito Tagawa Graduate School of Engineering, Kobe University, KobeJapan. NANO ENGINEERED ENERGETIC MATERIALS MURI Richard A.

Yetter The Pennsylvania State University Workshop on NanoEnergetics at Rutgers Rutgers University, Busch Campus, Biomedical Engineering Building Taylor Road,Piscataway, NJ 28 February Synthesis & Assembly Theoretical Modeling & Simulation Experimental Characterization File Size: 3MB.

There are various fabrication methods for synthesizing nanostructures, among which plasma-based technology is strongly competitive in terms of its flexibility and friendly uses, economy, and safety.

This review systematically discusses plasma techniques and the detailed interactions of charged particles, radicals, and electrons with substrate materials of, in particular, polymers for Cited by: The book also offers new insights into "green" chemistry requirements and strategies for military applications.

This work should be of interest to advanced students in chemistry, materials science and engineering, as well as all those working indefense technology. ADVERTISEMENTS: Read this article to learn about the effects of radiation on human body.

Introduction: Radiation exists in the environment as a normal component of nature. It comes from both natural and manmade sources. It is emitted by sun, the radioactive material in earth, outer space, food, rocks and even the human body. Radiation comes [ ]. Classical energetic materials, i.e., explosives, propellants and pyrotechnics are a class of material with a high amount of stored chemical energy that can be released during rapid exothermic reaction For example, explosives are usually generated by combining fuel and oxidizer groups into one molecule.

The energy density of those materials is very by: 2. a particle that has the same mass as an electron but has a positive charge and is emitted from the nucleus during some kinds of radioactive decay (when proton converted into neutron) electron capture an inner orbital electron is captured by the nucleus of its own atom.

negative effects of space environment is the mass loss of polymeric composites (PC) being the spacecraft thermal control coatings, due to the outgassing and sublimation processes. Rates of the processes are mainly defined by solar and low-energy ionizing radiations that produce principal contribution to near-surface absorbed Size: KB.

Military Energetic Materials: Explosives and Propellants fuzes, flares, grenades, practice munitions, blanks, fireworks, signals, and specialized quarry Size: KB. previous theories of proton precipitation in the outer RB.

It is found that the presence of SAW with nT amplitude is consistent with lifetimes of the order of days and results in the observed low trapped energetic proton flux for L > 2, in agreement with earlier estimates [Dragt, ].

In section 6, these results are applied to the inner. Neutron decays into a proton, electron and neutrino -Daughter nucleus ends up with one more proton and one less neutron (different chemical element)-Beta decay is caused by the weak force (allowing us to tear the nucleus apart).

Full text of "Chemistry of Energetic Materials (Miller)" See other formats.Rajagopalan Thiruvengadathan, Aluminum-Based Nano-energetic Materials: State of the Art and Future Perspectives, Nano-Energetic Materials, /_2, (), ().

Crossref Yanjun Yin and Xueming Li, Al/CuO composite coatings with nanorods structure assembled by electrophoretic deposition for enhancing energy released.

Bombardment of a silica‐soda‐lime glass (nD=) by more than 5× A+ ions/cm2 with an energy of kev reduces ebook reflection ebook to of its normal value for light of wavelength λ= μ. The change in reflection coefficient is attributed to the formation of an altered glass layer.

For a bombardment by 40‐kev A+ ions, the layer has a thickness of Cited by: