Relevant bibliographies by topics / Lasers in controlled fusion

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Lasers in controlled fusion'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Lasers in controlled fusion"

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Freeman, R. R., C. Anderson, J. M. Hill, J. King, R. Snavely, S. Hatchett, M. Key, et al. "High-intensity lasers and controlled fusion." European Physical Journal D - Atomic, Molecular and Optical Physics 26, no. 1 (September 1, 2003): 73–77. http://dx.doi.org/10.1140/epjd/e2003-00246-x.

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Wong, H., K. Dawson, G. A. Ravi, L. Howlett, R. O. Jones, and C. J. Sutcliffe. "Multi-Laser Powder Bed Fusion Benchmarking—Initial Trials with Inconel 625." International Journal of Advanced Manufacturing Technology 105, no. 7-8 (November 9, 2019): 2891–906. http://dx.doi.org/10.1007/s00170-019-04417-3.

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Abstract Production rate is an increasingly important factor in the deployment of metal additive manufacturing (AM) throughout industry. To address the perceived low production rate of metal AM systems based on single-laser powder bed fusion (L-PBF), several companies now offer systems in which melting has been parallelised by the introduction of multiple, independently controlled laser beams. Nevertheless, a full set of studies is yet to be conducted to benchmark the efficiency of multi-laser systems and, at the same time, to verify if the mechanical properties of components are compromised due to the increase in build rate. This study addresses the described technology gaps and presents a 4-beam L-PBF system operating in “single multi” (SM) mode (SM-L-PBF) where each of the four lasers is controlled so that it melts all of a particular components’ layers and produces specimens for comparison with standard L-PBF specimens from the same machine. That is all four lasers making all of some of the parts were compared to a single-laser manufacturing all of the parts. Build parameters were kept constant throughout the manufacturing process and the material used was Inconel 625 (IN625). Stress-relieving heat treatment was conducted on As-built (AB) specimens. Both AB and heat-treated (HT) specimen sets were tested for density, microstructure, tensile strength and hardness. Results indicate that the stress-relieving heat treatment increases specimen ductility without compromising other mechanical properties. SM-L-PBF has achieved a build rate of 14 cm3/h when four 200 W lasers were used to process IN625 at a layer thickness of 30 μm. An increase in the build rate of 2.74 times (build time reduction: 63%) has been demonstrated when compared to that of L-PBF, with little to no compromises in specimen mechanical properties. The observed tensile properties exceed the American Society for Testing Materials (ASTM) requirements for IN625 (by a margin of 22 to 26% in the 0.2% offset yield strength). Average specimen hardness and grain size are in the same order as that reported in literatures. The study has demonstrated that a multi-laser AM system opens up opportunities to tackle the impasse of low build rate in L-PBF in an industrial setting and that at least when operating in single mode there is no detectable degradation in the mechanical and crystallographic characteristics of the components produced.
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Atzeni, Stefano. "Light for controlled fusion energy: A perspective on laser-driven inertial fusion." EPL (Europhysics Letters) 109, no. 4 (February 1, 2015): 45001. http://dx.doi.org/10.1209/0295-5075/109/45001.

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DEEBA, FARAH, KAMALUDDIN AHMED, MAHNAZ QADAR HASEEB, and ARSHAD M. MIRZA. "IMPLOSION DYNAMICS OF HIGH-DENSITY FIBER PLASMA DRIVEN BY IMPLODING MULTICASCADE LINER." Modern Physics Letters B 19, no. 22 (September 30, 2005): 1095–105. http://dx.doi.org/10.1142/s0217984905009006.

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The dynamics of a high density D-T fiber plasma driven by a multi cascade system (N multiple shells of finite thicknesses) has been investigated with a view to suppress Rayleigh–Taylor (R–T) instability. Our numerical results show that the plasma parameters of the D-T fiber sensitively depends upon the shell mass ratios and thicknesses. Large values of puff-thickness and mass-ratios provide stabilization against the R–T instability in the final stage of compression but adversely affect fusion conditions. Our analysis, however, suggests that optimum values of the puff-thicknesses and mass ratios are needed to achieve fusion parameters in a multi cascade liner staged Z-pinch devices. The relevance of our present investigation to ultra high magnetic fluxes, X-ray lasers as well as controlled thermonuclear fusion is also pointed out.
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Adhikari, B. R., and R. Khanal. "Introduction to the Plasma State of Matter." Himalayan Physics 4 (December 23, 2013): 60–64. http://dx.doi.org/10.3126/hj.v4i0.9430.

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Plasma is a quasineutral gas of charge and neutral particles which exhibits collective behavior. Because of its distinct behavior it is often termed as the fourth state of matter. It is of interest as it has found applications in diverse areas such as, controlled thermonuclear fusion, gas lasers, lightning, medicine, space science, electronics, etc. In this article we present an introduction to the plasma state of matter and discuss some of its applications.The Himalayan Physics Vol. 4, No. 4, 2013 Page: 60-64 Uploaded date: 12/23/2013
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HORA, HEINRICH. "Developments in inertial fusion energy and beam fusion at magnetic confinement." Laser and Particle Beams 22, no. 4 (October 2004): 439–49. http://dx.doi.org/10.1017/s0263034604223242.

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The 70-year anniversary of the first nuclear fusion reaction of hydrogen isotopes by Oliphant, Harteck, and Rutherford is an opportunity to realize how beam fusion is the path for energy production, including both branches, the magnetic confinement fusion and the inertial fusion energy (IFE). It is intriguing that Oliphant's basic concept for igniting controlled fusion reactions by beams has made a comeback even for magnetic confinement plasma, after this beam fusion concept was revealed by the basically nonlinear processes of the well-known alternative of inertial confinement fusion using laser or particle beams. After reviewing the main streams of both directions some results are reported—as an example of possible alternatives—about how experiments with skin layer interaction and avoiding relativistic self-focusing of clean PW–ps laser pulses for IFE may possibly lead to a simplified fusion reactor scheme without the need for special compression of solid deuterium–tritium fuel.
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Pratama, Ryan Arya, and Akihisa Ohya. "State Estimation and Control of an Unmanned Air Vehicle from a Ground-Based 3D Laser Scanner." Journal of Robotics and Mechatronics 28, no. 6 (December 20, 2016): 878–86. http://dx.doi.org/10.20965/jrm.2016.p0878.

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[abstFig src='/00280006/12.jpg' width='300' text='UAV state estimation from laser scanner' ] In this work, we present a system to estimate the state of and control an Unmanned Air Vehicle (UAV) from a ground-based 3D laser scanner. The main contributions of this work are on data fusion between a low-frequency 3D laser scanner with considerable delay and an on-board 6-DOF IMU, and on automatic position control of a UAV using state estimate obtained from the fusion. We measured laser delay using data from a manually controlled flight. We have devised a method to perform online estimation and compensation of accelerometer offset using delay-corrected laser measurement. We then use the UAV state estimation in a nested controller with a high-frequency velocity control inner loop and a low-frequency position control outer loop. We demonstrated the state estimation and control in a series of experiments on velocity control and position control, including a comparison between position control using fusion data and only laser data.
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Pieruschka, P., L. Cicchitelli, R. Khoda-Bakhsh, E. Kuhn, G. H. Miley, and H. Hora. "Volume ignition of inertial confinement fusion of deuterium-helium(3) and hydrogen-boron(ll) clean fusion fuel." Laser and Particle Beams 10, no. 1 (March 1992): 145–54. http://dx.doi.org/10.1017/s0263034600004274.

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Since DT laser fusion with 10-MJ laser pulses for 1000-MJ output now offers the physics solution for an economical fusion energy reactor, the conditions are evaluated assuming that controlled ICF reactions will become possible in the future using clean nuclear fusion fuel such as deuterium-helium(3) or hydrogen-boron(11). Using the transparent physics mechanisms of volume ignition of the fuel capsules, we show that the volume ignition for strong reduction of the optimum initial temperature can be reached for both types of fuels if a compression about 100 times higher than those in present-day laser compression experiments is attained in the future. Helium(3) laser-pulse energies are then in the same range as for DT, but ten times higher energies will be required for hydrogenboron(11).
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Badziak, J. "Laser nuclear fusion: current status, challenges and prospect." Bulletin of the Polish Academy of Sciences: Technical Sciences 60, no. 4 (December 1, 2012): 729–38. http://dx.doi.org/10.2478/v10175-012-0084-8.

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Abstract In 2009, in Lawrence Livermore National Laboratory, USA, National Ignition Facility (NIF) - the largest thermonuclear fusion device ever made was launched. Its main part is a multi-beam laser whose energy in nanosecond pulse exceeds 1MJ (106 J). Its task is to compress DT fuel to the density over a few thousand times higher than that of solid-state DT and heat it to 100 millions of K degrees. In this case, the process of fuel compression and heating is realized in an indirect way - laser radiation (in UV range) is converted in the so-called hohlraum (1 cm cylinder with a spherical DT pellet inside) into very intense soft X radiation symmetrically illuminating DT pellet. For the first time ever, the fusion device’s energetic parameters are sufficient for the achieving the ignition and self-sustained burn of thermonuclear fuel on a scale allowing for the generation of energy far bigger than that delivered to the fuel. The main purpose of the current experimental campaign on NIF is bringing about, within the next two-three years, a controlled thermonuclear ‘big bang’ in which the fusion energy will exceed the energy delivered by the laser at least ten times. The expected ‘big bang’ would be the culmination of fifty years of international efforts aiming at demonstrating both physical and technical feasibility of generating, in a controlled way, the energy from nuclear fusion in inertial confined plasma and would pave the way for practical realization of the laser-driven thermonuclear reactor. This paper briefly reviews the basic current concepts of laser fusion and main problems and challenges facing the research community dealing with this field. In particular, the conventional, central hot spot ignition approach to laser fusion is discussed together with the more recent ones - fast ignition, shock ignition and impact ignition fusion. The research projects directed towards building an experimental laser-driven thermonuclear reactor are presented as well
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KONG, HONG JIN, JIN WOO YOON, JAE SUNG SHIN, DU HYUN BEAK, and BONG JU LEE. "Long term stabilization of the beam combination laser with a phase controlled stimulated Brillouin scattering phase conjugation mirrors for the laser fusion driver." Laser and Particle Beams 24, no. 4 (October 2006): 519–23. http://dx.doi.org/10.1017/s026303460606068x.

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Laser fusion requires very high energy/power output with high repetition rate over 10 Hz, which is very difficult with the current laser technologies. However, the recent research work on the phase controlling of the stimulated Brillouin scattering wave enables the realization of this kind of laser fusion driver. The recent progress of controlling the phase has been successfully demonstrated by the self-generated density modulation method proposed by one of the authors (Kong). Nevertheless, it showed a long-term fluctuation of the phase because of the long-term fluctuation of the density of the SBS medium due to the thermal fluctuation. This long-term thermal fluctuation is inevitable a fact in nature. The authors used a specially designed stabilizing system for the phase controlling system, which has the PZT control of the mirror for phase controlling SBS-PCM (the so-called feedback mirror). This system stabilizes the phase controlling system very well for more than 1 h. This technique will help the laser fusion driver to be realized sooner than expected. In addition, we propose a similar scheme to be applied to the ultra-fast pulse laser system, which must operate at high repetition rate for the laser fusion energy power plant.
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Dissertations / Theses on the topic "Lasers in controlled fusion"

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Evans, Peter John. "Laser plasma interaction for application to fusion energy /." View thesis, 2002. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030724.133202/index.html.

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Evans, Peter J., University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Laser plasma interaction for application to fusion energy." THESIS_CSTE_SFH_Evans_P.xml, 2002. http://handle.uws.edu.au:8081/1959.7/293.

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This thesis presents an investigation into inertial confinement fusion through mathematical models and computer simulations. Salient features affecting fusion are identified, in both energy absorption and fusion gains. Mathematical tools are applied to a directed investigation into plasma structure. Parameters such as these involved in electromagnetic energy absorption are identified first, and the next step is to model the immediate response of the plasma to this energy input, with a view to how this may be advantageous to initiating fusion. Models are developed that best suit plasma behaviour. The parameters are presented graphically against time and distance into a small plasma fuel pellet. It is noted how field density and ions form undulations through the plasma. Types of plasma fuels are discussed with regards to their key parameters. Computations are performed using the laser driven inertial energy option based on volume ignition with the natural adiabatic self-similarity compression and expansion hydrodynamics. The relative merits of each fuel are discussed against the parameters of density, volume and energy input versus fusion gains.
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Annovazzi, Alicia. "Contribution à l'étude - interaction laser-matière à différentes pressions résiduelles : Application au procédé micro-fusion laser sur lit de poudre." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCA024.

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Le procédé de micro-fusion sur lit de poudre par faisceau laser (LBM) et par faisceau d’électrons (EBM) sont deux procédés de fabrication additive permettant la réalisation de pièces métalliques. L’intense densité d’énergie fournie par ces deux sources permet la fusion locale de la matière formant ainsi un bain liquide, qui se solidifie après refroidissement. Ce changement d’état, qui se déroule sur des temps très courts, induit de complexes phénomènes thermodynamiques. Chacun de ces procédés offre des avantages qu’il serait intéressant de combiner. De ce fait, une combinaison des deux technologies a été investiguée. Le procédé EBM nécessitant un vide poussé dans l’enceinte de travail, l’enjeu de cette thèse repose donc sur l’étude de la fusion laser à faible pression environnante. Outre la combinaison recherchée, la fusion laser sous vide peut s’avérer intéressante dans l’amélioration de la santé matière des pièces, en particulier pour des matériaux sensibles à l’oxygène. Cependant, une nette diminution du rendement du procédé est observée. Ce travail de thèse s’articule en deux parties : a) En premier lieu, une étude expérimentale de la fabricabilité d’échantillons à différentes pressions a été réalisée. Pourdes paramètres de fabrication identiques, il en ressort qu’une diminution significative de la densification des échantillons est obtenue lors de la fabrication à faibles pressions. Les paramètres densité d’énergie volumique et vitesse de déplacement du laser ont dû être alors adaptés en fonction de la pression environnante utilisée. b) La seconde partie a été consacrée à l’explication des mouvements du bain liquide qui ont évolué en fonction de la pression résiduelle. A cet effet, une caméra rapide a permis de montrer les importantes instabilités présentes dans le lit de poudre par la zone de dénudation, et le bain liquide par sa morphologie, pour certains paramètres laser. Ces phénomènes ont été d’autant plus observés pour des pressions résiduelles inférieures à 30 mbar. Enfin, le pré-frittage du lit de poudredans le but d’effectuer un recuit "in-situ" des matériaux étudiés, a montré un effet bénéfique lors de l’interaction laser-matière sous vide. Une amélioration de la qualité de fusion et une augmentation du rendement de fabrication ont été alors démontrées
The laser beam melting (LBM) and electron beam melting (EBM) processes are two additive manufacturing technologies allowing the production of metallic parts. The intense energy density provided by the power supply is sufficient in order to melt the material creating a molten pool, and will solidify after cooling. This change of phase which takes place in a very short time, induced complexthermodynamics phenomena. Each of the processes offer advantages that could be interesting to be combined. Hence, a combination of the two technologies has been investigated. The EBM process requiring a rough vacuum in the work chamber, the issue of this work is based on the study of the laser melting at low pressure. Besides the intended combination, the selective laser melting under vacuum pressure can be attractive with the aim of improving the material integrity, in particular on the oxygen-sensitive materials. However, a clear decrease of the process efficiency has been observed. This work includes two parts: a) Firstly, an experimental study of samples fabricability at different pressures conditions is observed. For the same manufacturing parameters, a significant decrease of samples densification is observed in rough vacuum. The parameters volumetric energy density and the laser displacement speed have to beadapted in function of the chamber pressure. b) The second part is an attempt to explain the molten pool motion which change depending on the pressure. This can be achieved with a fast cam allowing the observations of strong instabilities in the powder bed with the denudation zone, and the molten pool with the morphology, for specific laser parameters. These phenomena are more important for residual pressures under 30 mbar. Then, a powder bed pre-sintering for the purpose of ”in-situ” annealing of the materials studied, has shown the beneficial effect during the interaction laser-powder under vacuum. Improvement melt quality and increased manufacturing efficiency have beenachieved
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Russell, Jared S. "An optimization approach to plant-controller co-design /." Online version of thesis, 2009. http://hdl.handle.net/1850/10769.

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Khudur, Alan. "Modification of wall materials in controlled fusion devices." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199336.

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Eliasson, Oskar, and Pawel Kupsc. "Modification of wall materials in controlled fusion devices." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199364.

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Craciun, Daniela. "Image-laser fusion for 3D modeling in complex environments." Paris, Télécom ParisTech, 2010. http://www.theses.fr/2008ENSTA058.

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La numérisation exhaustive et photoréaliste d'environnements complexes représente aujourd'hui un grand défi en raison d'une part du besoin d'automatisation des processus d'acquisition et de traitement qui sont encore quasiment manuels et d'autre part en raison de la difficulté de vérifier in situ le l'adéquation du modèle avec le cahier des charges. Très souvent on constate, a posteriori, une fois les données traitées, que le modèle 3D est incomplet et il n'est souvent pas possible de retourner sur site pour compléter les numérisations. Dans le cadre de cette thèse, nous nous intéressons à l'automatisation du processus de numérisation 3D d'environnements complexes et en particulier non-structurés qui sont plus difficiles aujourd'hui à traiter avec les outils proposés dans la littérature. Les travaux de recherches réalisés visent la mise en oeuvre à la fois de méthodologies d'acquisition des données et de développement d'algorithmes pour le traitement de données in-situ afin d'aider les opérateurs dans leur travail de manière à assurer la bonne numérisation du site. Comme contexte applicatif, nous nous intéressons aux grottes ornées préhistoriques qui sont des environnements particulièrement difficiles. Dans de tels environnements l'absence des structures habituellement utilisées pour la mise en correspondance et la mise en géométrie des images rend le problème très difficile, voir impossible. L'utilisation de cibles pour faciliter la partie de mise en géométrie des données n'est pas souhaitable d'une part parce qu'elle ralentit fortement les cadences de numérisation (alors que le temps de numérisation autorisé est restreint) et d'autre part car il est difficile voir interdit de poser des cibles sur des parois. Par ailleurs, le recours à des solutions basées sur des systèmes de localisation/navigation externe (centrale inertielle, triangulation, ect. ) pour aider au géoréférencement est difficilement envisageable et complexe à mettre en oeuvre (par rapport à des chantiers en extérieur ou le GPS est disponible). Nous proposons un système de numérisation par vision photogrammétrique et laserphotogrammétrique basé sur l'acquisition d'un réseau de panoramiques
One might wonder what can be gained from the image-laser fusion and in which measure such a hybrid system can generate automatically complete and photorealist 3D models of difficult to access and unstructured underground environments. In such environments, special attention must be given to the main issue standing behind the automation of the 3D modeling pipeline whic is represented by the capacity to match reliably image and laser data in GPS-denied and feature-less areas. In addition, time and in-situ access constraints require fast and automatic procedures for in-situ data acquisition, processing and interpretation in order to allow for in situ verification of the 3D scene model completeness. Finally, the currently generated 3D model represents the only available information providing situational awareness based on which autonomous behavior must be build in order to enable the system to act intelligently onthe- fly and explore the environment for ensuring the 3D scene model completeness. This dissertation evaluates the potential of a hybrid image-laser system for generating in-situ complete and photorealist 3D models of challenging environments, without requiring human operator intervention. The presented research focuses on two main aspects: (i) the automation of the 30 modeling pipeline, targeting the automatic data matching in feature-less and GPS-denied areas for in situ world modeling and (ii) the exploitation of the generated 3D models along with visual servoing procedures to provide mobile systems with autonomous site digitization and exploration capabilities. We design a complementary and cooperative image-laser fusion which lead to a 4D mosaicing sensor prototype
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Giet, Stephanie. "Grating-controlled infra-red vertical external cavity surface emitting lasers." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501821.

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Semiconductor Disk Lasers (SDLs) are compact lasers suitable for watt to multi-watt direct generation in the 670-2350nm waveband and frequency-doubled operation in the ultraviolet and visible regions. This is, however, critically dependent on the thermal management strategy used as, in this type of laser, the pump is absorbed over micrometer lengths and the gain and loss are temperature sensitive. In this thesis, we compare the two heat dissipation techniques that have been successfully deployed to-date: the "thin device" approach where the semiconductor active mirror is bonded onto a heatsink and its substrate subsequently removed, and the "heatspreader" technique where a high thermal conductivity plalelet is directly bonded onto the active part of the unprocessed epilayer.
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Kallmeyer, Frank. "Wavelength controlled solid state lasers with high output pulse energy." Berlin mbv, 2009. http://d-nb.info/993935974/04.

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Jackson, Danika Rae. "A study of poloidal asymmetries in tokamaks." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/21531.

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Books on the topic "Lasers in controlled fusion"

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Basov, N. G. Fizika lazernogo termoi͡a︡dernogo sinteza. Moskva: Izd-vo "Znanie", 1986.

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Basov, N. G. Fizika lazernogo termoyadernogo sinteza. Moskva: Znanie, 1988.

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Lebo, I. G. Isledovanie gidrodinamicheskoĭ neustoĭchivosti v zadachakh lazernogo termoi︠a︡dernogo sinteza metodami matematicheskogo modelirovanii︠a︡. Moskva: Fiziko-matematicheskai︠a︡ lit-ra, 2006.

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Yongkun, Ding, ed. Ji guang guan xing yue shu ju bian zhen duan xue: Laser Inertial Confinement Fusion Diagnostics. Beijing: Guo fang gong ye chu ban she, 2012.

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International, Conference on Solid State Lasers for Application to Inertial Confinement Fusion (3rd 1998 Monterey Calif ). Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion: 7-12 June, 1998, Monterey, California, USA. Bellingham, Wash: SPIE--The International Society for Optical Engineering, 1999.

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M, André, and France. Commissariat à l'énergie atomique, eds. Second Annual International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, 22-25 October, 1996, Paris, France. Bellingham, Wash: SPIE--the International Society for Optical Engineering, 1997.

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Workshop on Laser Interaction and Related Plasma Phenomena (Rensselaer Polytechnic Institute). Laser interaction and related plasma phenomena. New York: Springer Science, 1991.

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International Conference on Solid State Lasers for Application to Inertial Confinement Fusion (3rd 1998 Monterey, Calif.). NIF laser system performance ratings: Supplement to Proceedings of SPIE Volume 3492, Third annual International Conference on Solid State Lasers for Applications to Inertial Confinement Fusion. Bellingham, Wash: SPIE--The International Society for Optical Engineering, 1998.

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International, Workshop on Laser Interactions and Related Plasma Phenomena (11th 1993 Monterey Calif ). Laser interaction and related plasma phenomena: 11th international workshop, Monterey, CA, October 1993. New York: American Institute of Physics, 1994.

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International Workshop on Laser Interactions and Related Plasma Phenomena (12th 1995 Osaka, Japan). Laser interaction and related plasma phenomena: 12th international conference, Osaka, Japan April 1995. Edited by Nakai S, Miley George H. 1933-, and American Institute of Physics. New York: American Institute of Physics, 1996.

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Book chapters on the topic "Lasers in controlled fusion"

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Thyagarajan, K., and Ajoy Ghatak. "Laser-Induced Fusion." In Lasers, 403–15. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-6442-7_16.

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Teller, Edward. "Controlled Fusion, Soon!" In Current Trends in International Fusion Research, 5–10. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5867-5_2.

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Kaminow, I. P., and R. S. Tucker. "Mode-Controlled Semiconductor Lasers." In Springer Series in Electronics and Photonics, 211–316. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-75824-9_5.

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Kaminow, I. P., and R. S. Tucker. "Mode-Controlled Semiconductor Lasers." In Springer Series in Electronics and Photonics, 211–315. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-97074-0_5.

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Miyamoto, Kenro. "Development of Fusion Researches." In Plasma Physics for Controlled Fusion, 327–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49781-4_14.

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Dnestrovskii, Yuri N., and Dimitri P. Kostomarov. "Controlled Fusion and Numerical Simulation." In Numerical Simulation of Plasmas, 1–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82592-7_1.

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Apollonov, V. V. "Regenerative CO2 Amplifier with Controlled Pulse Duration." In High-Energy Molecular Lasers, 319–23. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-33359-5_38.

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Apollonov, V. V. "Self-controlled Volume Discharge Based Molecular Lasers Scaling." In High-Energy Molecular Lasers, 425–29. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-33359-5_51.

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Miyamoto, Kenro. "Nature of Plasma." In Plasma Physics for Controlled Fusion, 1–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49781-4_1.

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Miyamoto, Kenro. "Waves in Hot Plasmas." In Plasma Physics for Controlled Fusion, 195–224. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49781-4_10.

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Conference papers on the topic "Lasers in controlled fusion"

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Matsumoto, Osamu, Ryo Yasuhara, Takashi Kurita, Tadashi Ikegawa, Takashi Sekine, Toshiyuki Kawashima, Junji Kawanaka, et al. "Development of thermally controlled HALNA DPSSL for inertial fusion energy." In Lasers and Applications in Science and Engineering, edited by Alexis V. Kudryashov, Alan H. Paxton, Vladimir S. Ilchenko, Adolf Giesen, Detlef Nickel, Steven J. Davis, Michael C. Heaven, and J. Thomas Schriempf. SPIE, 2006. http://dx.doi.org/10.1117/12.645644.

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Kurita, T., T. Kawashima, T. Ikegawa, O. Matsumoto, R. Yasuhara, T. Sekine, J. Kawanaka, et al. "Thermally-edge-controlled slab laser for inertial fusion energy and applications." In 2005 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2005. http://dx.doi.org/10.1109/cleo.2005.201714.

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McGloin, D., J. Buchanan, D. R. Burnham, Robert M. Lorenz, J. Scott Edgar, Gavin D. M. Jeffries, Yiqiong Zhao, and Daniel T. Chiu. "Controlled fusion of femtoliter-volume aqueous droplets using holographic optical tweezers." In 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference. IEEE, 2007. http://dx.doi.org/10.1109/cleoe-iqec.2007.4386646.

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Cilesiz, Inci F., Eric K. Chan, Ashley J. Welch, and Sharon L. Thomsen. "Controlled temperature tissue fusion: Ho:YAG laser welding of rat intestine in vivo." In Photonics West '95, edited by R. Rox Anderson, Graham M. Watson, Rudolf W. Steiner, Douglas E. Johnson, Stanley M. Shapshay, Michail M. Pankratov, George S. Abela, et al. SPIE, 1995. http://dx.doi.org/10.1117/12.209141.

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Mustari, Asril Pramutadi Andi, and Minoru Takahashi. "Corrosion Properties of Welded Ferritic-Martensitic Steels in Liquid Lead-Bismuth at 600C." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29927.

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A static corrosion test for ferritic-martensitic steel HCM12A with three types of welding in lead-bismuth eutectic (LBE) was conducted at 600°C for 500 h. The specifications of TIG welding, YAG laser welding and electron beam welding were 40A/12V of electrical conductance, 278W/14.3J of heat input and 5.0 mA of beam electric current, respectively. Oxygen concentration was controlled to be about 4.7×10−6wt% by injecting Ar-H2-H2O gas mixture into LBE. After corrosion test, cross sections of the specimens were analyzed by using optical microscope and SEM/EDX. Toughness profiles of fusion zone and base metal were determined by using Vickers hardness tool. The results show coarse grain structure in fusion zone (FZ) and typical ferritic-martensitic grain structure in base metal (BM). It was found that those Cr-rich spinel oxide layer and diffusion zone were formed on the surface. The total thickness of oxide layer and diffusion zone on and in the fusion zone was about 18–30μm. It was much thicker than 10–15μm on BM. The hardness was higher in the fusion zone than in the BM.
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Permyakov, I. L., D. A. Pumpyanskyi, I. Yu Pyshmintsev, and V. I. Stolyarov. "Advanced Technologies for Spiral Welded Oil and Gas Line Pipes." In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10254.

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To obtain a higher strength in line pipes of diameter up to 1420 mm the controlled rolling of plates and coils or heat treatment of the product were applied. Metallurgical design based on purification, low carbon content, micro-alloying and controlled rolling has increased yield stress, ductility and low temperature behavior of the developed steels. Maximum homogeneous structure of the base metal and the weld joint, minimum residual stresses, which is beneficial for a better stress corrosion and fatigue resistance, were obtained through quench and tempering. Full scale tests have shown formed microstructure retards crack propagation from sharp defects notched in strip or plate end welds under both static and cyclic pipe loading. Combined laser–submerged are welding was tested for further improvement of properties of the end joints. Features of microstructure in weld, fusion and heat affected zone were studied. Advanced properties of the joints were found in laser welded steels but inherent high cooling rates must be reduced using different methods.
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Greco, Sebastian, Kevin Gutzeit, Hendrik Hotz, Marc Schmidt, Marco Zimmermann, Benjamin Kirsch, and Jan C. Aurich. "Influence of Machine Type and Powder Batch During Laser-Based Powder Bed Fusion (L-PBF) of AISI 316L." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-60448.

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Abstract The use of additive manufacturing (AM) in industrial applications is steadily increasing due to its near net shape production and high design-freedom. For metallic components, laser-based powder bed fusion (L-PBF) is currently one of the most widely used AM processes. During L-PBF, a component is manufactured layer by layer from a powdery raw material. The process is controlled by a multitude of parameters like the laser power, scanning speed and layer thickness, whose combination significantly influences the properties of the components. In this study, the influence of the L-PBF machine type and the influence of the powder batch are investigated by means of relative density, microhardness and microstructure of the components. For this purpose, three setups are defined, differing in the powder batch and machine type used. By comparing the process results of the additive manufacturing of different setups, the influence of the machine type and powder batch are determined. The considered material is stainless steel AISI 316L. The results revealed significant differences between all investigated properties of the additively manufactured components. Consequently, process parameter combinations cannot be transferred between different machine types and powder batches without verification of the component properties and, if necessary, special adaption of the process.
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Ascari, Alessandro, and Giampaolo Campana. "Application of Laser in Joining Aluminum Foam Hybrid Materials." In ASME 2013 International Manufacturing Science and Engineering Conference collocated with the 41st North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/msec2013-1057.

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This article illustrates an experimental campaign aimed at assessing preliminary guidelines for the application of the laser in joining cellular-structured hybrid materials. In particular the target specimens exploited were all characterized by the presence of an aluminum foam core and by an external skin, made in aluminum or in stainless steel. The goal of the present paper is to underline a global feasibility of laser joining of these materials pointing out the role of the main process parameters and to suggest some original techniques which could be adopted in order to improve the overall quality of the joint. The experience described pointed out that, when dealing with this kind of materials, the role of the laser can be dual: in case of high energy density applications it can be used for local fusion of the workpiece, as in traditional welding, while in low energy density ones the radiation can be exploited as a controlled heating source for promoting local thermal actions particularly on the cellular portion of the material.
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Khanna, Kshitiz, and Raymond K. Yee. "Parametric Study of Metal 3D Printing Process Using Finite Element Simulation." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10745.

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Abstract Metal additive manufacturing (AM), also known as metal 3D printing, is a challenging process to be controlled for desirable outcome due to its many process parameters. Residual stresses or deformations may occur in an AM manufactured part because of rapid heating and cooling cycles in the layers. The effect of process-controlled parameters in laser powder bed fusion (L-PBF) on deformations of a manufactured part has not been well examined and reported only sparely in literature. The objectives of this paper are: to study deformation behavior of a L-PBF printed part using finite element method, to perform parametric study of process input variables by changing few selected process parameters in the simulations, and to attempt identifying optimal values within the studied range of selected parameters to minimize part distortion. In this study, the material used for the heat sink finite element model was Inconel 718 which is commonly found in AM manufactured parts. ANSYS finite element program was employed to simulate a heat sink fabrication. The finished dimensions of the heat sink model were 12 mm in height, 26 mm in width, and 26 mm in depth. Thermal-mechanical sequential coupling approach was employed to simulate layer-by-layer built up process. The resulting deformations was evaluated by varying laser travel speed, base plate temperature, and initial layer angle. The maximum deformation (distortion) was observed at the corners of the heat sink model upon release from the base plate and found to be approximately 0.115 mm. Based on this study, the relative optimal simulation results for minimum distortion for selected parameters were 600 °K base plate temperature, 600 mm/sec speed of laser, and 0° initial layer angle. These results can be served as foundation for further study of varying other L-PBF process parameters.
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Gruebele, Martin. "QUANTUM CONTROLLED NUCLEAR FUSION." In 72nd International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2017. http://dx.doi.org/10.15278/isms.2017.mh12.

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Reports on the topic "Lasers in controlled fusion"

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Griem, H. R., and C. S. Liu. Maryland controlled fusion research program. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/5199742.

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Deri, R. Semiconductor Laser Diode Pumps for Inertial Fusion Energy Lasers. Office of Scientific and Technical Information (OSTI), January 2011. http://dx.doi.org/10.2172/1018822.

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Eder, D., A. Throop, J. Kimbrough, M. Stowell, D. White, P. Song, N. Back, et al. Mitigation of Electromagnetic Pulse (EMP) Effects from Short-Pulse Lasers and Fusion Neutrons. Office of Scientific and Technical Information (OSTI), March 2009. http://dx.doi.org/10.2172/950076.

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Mackinnon, A., M. Key, S. Hatchett, A. MacPhee, M. Foord, M. Tabak, R. Town, and P. Patel. Developing the Physics Basis of Fast Ignition Experiments at Future Large Fusion-class lasers. Office of Scientific and Technical Information (OSTI), February 2008. http://dx.doi.org/10.2172/925999.

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Thomas, E. W. Atomic data for controlled fusion research. Volume III. Particle interactions with surfaces. Office of Scientific and Technical Information (OSTI), February 1985. http://dx.doi.org/10.2172/5959343.

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Wiese, W. L., ed. Atomic data for controlled fusion research. Volume IV. Spectroscopic data for iron. Office of Scientific and Technical Information (OSTI), February 1985. http://dx.doi.org/10.2172/5886757.

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Ramsey, A. T., H. G. Adler, and K. W. Hill. Reduced optical transmission of SiO{sub 2} fibers used in controlled fusion diagnostics. Office of Scientific and Technical Information (OSTI), February 1993. http://dx.doi.org/10.2172/10135031.

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Antonsen, T. M. Jr, J. F. Drake, J. M. Finn, P. Guzdar, A. Hassam, C. S. Liu, and E. Ott. Maryland controlled fusion research program. Progress report, November 1, 1992--October 31, 1993. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10106136.

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Hunter, H. T., R. A. Phaneuf, and M. I. Kirkpatrick. ORNL (Oak Ridge National Laboratory) Controlled Fusion Atomic Data Center: Thirty years later. Office of Scientific and Technical Information (OSTI), August 1990. http://dx.doi.org/10.2172/6698305.

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Antonsen, T. M. Jr, J. F. Drake, P. Guzdar, A. Hassam, C. S. Liu, and E. Ott. Maryland Controlled Fusion Research Program. Progress report, November 1, 1992--October 31, 1995. Office of Scientific and Technical Information (OSTI), May 1995. http://dx.doi.org/10.2172/120002.

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