WorldCat Identities

Redmer, Ronald

Overview
Works: 50 works in 86 publications in 2 languages and 583 library holdings
Genres: Conference papers and proceedings 
Roles: Author, Editor, Other, Contributor
Publication Timeline
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Most widely held works by Ronald Redmer
Metal-to-nonmetal transitions by Ronald Redmer( )

12 editions published in 2010 in English and held by 428 WorldCat member libraries worldwide

This book is devoted to nonmetal-to-metal transitions. The original ideas of Mott for such a transition in solids have been adapted to describe a broad variety of phenomena in condensed matter physics (solids, liquids, and fluids), in plasma and cluster physics, as well as in nuclear physics (nuclear matter and quark-gluon systems). The book gives a comprehensive overview of theoretical methods and experimental results of the current research on the Mott effect for this wide spectrum of topics. The fundamental problem is the
Frontiers and challenges in warm dense matter by Frank Graziani( )

9 editions published between 2014 and 2016 in English and held by 33 WorldCat member libraries worldwide

Warm Dense Matter (WDM) occupies a loosely defined region of phase space intermediate between solid, liquid, gas, and plasma, and typically shares characteristics of two or more of these phases. WDM is generally associated with the combination of strongly coupled ions and moderately degenerate electrons, and careful attention to quantum physics and electronic structure is essential. The lack of a small perturbation parameter greatly limits approximate attempts at its accurate description. Since WDM resides at the intersection of solid state and high energy density physics, many high energy density physics (HEDP) experiments pass through this difficult region of phase space. Thus, understanding and modeling WDM is key to the success of experiments on diverse facilities. These include the National Ignition Campaign centered on the National Ignition Facility (NIF), pulsed-power driven experiments on the Z machine, ion-beam-driven WDM experiments on the NDCX-II, and fundamental WDM research at the Linear Coherent Light Source (LCLS). Warm Dense Matter is also ubiquitous in planetary science and astrophysics, particularly with respect to unresolved questions concerning the structure and age of the gas giants, the nature of exosolar planets, and the cosmochronology of white dwarf stars. In this book we explore established and promising approaches to the modeling of WDM, foundational issues concerning the correct theoretical description of WDM, and the challenging practical issues of numerically modeling strongly coupled systems with many degrees of freedom
Physical properties of dense, low temperature plasmas by Ronald Redmer( Book )

3 editions published in 1997 in English and held by 11 WorldCat member libraries worldwide

Thermodynamische und Transporteigenschaften dichter Alkali-Plasmen by Ronald Redmer( Book )

4 editions published in 1991 in German and held by 7 WorldCat member libraries worldwide

Temperature Measurements of Dense Plasmas by Detailed Balance( )

1 edition published in 2006 in English and held by 6 WorldCat member libraries worldwide

Plasmas at high electron densities of n{sub e} = 10{sup 20} - 10{sup 26} cm{sup -3} and moderate temperatures T{sub e} = 1 - 20 eV are important for laboratory astrophysics, high energy density science and inertial confinement fusion. These plasmas are usually referred to as Warm Dense Matter (WDM) and are characterized by a coupling parameter of {Lambda} {approx}> 1 where correlations become important. The characterization of such plasmas is still a challenging task due to the lack of direct measurement techniques for temperatures and densities. They propose to measure the Thomson scattering spectrum of vacuum-UV radiation off density fluctuations in the plasma. Collective Thomson scattering provides accurate data for the electron temperature applying first principles. Further, this method takes advantage of the spectral asymmetry resulting from detailed balance and is independent of collisional effects in these dense systems
Time-Space Position of Warm Dense Matter in Laser Plasma Interaction Process( )

1 edition published in 2006 in English and held by 6 WorldCat member libraries worldwide

Laser plasma interaction experiments have been perform performed using an fs Titanium Sapphire laser. Plasmas have been generated from planar PMMA targets using single laser pulses with 3.3 mJ pulse energy, 50 fs pulse duration at 800 nm wavelength. Electron density distributions of the plasmas in different delay times have been characterized by means of Nomarski Interferometry. Experimental data were cautiously compared with relevant 1D numerical simulation. Finally these results provide a first experience of searching for the time-space position of the so-called warm dense plasma in an ultra fast laser target interaction process. These experiments aim to prepare near solid-density plasmas for Thomson scattering experiments using the short wavelength free-electron laser FLASH, DESY Hamburg
Thomson Scattering Measurements of Plasma Dynamics( )

1 edition published in 2006 in English and held by 5 WorldCat member libraries worldwide

The authors propose to investigate the dynamics of plasmas in the warm dense matter (WDM) regime on ultra-short time scales. Accessible plasma conditions are in the density range of n = 10{sup 20} - 10{sup 23} cm{sup -3} and at moderate temperatures of T = 1 - 20 eV. These plasmas are of importance for laboratory astrophysics, high energy density science and inertial confinement fusion. They are characterized by a coupling parameter of {Lambda} {approx}> 1, where electromagnetic interactions are of the same order as the kinetic energy. The high density of the plasma makes it opaque to radiation in the visible range and, as a consequence, UV up to x-ray radiation can be used to probe such systems. Therefore a wide range in the temperature-density plane of WDM is presently unexplored and only the VUV-FEL opens for the first time the opportunity for its detailed investigation. In equilibrium, the macroscopic state of the plasma is completely characterized by its density and temperature. In pump-probe experiments however, the plasma is initially in a nonequilibrium state and relaxes towards equilibrium within the relaxation time {tau}{sub R}. For t> {tau}{sub R}, the plasma is in an equilibrium state and expands hydrodynamically on a time scale {tau}{sub H}. The proposed experiment measures the time-resolved Thomson scattering signal with the VUV-FEL radiation characterizing the plasma in equilibrium and nonequilibrium states. Both regimes are extremely interesting and will provide new insight into the following phenomena: (1) details of nonequilibrium correlations, (2) relaxation phenomena, (3) hydrodynamic expansion, (4) recombination kinetics. The time-resolved Thomson scattering signal is obtained in a pump-probe experiment by varying the delay between pump and probe. The final stage of the relaxation process (t {approx} {tau}{sub R}) is of special interest since the plasma components (electrons and ion species) can be assumed to be in quasi-equilibrium. This allows for accurate measurements of the electron temperature using the detailed balance relation. For times t {approx}<{tau}{sub R} the scattering spectrum provides also the plasmon damping in nonequilibrium from which information on the formation and decay of collective excitations at short time scales can be obtained. At large time scales (t {approx}> {tau}{sub H}) the hydrodynamic expansion of the plasma sets in. Detailed information on the evolution of the plasma in this regime is available from sophisticated hydrodynamic computer simulations which can be tested with the proposed measurements. With the decreasing plasma density due to the expansion, recombination processes become important and need to be considered as well
Electronic Structure of Dense Plasmas by X-Ray Scattering( )

1 edition published in 2003 in English and held by 5 WorldCat member libraries worldwide

We present an improved analytical expression for the x-ray dynamic structure factor from a dense plasma which includes the effects of weakly bound electrons. This result can be applied to describe scattering from low to moderate Z plasmas, and it covers the entire range of plasma conditions that can be found in inertial confinement fusion experiments, from ideal to degenerate up to moderately coupled systems. We use our theory to interpret x-ray scattering experiments from solid density carbon plasma and to extract accurate measurements of electron temperature, electron density and charge state. We use our experimental results to validate various equation-of-state models for carbon plasmas
Electronic Structure Measurement of Solid Density Plasmas using X-Ray Scattering( )

1 edition published in 2003 in English and held by 5 WorldCat member libraries worldwide

We present an improved analytical expression for the x-ray dynamic structure factor from a dense plasma which includes the effects of weakly bound electrons. This result can be applied to describe scattering from low to moderate Z plasmas, and it covers the entire range of plasma conditions that can be found in inertial confinement fusion experiments, from ideal to degenerate up to moderately coupled systems. We use our theory to interpret x-ray scattering experiments from solid density carbon plasma and to extract accurate measurements of electron temperature, electron density and charge state. We use our experimental results to validate various equation-of-state models for carbon plasmas
Investigation of the Electronic Structure of Solid Density Plasmas by X-Ray Scattering( )

1 edition published in 2003 in English and held by 5 WorldCat member libraries worldwide

We present an improved analytical expression for the x-ray dynamic structure factor from a dense plasma which includes the effects of weakly bound electrons. This result can be applied to describe scattering from low to moderate Z plasmas, and it covers the entire range of plasma conditions that can be found in inertial confinement fusion experiments, from ideal to degenerate up to moderately coupled systems. We use our theory to interpret x-ray scattering experiments from solid density carbon plasma and to extract accurate measurements of electron temperature, electron density and charge state. We use our experimental results to validate various equation-of-state models for carbon plasmas
14th international conference on the physics of non-ideal plasmas : PNP-14, September 9-14, 2012, Rostock, Germany by International Conference on the Physics of Non-Ideal Plasmas( )

2 editions published in 2013 in English and held by 5 WorldCat member libraries worldwide

Zum Einfluß neutraler Bindungszustände auf die thermodynamischen und Transporteigenschaften im partiell ionisierten Zäsium-Plasma by Ronald Redmer( )

4 editions published between 1985 and 1986 in German and held by 4 WorldCat member libraries worldwide

High-pressure equations of state and phase diagrams of molecular H-C-N-O compounds by Mandy Bethkenhagen( Book )

2 editions published in 2016 in English and held by 4 WorldCat member libraries worldwide

The thermodynamic description of molecular systems composed of water, ammonia, and methane at high pressure up to 1 TPa is the subject of this thesis. The focus lies on the calculation of equations of state, phase diagrams, and their characterization by employing the quantum-statistical method density functional theory molecular dynamics. In particular superionic phases are investigated using evolutionary structure searching and the linear mixing approximation is validated. The obtained simulation results serve as input for modeling the interior structure of giant planets such as Uranus.<eng>
Physical properties of dense, low-temperature plasmas by Ronald Redmer( Book )

3 editions published in 1997 in English and held by 3 WorldCat member libraries worldwide

Berechnung der Struktureigenschaften dichter Plasmen mit der Classical-Map Hypernetted Chain Approximation by Richard Bredow( Book )

2 editions published in 2016 in German and held by 3 WorldCat member libraries worldwide

Warme dichte Materie ist durch hohe Temperaturen und Dichten charakterisiert und für die Modellierung von astrophysikalischen Objekten, aber auch der Trägheitsfusion von besonderem Interesse. Moderne Lasersysteme wie Freie-Elektronen-Laser ermöglichen es, mit Hilfe der Röngtenthomsonstreuung (XRTS) akkurate Diagnostik der Struktur und Thermodynamik von WDM durchzuführen. Diese Arbeit hat zum Ziel, auf Basis der Lösung der Ornstein-Zernike-Relation mittels der Classical-Map Hypernetted Chain Approximation (CHNC) Strukturanalysen und Rechnungen zur Thermodynamik durchzuführen und auszuwerten.<ger>
Evolution des Saturn auf der Basis von ab initio-Zustandsgleichungen by Robert Püstow( Book )

2 editions published in 2015 in German and held by 2 WorldCat member libraries worldwide

Die homogene Evolution des Saturn liefert ein Alter von 2-3 Gyr. Verglichen mit dem Sonnensystem (4.56 Gyr) ist dies zu kurz. Ich untersuchte den Einfluss unterschiedlicher Zustandsgleichungen für Wasserstoff, Helium und schwerere Elemente und den Effekt der H-He-Entmischung auf die innere Struktur und das Kühlungsverhalten des Saturn. Es konnte gezeigt werden, dass sich durch den Entmischungseffekt eine Schicht aus nahezu reinem Helium auf dem Planetenkern bildet. Die freiwerdende Gravitationsenergie verlangsamt den Kühlungsprozess.<ger>
Berechnung des dynamischen Strukturfaktors in warmer dichter Materie mit ab-initio-Simulationen by Kai-Uwe Plagemann( Book )

2 editions published in 2016 in German and held by 2 WorldCat member libraries worldwide

Die Charakterisierung von warmer dichter Materie stellt ein wichtiges Forschungsgebiet und eine große Herausforderung für Experimente und Theorie dar. Eine Möglichkeit der Darstellung bilden Röntgen-Thomsonstreuexperimente, aus deren Resultaten der dynamische Strukturfaktor gewonnen werden kann. Diese Arbeit hat das Ziel, diese Größe aus FT-DFT-MD-Simulationen zu erhalten, mit einer über die Störungstheorie hinausgehenden Behandlung der Quanten- und Korrelationseffekte. Die erhaltenen Strukturfaktoren werden mit anderen theoretischen Modellen und Experimenten für Beryllium und Bor verglichen.<ger>
Proceedings of the 9th International Workshop on the Physics of Nonideal Plasmas September 6-11, 1998, Rostock, Germany. ; reviewed papers by International Workshop on the Physics of Nonideal Plasmas( Book )

2 editions published in 1999 in English and held by 2 WorldCat member libraries worldwide

 
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Metal-to-nonmetal transitions
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Alternative Names
Redmer, R.

Redmer, R. 1958-

Redmer, R. (Ronald)

Languages
English (39)

German (17)