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Books > Science & Mathematics > Physics > States of matter

Transport Coefficients of Fluids (Hardcover, 2006 ed.): Byung Chan Eu Transport Coefficients of Fluids (Hardcover, 2006 ed.)
Byung Chan Eu
R4,593 Discovery Miles 45 930 Ships in 10 - 15 working days

In this monograph, the density ?uctuation theory of transport coe?cients of simple and complex liquids is described together with the kinetic theory of liquids, the generic van der Waals equation of state, and the modi?ed free volume theory. The latter two theories are integral parts of the density ?- tuation theory, which enables us to calculate the density and temperature dependence of transport coe?cients of liquids from intermolecular forces. The terms nanoscience and bioscience are the catch phrases currently in fashion in science. It seems that much of the fundamentals remaining unsolved or poorly understood in the science of condensed matter has been overshadowed by the frenzy over the more glamorous disciplines of the former, shunned by novices, and are on the verge of being forgotten. The transport coe?cients of liquids and gases and related thermophysical properties of matter appear to be one such area in the science of macroscopic properties of molecular systems and statisticalmechanicsofcondensedmatter. Evennano-andbiomaterials, h- ever, cannot be fully and appropriately understood without ?rm grounding and foundations in the macroscopic and molecular theories of transport pr- ertiesandrelatedthermophysicalpropertiesofmatterinthecondensedphase. Oneisstilldealingwithsystemsmadeupofnotafewparticlesbutamultitude of them, often too many to count, to call them few-body problems that can be understoodwithoutthehelpofstatisticalmechanicsandmacroscopicphysics. In the density ?uctuation theory of transport coe?cients, the basic approach taken is quite di?erent from the approaches taken in the conventional kinetic theories of gases and liquids

Optical Response of Nanostructures - Microscopic Nonlocal Theory (Hardcover, 2003 ed.): Kikuo Cho Optical Response of Nanostructures - Microscopic Nonlocal Theory (Hardcover, 2003 ed.)
Kikuo Cho
R2,873 Discovery Miles 28 730 Ships in 10 - 15 working days

This book gives a theoretical description of linear and nonlinear optical responses of matter with special emphasis on the microscopic and "nonlocal" nature of resonant response. The response field and induced polarization are determined self-consistently in terms of simultaneous linear or nonlinear polynomial equations. This scheme is a general one situated between QED and macroscopic response theory, but is most appropriate for determining the dependence of optical signals on the size, shape, and internal structure of a nanostructure sample. As a highlight of the scheme, the multi-resonant enhancement of the DFWM signal is described together with its experimental verification.

Quantitative Recombination and Transport Properties in Silicon from Dynamic Luminescence (Hardcover, 2014 ed.): Johannes... Quantitative Recombination and Transport Properties in Silicon from Dynamic Luminescence (Hardcover, 2014 ed.)
Johannes Giesecke
R4,192 R3,623 Discovery Miles 36 230 Save R569 (14%) Ships in 12 - 19 working days

Harmonically modulated luminescence combines the advantages of highly sensitive luminescence metrology with an immediate dynamic access to carrier lifetime in semiconductors at a minimum of required a priori information. The present work covers theoretical, conceptual, and experimental advances of the harmonically modulated luminescence technique. Theoretical constraints of dynamic carrier lifetime techniques are rigorously elaborated, including the proof of their differential nature and their characteristics at nonuniform spatial distributions of recombination rate. The pathway toward a unified, reliable, and versatile harmonically modulated carrier lifetime metrology is delineated - covering the entire solar cell production chain from bare ingots to finished solar cells. Accurate access to miscellaneous relevant recombination and transport properties via harmonically modulated luminescence is demonstrated and experimentally validated, embracing injection-dependent carrier lifetimes at extremely low injection conditions, a spatially resolved carrier lifetime calibration of luminescence images, and accurate approaches to both net dopant concentration and minority carrier mobility.

Solid Surfaces, Interfaces and Thin Films (Hardcover, 6th ed. 2015): Hans Luth Solid Surfaces, Interfaces and Thin Films (Hardcover, 6th ed. 2015)
Hans Luth
R3,502 Discovery Miles 35 020 Ships in 10 - 15 working days

This book emphasises both experimental and theoretical aspects of surface, interface and thin-film physics. As in previous editions the preparation of surfaces and thin films, their atomic and morphological structure, their vibronic and electronic properties as well as fundamentals of adsorption are treated. Because of their importance in modern information technology and nanostructure research, particular emphasis is paid to electronic surface and interface states, semiconductor space charge layers and heterostructures. A special chapter of the book is devoted to collective phenomena at interfaces and in thin films such as superconductivity and magnetism. The latter topic includes the meanwhile important issues giant magnetoresistance and spin-transfer torque mechanism, both effects being of high interest in information technology. In this new edition, for the first time, the effect of spin-orbit coupling on surface states is treated. In this context the class of the recently detected topological insulators, materials of significant importance for spin electronics, are discussed. Particular emphasis, hereby, is laid on the new type of topologically protected surface states with well-defined spin orientation. Furthermore, some important well established experimental techniques such as X-ray diffraction (XRD) and reflection anisotropy spectroscopy (RAS), which were missing so far in earlier editions, were added in this new 6th edition of the book.

Sources and Scintillations - Refraction and Scattering in Radio Astronomy (Hardcover): Richard Strom, Peng Bo, Mark Walker, Nan... Sources and Scintillations - Refraction and Scattering in Radio Astronomy (Hardcover)
Richard Strom, Peng Bo, Mark Walker, Nan Rendong
R3,155 Discovery Miles 31 550 Ships in 10 - 15 working days

The topics covered in this book include: Theory of Scattering and Scintillation, Distribution of Scattering Material, Intra-day Variability, Pulsars and their Magnetospheric Structure, Polarization of AGN, Interplanetary Scintillation, and Future Highly-Sensitive Radio Telescopes. The introductory papers emphasize the essential properties of diffractive and refractive scattering, how they differ in temporal and frequency structure, and what they reveal about irregularities in the ISM. Pulsars can be examined in a number of different ways as a function of frequency: time variability (both short and long term), DM changes, pulse broadening, angular extent, and Faraday rotation. Intra-day variable sources (IDVs) are another major topic of the book. Although many variable sources clearly exhibit intrinsic changes, IDVs are generally believed to result from scintillation effects. They require source sizes on the ten micro-arcsec scale, the most extreme cases having profound implications for source lifetimes and emission mechanisms. Finally, a dozen contributions describe future large radio telescope projects, especially the Chinese FAST effort to build a 500 m spherical reflector of innovative design.

Space Plasma Simulation (Hardcover, 2003 ed.): Joerg Buchner, Christian Dum, Manfred Scholer Space Plasma Simulation (Hardcover, 2003 ed.)
Joerg Buchner, Christian Dum, Manfred Scholer
R4,602 Discovery Miles 46 020 Ships in 12 - 19 working days

This topical volume has been written with the explicit aim to provide a high-level introductory book for a field where there were no elementary textbooks available. It addresses postgraduate students and young scientists investigating space plasma physics or planning to specialize in this field. Experienced researchers will find this book to be a comprehensive source of reference as well as a source of advanced topics for their courses.

Inelastic Analysis of Solids and Structures (Hardcover, 2005 ed.): M. Kojic, Klaus-Jurgen Bathe Inelastic Analysis of Solids and Structures (Hardcover, 2005 ed.)
M. Kojic, Klaus-Jurgen Bathe
R4,426 Discovery Miles 44 260 Ships in 10 - 15 working days

Inelastic Analysis of Solids and Structures presents in a unified manner the physical and theoretical background of inelastic material models and computational methods, and illustrates the behavior of the models in typical engineering conditions. The book describes experimental observations and principles of mechanics, and efficient computational algorithms for stress calculations as typically performed in finite element analysis. The theoretical background is given to an extent necessary to describe the commonly employed material models in metal isotropic and orthotropic plasticity, thermoplasticity and viscoplasticity, and the plasticity of geological materials. The computational algorithms are developed in a unified manner with some detailed derivations of the algorithmic relations. Many solved examples are presented, which are designed to give insight into the material behavior in various engineering conditions, and to demonstrate the application of the computational algorithms.

Quantum Many-Body Physics of Ultracold Molecules in Optical Lattices - Models and Simulation Methods (Hardcover, 2015 ed.):... Quantum Many-Body Physics of Ultracold Molecules in Optical Lattices - Models and Simulation Methods (Hardcover, 2015 ed.)
Michael L Wall
R3,790 Discovery Miles 37 900 Ships in 12 - 19 working days

This thesis investigates ultracold molecules as a resource for novel quantum many-body physics, in particular by utilizing their rich internal structure and strong, long-range dipole-dipole interactions. In addition, numerical methods based on matrix product states are analyzed in detail, and general algorithms for investigating the static and dynamic properties of essentially arbitrary one-dimensional quantum many-body systems are put forth. Finally, this thesis covers open-source implementations of matrix product state algorithms, as well as educational material designed to aid in the use of understanding such methods.

Theoretical Study on Correlation Effects in Topological Matter (Hardcover, 1st ed. 2017): Hiroki Isobe Theoretical Study on Correlation Effects in Topological Matter (Hardcover, 1st ed. 2017)
Hiroki Isobe
R3,440 Discovery Miles 34 400 Ships in 12 - 19 working days

This thesis elucidates electron correlation effects in topological matter whose electronic states hold nontrivial topological properties robust against small perturbations. In addition to a comprehensive introduction to topological matter, this thesis provides a new perspective on correlated topological matter. The book comprises three subjects, in which electron correlations in different forms are considered. The first focuses on Coulomb interactions for massless Dirac fermions. Using a perturbative approach, the author reveals emergent Lorentz invariance in a low-energy limit and discusses how to probe the Lorentz invariance experimentally. The second subject aims to show a principle for synthesizing topological insulators with common, light elements. The interplay between the spin-orbit interaction and electron correlation is considered, and Hund's rule and electron filling are consequently found to play a key role for a strong spin-orbit interaction important for topological insulators. The last subject is classification of topological crystalline insulators in the presence of electron correlation. Unlike non-interacting topological insulators, such two- and three-dimensional correlated insulators with mirror symmetry are demonstrated to be characterized, respectively, by the Z4 and Z8 group by using the bosonization technique and a geometrical consideration.

The IGBT Device - Physics, Design and Applications of the Insulated Gate Bipolar Transistor (Hardcover, 2nd edition): B.Jayant... The IGBT Device - Physics, Design and Applications of the Insulated Gate Bipolar Transistor (Hardcover, 2nd edition)
B.Jayant Baliga
R4,484 R4,066 Discovery Miles 40 660 Save R418 (9%) Ships in 12 - 19 working days

The IGBT Device: Physics, Design and Applications of the Insulated Gate Bipolar Transistor, Second Edition provides the essential information needed by applications engineers to design new products using the device in sectors including consumer, industrial, lighting, transportation, medical and renewable energy. The IGBT device has proven to be a highly important Power Semiconductor, providing the basis for adjustable speed motor drives (used in air conditioning and refrigeration and railway locomotives), electronic ignition systems for gasoline powered motor vehicles and energy-saving compact fluorescent light bulbs. The book presents recent applications in plasma displays (flat-screen TVs) and electric power transmission systems, alternative energy systems and energy storage, but it is also used in all renewable energy generation systems, including solar and wind power. This book is the first available on the applications of the IGBT. It will unlock IGBT for a new generation of engineering applications, making it essential reading for a wide audience of electrical and design engineers, as well as an important publication for semiconductor specialists.

Damped Wave Transport and Relaxation (Hardcover): Kal Renganathan Sharma Damped Wave Transport and Relaxation (Hardcover)
Kal Renganathan Sharma
R5,948 Discovery Miles 59 480 Ships in 12 - 19 working days

Transient problems in transport phenomena have a variety of applications, ranging from drug delivery systems in chemotherapy in bioengineering to heat transfer to surfaces in fluidized bed combustion (FBC) boilers in mechanical engineering. However, the attention given to transient problems is disproportionate with its occurrence in the industry. Damped Wave Transport and Relaxation looks at transient problems in heat, mass and momentum transfer: including non-Fourier effects of conduction and relaxation; non-Fick effects of mass diffusion and relaxation; and non-Newtonian effects of viscous momentum transfer and relaxation. The author also reviews applications to current problems of interest and uses worked examples and illustrations to describe the manifestations of using generalized transport equations. This book is intended for graduate students in transport phenomena and is an ideal reference source for industrial engineers.
* Provides a connection with molecular phenomena
* Separate sections are devoted to heat, mass and momentum transfer
* Includes exercises and examples of applications

Herbert Froehlich - A Physicist Ahead of His Time (Hardcover, 2015 ed.): G.J. Hyland Herbert Froehlich - A Physicist Ahead of His Time (Hardcover, 2015 ed.)
G.J. Hyland
R2,444 R2,056 Discovery Miles 20 560 Save R388 (16%) Ships in 12 - 19 working days

This biography provides a stimulating and coherent blend of scientific and personal narratives describing the many achievements of the theoretical physicist Herbert Froehlich. For more than half a century, Froehlich was an internationally renowned and much respected figure who exerted a decisive influence, often as a 'man ahead of his time', in fields as diverse as meson theory and biology. Although best known for his contributions to the theory of dielectrics and superconductivity, he worked in many other fields, his most important legacy being the pioneering introduction quantum field-theoretical methods into condensed matter physics in 1952, which revolutionised the subsequent development of the subject. Gerard Hyland has written an absorbing and informative account, in which Herbert Froehlich's magnetic personality shines through.

Multi-Scale Physics in Coronal Heating and Solar Wind Acceleration - From the Sun into the Inner Heliosphere (Hardcover, 2013... Multi-Scale Physics in Coronal Heating and Solar Wind Acceleration - From the Sun into the Inner Heliosphere (Hardcover, 2013 ed.)
David Burgess, James Drake, Eckart Marsch, Rudolf Steiger, Marco Velli, …
R4,950 R3,805 Discovery Miles 38 050 Save R1,145 (23%) Ships in 12 - 19 working days

This volume explores the cross-linkages between the kinetic processes and macroscopic phenomena in the solar atmosphere, which are at the heart of our current understanding of the heating of the closed and open corona and the acceleration of the solar wind. The focus lies on novel data, on theoretical models that have observable consequences through remote sensing, and on near-solar and inner-heliosphere observations, such as anticipated by the upcoming Solar Orbiter and Solar Probe missions, which are currently developed by the international community. This volume is aimed at students and researchers active in solar physics and space science. Previously published in Space Science Reviews journal, Vol. 172, Nos. 1-4, 2012.

Field Theory, Disorder And Simulations (Paperback): Giorgio Parisi Field Theory, Disorder And Simulations (Paperback)
Giorgio Parisi
R2,279 Discovery Miles 22 790 Ships in 12 - 19 working days

This volume is a collection of lectures and selected papers by Giorgio Parisi on the subjects of Field Theory (perturbative expansions, nonperturbative phenomena and phase transitions), Disordered Systems (mainly spin glasses) and Computer Simulations (lattice gauge theories).The basic problems discussed in the Field Theory section concern the interplay between perturbation theory and nonperturbative phenomena which are present when one deals with infrared or ultraviolet divergences or with nonconvergent perturbative expansions. The section on Disordered Systems contains a complete discussion about the replica method and its probabilistic interpretation, and also includes a short paper on multifractals. In the Simulations section, there is a series of lectures devoted to the study of quantum chromodynamics and a review paper on simulations in complex systems.The works of Giorgio Parisi have repeatedly displayed a remarkable depth of originality and innovation, and have paved the way for new research in many areas. This personal selection of his lectures and papers, complete with an original introduction by him, undoubtedly serves as a vital reference book for physicists and mathematicians working in these fields.

Mechanical Self-Assembly - Science and Applications (Hardcover, 2013 ed.): XI Chen Mechanical Self-Assembly - Science and Applications (Hardcover, 2013 ed.)
XI Chen
R4,374 R3,517 Discovery Miles 35 170 Save R857 (20%) Ships in 12 - 19 working days

"Mechanical Self-Assembly: Science and Applications" introduces a novel category of self-assembly driven by mechanical forces. This book discusses self-assembly in various types of small material structures including thin films, surfaces, and micro- and nano-wires, as well as the practice's potential application in micro and nanoelectronics, MEMS/NEMS, and biomedical engineering. The mechanical self-assembly process is inherently quick, simple, and cost-effective, as well as accessible to a large number of materials, such as curved surfaces for forming three-dimensional small structures. Mechanical self-assembly is complementary to, and sometimes offer advantages over, the traditional micro- and nano-fabrication.

Human-Computer Interaction Symposium - IFIP 20th World Computer Congress, Proceedings of the 1st TC 13 Human-Computer... Human-Computer Interaction Symposium - IFIP 20th World Computer Congress, Proceedings of the 1st TC 13 Human-Computer Interaction Symposium (HCIS 2008), September 7-10, 2008, Milano, Italy (Hardcover, 2008 ed.)
Fabio Paterno, Annelise Mark Pejtersen
R3,004 Discovery Miles 30 040 Ships in 10 - 15 working days

The IFIP World Computer Congress (WCC) is one of the most important conferences in the area of computer science and a number of related Human and Social Science disciplines at the worldwide level and it has a federated structure, which takes into account the rapidly growing and expanding interests in this area. Human-Computer Interaction is now a mature and still dynamically evolving part of this area, which is represented in IFIP by the Technical Committee 13 on HCI. We are convinced that in this edition of WCC, which takes place for the first time in Italy, it will be interesting and useful to have a Symposium on Human- Computer Interaction in order to present and discuss a number of contributions in this field. There has been increasing awareness among designers of interactive systems of the importance of designing for usability, but we are still far from having products that are really usable, and usability can mean different things depending on the application domain. We are all aware that too many users of current technology feel often frustrated because computer systems are not compatible with their abilities and needs with existing work practices. As designers of tomorrow technology, we have the responsibility of creating computer artefacts that would permit better user experience with the various computing devices, so that users may enjoy more satisfying experiences with information and communications technologies.

Dispersion Stability, Microstructure and Phase Transition of Anisotropic Nanodiscs (Hardcover, 2014 ed.): Ravi Kumar Pujala Dispersion Stability, Microstructure and Phase Transition of Anisotropic Nanodiscs (Hardcover, 2014 ed.)
Ravi Kumar Pujala
R3,467 Discovery Miles 34 670 Ships in 12 - 19 working days

This thesis explores the dispersion stability, microstructure and phase transitions involved in the nanoclay system. It describes the recently discovered formation of colloidal gels via two routes: the first is through phase separation and second is by equilibrium gelation and includes the first reported experimental observation of a system with high aspect ratio nanodiscs. The phase behavior of anisotropic nanodiscs of different aspect ratio in their individual and mixed states in aqueous and hydrophobic media is investigated. Distinct phase separation, equilibrium fluid and equilibrium gel phases are observed in nanoclay dispersions with extensive aging. The work then explores solution behavior, gelation kinetics, aging dynamics and temperature-induced ordering in the individual and mixed states of these discotic colloids. Anisotropic ordering dynamics induced by a water-air interface, waiting time and temperature in these dispersions were studied in great detail along with aggregation behavior of nanoplatelets in hydrophobic environment of alcohol solutions.

Reliability and Degradation of III-V Optical Devices (Hardcover): Osamu Ueda Reliability and Degradation of III-V Optical Devices (Hardcover)
Osamu Ueda
R3,677 Discovery Miles 36 770 Ships in 10 - 15 working days

Better understand the mechanism of degradation, and gain insight into the major degradation modes of optical devices fabricated from three different systems with this book. It explains the character of defects and imperfections induced during material growth and fabrication, presents techniques for failure analysis, and describes methods for elimination of defect-generating mechanisms.

Theoretical Methods for Strongly Correlated Electrons (Hardcover): David Senechal, Andre-Marie Tremblay, Claude Bourbonnais Theoretical Methods for Strongly Correlated Electrons (Hardcover)
David Senechal, Andre-Marie Tremblay, Claude Bourbonnais
R4,405 Discovery Miles 44 050 Ships in 10 - 15 working days

Focusing on the purely theoretical aspects of strongly correlated electrons, this volume brings together a variety of approaches to models of the Hubbard type – i.e., problems where both localized and delocalized elements are present in low dimensions. The chapters are arranged in three parts. The first part deals with two of the most widely used numerical methods in strongly correlated electrons, the density matrix renormalization group and the quantum Monte Carlo method. The second part covers Lagrangian, Functional Integral, Renormalization Group, Conformal, and Bosonization methods that can be applied to one-dimensional or weakly coupled chains. The third part considers functional derivatives, mean-field, self-consistent methods, slave-bosons, and extensions. Taken together, the contributions to this volume represent a comprehensive overview of current problems and developments.

Carbon at High Temperatures (Hardcover, 1st ed. 2015): Alexander Savvatimskiy Carbon at High Temperatures (Hardcover, 1st ed. 2015)
Alexander Savvatimskiy
R3,572 Discovery Miles 35 720 Ships in 12 - 19 working days

This book deals with the properties and behavior of carbon at high temperatures. It presents new methods and new ways to obtain the liquid phase of carbon. Melting of graphite and the properties of liquid carbon are presented under stationary heat and pulse methods. Metal like properties of molten graphite at high initial density are indicated. A new possible transition of liquid carbon from metal to nonmetal behavior much above the melting point is mentioned. Methodical questions of pulse heating, in particular the role of pinch-pressure in receiving a liquid state of carbon, are discussed. The reader finds evidence about the necessity of applying high pressure (higher than 100 bar) to melt graphite (melting temperature 4800+/-100 K). The reader can verify the advantage of volume pulse electrical heating before surface laser heating to study the physical properties of carbon, including enthalpy, heat capacity, electrical resistivity and temperature. The advantages of fast heating of graphite by pulsed electric current during a few microseconds are shown. The data obtained for the heat capacity of liquid carbon under constant pressure and constant volume were used to estimate the behavior at temperatures much higher 5000 K.

Fundamental Problems of Mesoscopic Physics - Interactions and Decoherence (Hardcover, 2004 ed.): Igor V. Lerner, Boris L.... Fundamental Problems of Mesoscopic Physics - Interactions and Decoherence (Hardcover, 2004 ed.)
Igor V. Lerner, Boris L. Altshuler, Yuval Gefen
R8,503 Discovery Miles 85 030 Ships in 10 - 15 working days

Mesoscopic physics deals with effects at submicron and nanoscales where the conventional wisdom of macroscopic averaging is no longer applicable. A wide variety of new devices have recently evolved, all extremely promising for major novel directions in technology, including carbon nanotubes, ballistic quantum dots, hybrid mesoscopic junctions made of different type of normal, superconducting and ferromagnetic materials. This, in turn, demands a profound understanding of fundamental physical phenomena on mesoscopic scales. As a result, the forefront of fundamental research in condensed matter has been moved to the areas where the interplay between electron-electron interactions and quantum interference of phase-coherent electrons scattered by impurities and/or boundaries is the key to such understanding. An understanding of decoherence as well as other effects of the interactions is crucial for developing future electronic, photonic and spintronic devices, including the element base for quantum computation.

Material Research in Atomic Scale by Moessbauer Spectroscopy (Hardcover, 2003 ed.): Miroslav Mashlan, Marcel Miglierini, Peter... Material Research in Atomic Scale by Moessbauer Spectroscopy (Hardcover, 2003 ed.)
Miroslav Mashlan, Marcel Miglierini, Peter Schaaf
R1,737 Discovery Miles 17 370 Ships in 10 - 15 working days

Mossbauer spectroscopy is uniquely able to probe hyperfine interactions by looking at the short-range order of resonant atoms. Materials containing an appropriate isotope as one of their constituent atoms, such as iron or tin, are readily investigated. But even materials that do not contain Mossbauer-active atoms can be investigated if the probe atoms are incorporated in minor quantities (ca. 0.1 at.-%) to act as molecular-level indicators.

These 35 papers collected here represent a state-of-the-art description of Mossbauer spectroscopy techniques applied to advanced materials. The topics covered comprise investigations of nanomaterials, nanoparticles, and quasicrystals, artificially structured materials as well as applications of Mossbauer spectroscopy in chemistry, mineralogy and metallurgy. The main aim of is the dissemination of information on research and recent developments of the method in materials science as obtained in leading Mossbauer laboratories. "

Ionization and Plasma Dynamics of Single Large Xenon Clusters in Superintense XUV Pulses (Hardcover, 1st ed. 2016): Daniela Rupp Ionization and Plasma Dynamics of Single Large Xenon Clusters in Superintense XUV Pulses (Hardcover, 1st ed. 2016)
Daniela Rupp
R3,471 Discovery Miles 34 710 Ships in 12 - 19 working days

At the heart of this thesis is the young field of free electron laser science, whose experimental and theoretical basics are described here in a comprehensible manner. Extremely bright and ultra short pulses from short wavelength free-electron lasers (FELs) have recently opened the path to new fields of research. The x-ray flashes transform all matter into highly excited plasma states within femtoseconds, while their high spatial and temporal resolution allows the study of fast processes in very small structures. Even imaging of single molecules may be within reach if ultrafast radiation damage can be understood and brought under control. Atomic clusters have proven to be ideal model systems for light-matter interaction studies in all wavelength regimes, being size scalable, easy-to-produce gas phase targets with a simple structure. With FELs, "single cluster imaging and simultaneous ion spectroscopy" makes possible experiments under extremely well defined initial conditions, because the size of the cluster and the FEL intensity can be extracted from the scattering images. For the first time large xenon clusters up to micron radius were generated. Their single cluster scattering images were analyzed for cluster morphology and traces of the ultrafast plasma built-up during the femtosecond FEL pulse. The simultaneously measured single cluster ion spectra yield unprecedented insight into the ion dynamics following the interaction. The results will feed both future experimental effort and theoretical modeling.

High-Resolution Experiments on Strong-Field Ionization of Atoms and Molecules - Test of Tunneling Theory, the Role of Doubly... High-Resolution Experiments on Strong-Field Ionization of Atoms and Molecules - Test of Tunneling Theory, the Role of Doubly Excited States, and Channel-Selective Electron Spectra (Hardcover, 1st ed. 2016)
Lutz Fechner
R2,877 Discovery Miles 28 770 Ships in 10 - 15 working days

In this thesis, the ionization of atoms and small molecules in strong laser fields is experimentally studied using a reaction microscope. The population of autoionizing doubly excited states in the laser fields is proven and a possible connection to the well-known dielectronic recombination processes is discussed. The fundamental process of tunnel ionization in strong laser fields is subject of investigation in a pump-probe experiment with ultrashort laser pulses. A coherent superposition of electronic states in singly charged argon ions is created within the first, and subsequently tunnel-ionized with the second pulse. This gives access to state-selective information about the tunneling process and allows to test common models. Moreover, the ionization of krypton and argon at different wavelengths is studied, from the multiphoton to the tunneling regime. The wavelength-dependent investigations are furthermore extended to molecular hydrogen. In addition to ionization, this system might undergo different dissociative processes. Channel-selective electron momentum distributions are presented and compared to each other.

Topological Microfluidics - Nematic Liquid Crystals and Nematic Colloids in Microfluidic Environment (Hardcover, 2013 ed.):... Topological Microfluidics - Nematic Liquid Crystals and Nematic Colloids in Microfluidic Environment (Hardcover, 2013 ed.)
Anupam Sengupta
R3,467 Discovery Miles 34 670 Ships in 12 - 19 working days

This work represents one of the first comprehensive attempts to seamlessly integrate two highly active interdisciplinary domains in soft matter science - microfluidics and liquid crystals (LCs). Motivated by the lack of fundamental experiments, Dr. Sengupta initiated systematic investigation of LC flows at micro scales, gaining new insights that are also suggestive of novel applications. By tailoring the surface anchoring of the LC molecules and the channel dimensions, different topological constraints were controllably introduced within the microfluidic devices. These topological constraints were further manipulated using a flow field, paving the way for Topological Microfluidics. Harnessing topology on a microfluidic platform, as described in this thesis, opens up capabilities beyond the conventional viscous-dominated microfluidics, promising potential applications in targeted delivery and sorting systems, self-assembled motifs, and novel metamaterial fabrications.

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