Hydrogen Recycling at Plasma Facing Materials

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Publisher : Springer Science & Business Media
ISBN 13 : 9401143315
Total Pages : 351 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Hydrogen Recycling at Plasma Facing Materials by : C.H. Wu

Download or read book Hydrogen Recycling at Plasma Facing Materials written by C.H. Wu and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important issues in the construction of future magnetic confinement fusion machines is that of the materials of which they are constructed, and one of the key points of proper material choice is the recycle of hydrogen isotopes with materials at the plasma face. Tritium machines demand high safety and economy, which in turn requires the lowest possible T inventory and smallest possible permeation through the plasma facing materials. The recycle behaviour of the in-vessel components must also be known if the plasma reaction is to predictable and controllable, and finally, the fuel cycle and plasma operating regimes may be actively controlled by special materials and methods. The book discusses both laboratory experiments exploring the basic properties of non-equilibrium hydrogen-solid systems (diffusion, absorption, boundary processes) and experimental results obtained from existing fusion machines under conditions simulating future situations to some extent. Contributions are from experts in the fields of nuclear fusion, materials science, surface science, vacuum science and technology, and solid state physics.

Hydrogen and Helium Recycling at Plasma Facing Materials

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Publisher : Springer Science & Business Media
ISBN 13 : 9401004447
Total Pages : 237 pages
Book Rating : 4.4/5 (1 download)

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Book Synopsis Hydrogen and Helium Recycling at Plasma Facing Materials by : Ahmed Hassanein

Download or read book Hydrogen and Helium Recycling at Plasma Facing Materials written by Ahmed Hassanein and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compendium representing the current state of the art in the modelling, simulation and physics of the interaction of hydrogen and helium with plasma facing materials in fusion reactors. This is the topic that will determine the success of the production of energy by future Tokamak reactors and it is here discussed by the world's experts. Topics covered are recycling of hydrogen isotopes; wall fuelling and wall pumping; active control of hydrogen recycling; hydrogen and helium behaviour in solids and liquid metals; and databases for recycling.

Proceedings of the International Workshop on Hydrogen Recycle at Plasma Facing Materials, Tokyo, Japan, October 15-16, 1998

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Publisher :
ISBN 13 :
Total Pages : 193 pages
Book Rating : 4.:/5 (129 download)

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Book Synopsis Proceedings of the International Workshop on Hydrogen Recycle at Plasma Facing Materials, Tokyo, Japan, October 15-16, 1998 by :

Download or read book Proceedings of the International Workshop on Hydrogen Recycle at Plasma Facing Materials, Tokyo, Japan, October 15-16, 1998 written by and published by . This book was released on 1998 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Proceedings of the International Workshop on Hydrogen Recycle at Plasma Facing Materiails [i.e. Materials] ; Tokyo, Japan, October 15 - 16, 1998

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Publisher :
ISBN 13 :
Total Pages : 193 pages
Book Rating : 4.:/5 (248 download)

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Book Synopsis Proceedings of the International Workshop on Hydrogen Recycle at Plasma Facing Materiails [i.e. Materials] ; Tokyo, Japan, October 15 - 16, 1998 by : International Workshop on Hydrogen Recycle at Plasma Facing Materials

Download or read book Proceedings of the International Workshop on Hydrogen Recycle at Plasma Facing Materiails [i.e. Materials] ; Tokyo, Japan, October 15 - 16, 1998 written by International Workshop on Hydrogen Recycle at Plasma Facing Materials and published by . This book was released on 1998 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Plasma-Material Interactions in a Controlled Fusion Reactor

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Author :
Publisher : Springer Nature
ISBN 13 : 9811603286
Total Pages : 209 pages
Book Rating : 4.8/5 (116 download)

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Book Synopsis Plasma-Material Interactions in a Controlled Fusion Reactor by : Tetsuo Tanabe

Download or read book Plasma-Material Interactions in a Controlled Fusion Reactor written by Tetsuo Tanabe and published by Springer Nature. This book was released on 2021-03-08 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a primer on the interplay between plasma and materials in a fusion reactor, so-called plasma–materials interactions (PMIs), highlighting materials and their influence on plasma through PMI. It aims to demonstrate that a plasma-facing surface (PFS) responds actively to fusion plasma and that the clarifying nature of PFS is indispensable to understanding the influence of PFS on plasma. It describes the modern insight into PMI, namely, relevant feedback to plasma performance from plasma-facing material (PFM) on changes in a material surface by plasma power load by radiation and particles, contrary to a conventional view that unilateral influence from plasma on PFM is dominant in PMI. There are many books and reviews on PMI in the context of plasma physics, that is, how plasma or plasma confinement works in PMI. By contrast, this book features a materials aspect in PMI focusing on changes caused by heat and particle load from plasma: how PFMs are changed by plasma exposure and then, accordingly, how the changed PFM interacts with plasma.

Tritium: Fuel of Fusion Reactors

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Publisher : Springer
ISBN 13 : 4431564608
Total Pages : 365 pages
Book Rating : 4.4/5 (315 download)

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Book Synopsis Tritium: Fuel of Fusion Reactors by : Tetsuo Tanabe

Download or read book Tritium: Fuel of Fusion Reactors written by Tetsuo Tanabe and published by Springer. This book was released on 2016-12-05 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on tritium as a fuel for fusion reactors and a next-generation energy source. Following an introduction of tritium as a hydrogen radioisotope, important issues involved in establishing safe and economical tritium fuel cycles including breeding for a fusion reactor are summarized; these include the handling of large amounts of tritium: confinement, leakage, contamination, permeation, regulation and tritium accountancy, and impacts on surrounding areas. Targeting and encouraging the students and technicians who will design and operate fusion reactors in the near future, this book offers a valuable resource on tritium science and technology.

Nonporous Inorganic Membranes

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Publisher : John Wiley & Sons
ISBN 13 : 3527608583
Total Pages : 291 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Nonporous Inorganic Membranes by : Anthony F. Sammells

Download or read book Nonporous Inorganic Membranes written by Anthony F. Sammells and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference book addresses the evolution of materials for both oxygen and hydrogen transport membranes and offers strategies for their fabrication as well as their subsequent incorporation into catalytic membrane reactors. Other chapters deal with, e.g., engineering design and scale-up issues, strategies for preparation of supported thin-film membranes, or interfacial kinetic and mass transfer issues. A must for materials scientists, chemists, chemical engineers and electrochemists interested in advanced chemical processing.

Nuclear Fusion Research

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Publisher : Springer Science & Business Media
ISBN 13 : 354027362X
Total Pages : 467 pages
Book Rating : 4.5/5 (42 download)

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Book Synopsis Nuclear Fusion Research by : Robert E. H. Clark

Download or read book Nuclear Fusion Research written by Robert E. H. Clark and published by Springer Science & Business Media. This book was released on 2006-01-20 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: It became clear in the early days of fusion research that the effects of the containment vessel (erosion of "impurities") degrade the overall fusion plasma performance. Progress in controlled nuclear fusion research over the last decade has led to magnetically confined plasmas that, in turn, are sufficiently powerful to damage the vessel structures over its lifetime. This book reviews current understanding and concepts to deal with this remaining critical design issue for fusion reactors. It reviews both progress and open questions, largely in terms of available and sought-after plasma-surface interaction data and atomic/molecular data related to these "plasma edge" issues.

Advances in SiC / SiC Ceramic Composites

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Publisher : John Wiley & Sons
ISBN 13 : 1118406028
Total Pages : 400 pages
Book Rating : 4.1/5 (184 download)

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Book Synopsis Advances in SiC / SiC Ceramic Composites by : Akira Kohyama

Download or read book Advances in SiC / SiC Ceramic Composites written by Akira Kohyama and published by John Wiley & Sons. This book was released on 2012-04-11 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This transactions volume contains 33 papers from the CREST International Symposium on SiC/SiC Composite Materials Research and Development and Its Application to Advanced Energy Systems held May 20-22, 2002 in Kyoto, Japan. Chapters include Processing for SiC/SiC Composites; Processing for SiC/SiC Composite Constituent; Characterization of Thermomechanical Performance; and Joining Technologies for Advanced Energy Applications. 373 pages.

Modeling of Hydrogen Isotopes Retention in Plasma-facing Components for Fusion Applications

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Publisher :
ISBN 13 : 9781321870558
Total Pages : 119 pages
Book Rating : 4.8/5 (75 download)

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Book Synopsis Modeling of Hydrogen Isotopes Retention in Plasma-facing Components for Fusion Applications by : Jérom̂e Guterl

Download or read book Modeling of Hydrogen Isotopes Retention in Plasma-facing Components for Fusion Applications written by Jérom̂e Guterl and published by . This book was released on 2015 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma-material interactions might strongly affect plasma performances and life-time of future magnetic fusion devices. For example, retention and recycling of hydrogen isotopes in plasma-facing components (PFC) may lead to dynamics plasma-material interactions and significant accumulation of tritium in material. Understanding the multifaceted physics of hydrogen retention in PFC is thus crucial, but remains challenging due to the wide spectrum of retention processes on PFC surface (erosion, co-deposition, etc.) and in PFC bulk (trap sites, bubbles, etc.) induced by long-time exposure of PFC to high flux of energy and particles. In this context, we revisit in this work some aspects of the reaction-diffusion models used to describe retention of hydrogen implanted in material in fusion relevant. We first focus on the analysis of thermal desorption spectroscopy (TDS) experiments, showing that the evolution of hydrogen concentration in material during TDS experiments is usually quasi-static. An analytic description of thermal desorption spectra (TDSP) is then obtained in quasi-static regime and is used to highlight dependencies of TDSP on hydrogen retention parameters. The interpretation of Arrhenius plots to characterize hydrogen retention processes is then revisited. Moreover, it is shown that retention processes can be characterized using the shape of desorption peaks in TDSP, and that long desorption tails in TDSP can be used to estimate activation energy of diffusion of hydrogen in PFC. Hydrogen retention induced by a large number of different types of traps is examined next. A reaction-diffusion model of TDSP with a large number of types of traps is presented for the first time. The application of this model is illustrated on several experimental TDSP available in literature, which are consistently reproduced using several types of traps with a unique broad spectrum of detrapping energies. The values of these detrapping energies are shown to be in agreement with values predicted by density functional theory simulations when several hydrogen atoms are trapped in one material vacancy. Effects of surface processes on hydrogen retention and recycling are investigated in the second part. First, long-term outgassing of hydrogen from PFC during off-plasma events is considered. The super-diffusive power-law decay in time of the hydrogen outgassing flux is modeled with a revisited single trap reaction-diffusion model, showing that hydrogen outgassing is either surface-limited or diffusion-limited. The outgassing regime is shown to be governed either by processes in the bulk or on the surface of material. The influence of hydrogen concentration profiles in material on the power-law exponents is analyzed as well. Finally, the different models proposed in the literature to describe power-law decays of hydrogen outgassing flux experimentally observed during off-plasma events are reconciled. Hydrogen recombination and desorption on tungsten surface is investigated next using molecular dynamics (MD) and accelerated molecular dynamics simulations. Adsorption states, diffusion, hydrogen recombination into molecules, and clustering of hydrogen on tungsten surfaces are analyzed. It is shown that tungsten hydrogen interatomic potential, available in literature and used in MD simulations, cannot reproduce main features of hydrogen molecular recombination on tungsten surface. Hydrogen clustering on tungsten surface is nevertheless observed during MD simulations. Effects of hydrogen clustering on hydrogen desorption are thus analyzed by introducing a kinetic model describing the competition between surface diffusion, clustering and recombination. Different desorption regimes are identified, which reproduce some aspects of desorption regimes experimentally observed when tungsten surface is saturated with hydrogen.

Fusion Technology 1990

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Publisher : Elsevier
ISBN 13 : 0444600655
Total Pages : 1039 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Fusion Technology 1990 by : B.E. Keen

Download or read book Fusion Technology 1990 written by B.E. Keen and published by Elsevier. This book was released on 2012-12-02 with total page 1039 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the biennial series of symposia on Fusion Technology, organized by the European Fusion Laboratories, is the exchange of information on the design, construction and operation of fusion experiments. The coverage of the volume includes the technology aspects of fusion reactors to provide a link to the technology of new developments and form a guideline for the definition of future work. These proceedings comprise two volumes and contain both the invited lectures and contributed papers presented at the Symposium, which was attended by 556 participants from around the globe. The 312 papers in this volume, including 17 invited papers, give a broad and current overview of the progress and trends fusion technology is experiencing now, and the future for fusion devices.

Boron Rich Solids

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Publisher : Springer Science & Business Media
ISBN 13 : 9048198232
Total Pages : 339 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Boron Rich Solids by : Nina Orlovskaya

Download or read book Boron Rich Solids written by Nina Orlovskaya and published by Springer Science & Business Media. This book was released on 2010-10-07 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this book is to discuss the current status of research and development of boron-rich solids as sensors, ultra-high temperature ceramics, thermoelectrics, and armor. Novel biological and chemical sensors made of stiff and light-weight boron-rich solids are very exciting and efficient for applications in medical diagnoses, environmental surveillance and the detection of pathogen and biological/chemical terrorism agents. Ultra-high temperature ceramic composites exhibit excellent oxidation and corrosion resistance for hypersonic vehicle applications. Boron-rich solids are also promising candidates for high-temperature thermoelectric conversion. Armor is another very important application of boron-rich solids, since most of them exhibit very high hardness, which makes them perfect candidates with high resistance to ballistic impact. The following topical areas are presented: •Boron-rich solids: science and technology •Synthesis and sintering strategies of boron rich solids •Microcantilever sensors •Screening of the possible boron-based thermoelectric conversion materials; •Ultra-high temperature ZrB2 and HfB2 based composites •Magnetic, transport and high-pressure properties of boron-rich solids •Restrictions of the sensor dimensions for chemical detection •Armor

Atomic and Plasma-material Interaction Data for Fusion

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Publisher :
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Atomic and Plasma-material Interaction Data for Fusion by :

Download or read book Atomic and Plasma-material Interaction Data for Fusion written by and published by . This book was released on 2003 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Hydrogen as a Future Energy Carrier

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Publisher : John Wiley & Sons
ISBN 13 : 352762290X
Total Pages : 441 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Hydrogen as a Future Energy Carrier by : Andreas Züttel

Download or read book Hydrogen as a Future Energy Carrier written by Andreas Züttel and published by John Wiley & Sons. This book was released on 2011-09-22 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book fills the gap for concise but comprehensive literature on this interdisciplinary topic, involving chemical, physical, biological and engineering challenges. It provides broad coverage of the most important fields of modern hydrogen technology: hydrogen properties, production, storage, conversion to power, and applications in materials science. In so doing, the book covers all the pertinent materials classes: metal hydrides, inorganic porous solids, organic materials, and nanotubes. The authors present the entire view from fundamental research to viable devices and systems, including the latest scientific results and discoveries, practical approaches to design and engineering, as well as functioning prototypes and advanced systems.

Materials Transactions, JIM.

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Publisher :
ISBN 13 :
Total Pages : 714 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Materials Transactions, JIM. by :

Download or read book Materials Transactions, JIM. written by and published by . This book was released on 1993-07 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt:

US-Japan Workshop on "Physics Issues for Steady-state Tokamaks"

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Publisher :
ISBN 13 :
Total Pages : 308 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis US-Japan Workshop on "Physics Issues for Steady-state Tokamaks" by :

Download or read book US-Japan Workshop on "Physics Issues for Steady-state Tokamaks" written by and published by . This book was released on 1993 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

New Developments in Nuclear Fusion Research

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Publisher : Nova Publishers
ISBN 13 : 9781594544866
Total Pages : 294 pages
Book Rating : 4.5/5 (448 download)

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Book Synopsis New Developments in Nuclear Fusion Research by : Y. Nakamura

Download or read book New Developments in Nuclear Fusion Research written by Y. Nakamura and published by Nova Publishers. This book was released on 2006 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear fusion is a process in which two nuclei join, forming a larger nucleus and releasing or absorbing energy. With some exceptions, nuclei lighter than iron release energy when they fuse, while heavier nuclei absorb energy; this is because iron has the largest binding energy. Nuclear fusion of light elements is the energy source which causes stars to shine and hydrogen bombs to explode. Nuclear fusion of heavy elements is part of the process that triggers supernovae. Nuclear fusion as an energy source has several advantages: It is vast, new source of energy; Fuels are plentiful; Inherently safe since any malfunction results in a rapid shutdown; No atmospheric pollution leading to acid rain or "greenhouse" effect; Radioactivity of the reactor structure, caused by the neutrons, decays rapidly and can be minimised by careful selection of low-activation materials. Provision for geological time-span disposal is not needed. This book brings together leading research in this field which will play a major role in the 21st century.