Download or read book Using Collective X ray Thomson Scattering to Measure Temperature and Density of Warm Dense Matter written by and published by . This book was released on 2009 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collective x-ray Thomson scattering allows measuring plasmons, i.e electron plasma oscillations (Langmuir waves). This is manifest in the appearance of spectrally up- and down-shifted spectral features in addition to the Rayleigh signal. The ratio of the up- and down-shifted signals is directly related to detailed balance, allowing to determine the plasma temperature from first principles. The spectral shift of the plasmon signals is sensitive to temperature and electron density. We discuss the experimental considerations that have to be fulfilled to observe plasmon signals with x-ray Thomson scattering. As an example, we describe an experiment that used the Cl Ly-[alpha] x-ray line at 2.96 keV to measure collective Thomson scattering from solid beryllium, isochorically heated to 18 eV. Since temperature measurement based on detailed balance is based on first principles, this method is important to validate models that, for example, calculate the static ion-ion structure factor S{sub ii}(k).
Download or read book Demonstration of Successful X ray Thomson Scattering Using Picosecond K alpha X ray Sources for the Characterization of Dense Heated Matter written by and published by . This book was released on 2008 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss the first successful K-[alpha] x-ray Thomson scattering experiment from solid density plasmas for use as a diagnostic in determining the temperature, density, and ionization state of warm dense matter with picosecond resolution. The development of this source as a diagnostic and stringent requirements for successful K-[alpha] x-ray Thomson scattering are addressed. Data for the experimental techniques described in this paper [1] suggest the capability of single shot characterization of warm dense matter and the ability to use this scattering source at future Free Electron Lasers (FEL) where comparable scattering signal levels are predicted.
Download or read book X ray Thomson Scattering from Dense Plasmas written by and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in the development of laser-produced x-ray sources have enabled a new class of high-energy density physics experiments. Powerful narrow-bandwidth x rays penetrate through short-lived hot dense states of matter and probe the physical properties with spectrally resolved x-ray scattering. Experiments from isochorically-heated plasmas with electron densities in the range of solid density and above have been demonstrated allowing for the first time exploration of the microscopic properties of dense matter regime close to strongly-coupled and Fermi degenerate conditions. Backscatter measurements have accessed the non-collective Compton scattering regime, which provides accurate diagnostic information on the temperature, density and ionization states. The forward scattering spectrum has been shown to measure the collective plasmon oscillations. Besides extracting the standard plasma parameters, density and temperature, forward scattering yields new observables such as a direct measure of collisions, quantum effects and detailed balance. In this talk, we will discuss new results important for applications of this technique for novel experiments in a wide range of research areas such as inertial confinement fusion, radiation-hydrodynamics, material science, and laboratory astrophysics.
Download or read book X ray Thomson Scattering Measurements of Warm Dense Matter written by and published by . This book was released on 2012 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory of X ray Thomson Scattering in Warm Dense Matter written by Kathrin Wünsch and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulations of X ray Thomson Scattering from Warm Dense Matter written by Ghulam Shabbir Naz and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling X ray Thomson Scattering Spectra of Warm Dense Matter written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frontiers and Challenges in Warm Dense Matter written by Frank Graziani and published by Springer Science & Business. This book was released on 2014-04-28 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Simulations of X ray Thomson Scattering From Warm Dense Matter written by G. S. N. Naz and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X ray Thomson Scattering of Warm Dense Matter on the Z accelerator written by and published by . This book was released on 2013 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X ray Thomson Scattering of Warm Dense Matter on Z accelerator written by and published by . This book was released on 2011 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Measurement Through Detailed Balance in X ray Thomson Scattering written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The plasma conditions in isochorically heated beryllium are measured by x-ray Thomson scattering in the collective regime with a Cl Ly-[alpha] x-ray source at 2.96 keV. In addition to the down-shifted plasmon shape which provides electron density and temperature information, an up-shifted plasmon signal is observed allowing a model independent determination of the plasma temperature from the detailed balance relation.
Download or read book Progress in X ray Thomson Scattering of Warm Dense Matter on Z Accelerator written by and published by . This book was released on 2011 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Potential and Progress in X ray Thomson Scattering of Warm Dense Matter on the Z Accelerator written by and published by . This book was released on 2011 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Demonstration of Space resolved X ray Thomson Scattering Capability for Warm Dense Matter Experiments on the Z Accelerator written by and published by . This book was released on 2016 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments on the Sandia Z pulsed-power accelerator demonstrated the ability to produce warm dense matter (WDM) states with unprecedented uniformity, duration, and size, which are ideal for investigations of fundamental WDM properties. For the first time, space-resolved x-ray Thomson scattering (XRTS) spectra from shocked carbon foams were recorded on Z. The large (> 20 MA) electrical current produced by Z was used to launch Al flyer plates up to 25 km/s. The impact of the flyer plate on a CH2 foam target produced a shocked state with an estimated pressure of 0.75 Mbar, density of 0.52 g/cm3, and temperature of 4.3 eV. Both unshocked and shocked portions of the foam target were probed with 6.2 keV x-rays produced by focusing the Z-Beamlet laser onto a nearby Mn foil. The data is composed of three spatially distinct spectra that were simultaneously captured with a single spectrometer with high spectral (4.8 eV) and spatial (190 [mu]m) resolutions. Furthermore, these spectra provide detailed information on three target locations: the laser spot, the unshocked foam, and the shocked foam.
Download or read book Proceedings written by John von Neumann-Institut für Computing and published by Forschungszentrum Jülich. This book was released on 2012 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X ray Probing of Warm Dense Matter written by G. Shabbir Naz and published by LAP Lambert Academic Publishing. This book was released on 2010-09 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major challenges of contemporary physics is to understand the behavior of matter at extreme conditions of temperature, pressure, density and electromagnetic fields. It is relevant to many branches of physics like astrophysics, nuclear physics and quantum physics due to wide occurrence of such states of matter in the universe. Warm dense matter (WDM) defined by a temperature of few electron volts and densities comparable and greater than the solid density, occurs during the implosion phase of thermonuclear fusion and is a non-trivial problem to create and probe it. This book introduces the subject, briefly describe the available options to probe WDM and use spectrally resolved inelastic X-ray scattering method to demonstrate its potential use as a standard diagnostic technique. Three state of the art methods to create WDM are used to demonstrate its applications. The book would be beneficial for the students and researchers working in simulation codes to understand the complex systems occur in strongly correlated dense plasmas relevant to the planetary science, cold star physics and to the indirect driven inertial confinement fusion research.
