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402 results on '"Dorchies, F"'

1. Understanding XANES spectra of two-temperature warm dense copper using ab initio simulation

Author

Jourdain, N., Recoules, V., Lecherbourg, L., Renaudin, P., and Dorchies, F.

Subjects
Condensed Matter - Materials Science, Physics - Plasma Physics
Abstract

Using ab initio molecular-dynamics simulations combined with linear-response theory, we studied the x-ray absorption near-edge spectra (XANES) of a two-temperature dense copper plasma. As the temperature increases, XANES spectra exhibit a pre-edge structure balanced by a reduction of the absorption just behind the edge. By performing systematic simulations for various thermodynamic conditions, we establish a formulation to deduce the electronic temperature Te directly from the spectral integral of the pre-edge that can be used for various thermodynamic conditions encountered in a femtosecond heating experiment where thermal non equilibrium and expanded states have to be considered., Comment: 9 pages, 10 figures submitted to Physical Review B

Published
2020
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2. Stabilizing a high-pressure phase in InSb at ambient conditions with a laser-driven pressure pulse

Author

Jarnac, A., Wang, Xiaocui, Bengtsson, A. U. J, Burza, M., Ekstrom, J. C., Enquist, H., Jurgilaitis, A., Kretzschmar, N., Persson, A. I. H., Tu, C. M., Wulff, M., Dorchies, F., and Larsson, J.

Subjects
Condensed Matter - Materials Science
Abstract

In this letter, we describe the stabilization of indium antimonide (InSb) in the high-pressure orthorhombic phase (InSb-III) at ambient conditions. Until now, InSb-III has only been observed above 9 GPa, or at around 3 GPa as a metastable structure during the phase transition from cubic zinc blende (InSb-I) to orthorhombic InSb-IV. The crystalline phase transition from InSb-I to InSb-III was driven by an ultrashort, laser-generated, non-hydrostatic pressure pulse. The transition occurred in preferred orientations locked to the initial orientation of the InSb-I crystal, breaking the symmetry of the InSb-I cubic cell to form the InSb-III orthorhombic cell.

Published
2017

3. Shock compression experiments using the DiPOLE 100-X laser on the high energy density instrument at the European x-ray free electron laser: Quantitative structural analysis of liquid Sn

Author

Gorman, M. G., primary, McGonegle, D., additional, Smith, R. F., additional, Singh, S., additional, Jenkins, T., additional, McWilliams, R. S., additional, Albertazzi, B., additional, Ali, S. J., additional, Antonelli, L., additional, Armstrong, M. R., additional, Baehtz, C., additional, Ball, O. B., additional, Banerjee, S., additional, Belonoshko, A. B., additional, Benuzzi-Mounaix, A., additional, Bolme, C. A., additional, Bouffetier, V., additional, Briggs, R., additional, Buakor, K., additional, Butcher, T., additional, Di Dio Cafiso, S., additional, Cerantola, V., additional, Chantel, J., additional, Di Cicco, A., additional, Clarke, S., additional, Coleman, A. L., additional, Collier, J., additional, Collins, G. W., additional, Comley, A. J., additional, Coppari, F., additional, Cowan, T. E., additional, Cristoforetti, G., additional, Cynn, H., additional, Descamps, A., additional, Dorchies, F., additional, Duff, M. J., additional, Dwivedi, A., additional, Edwards, C., additional, Eggert, J. H., additional, Errandonea, D., additional, Fiquet, G., additional, Galtier, E., additional, Laso Garcia, A., additional, Ginestet, H., additional, Gizzi, L., additional, Gleason, A., additional, Goede, S., additional, Gonzalez, J. M., additional, Harmand, M., additional, Hartley, N. J., additional, Heighway, P. G., additional, Hernandez-Gomez, C., additional, Higginbotham, A., additional, Höppner, H., additional, Husband, R. J., additional, Hutchinson, T. M., additional, Hwang, H., additional, Lazicki, A. E., additional, Keen, D. A., additional, Kim, J., additional, Koester, P., additional, Konopkova, Z., additional, Kraus, D., additional, Krygier, A., additional, Labate, L., additional, Lee, Y., additional, Liermann, H.-P., additional, Mason, P., additional, Masruri, M., additional, Massani, B., additional, McBride, E. E., additional, McGuire, C., additional, McHardy, J. D., additional, Merkel, S., additional, Morard, G., additional, Nagler, B., additional, Nakatsutsumi, M., additional, Nguyen-Cong, K., additional, Norton, A.-M., additional, Oleynik, I. I., additional, Otzen, C., additional, Ozaki, N., additional, Pandolfi, S., additional, Peake, D. J., additional, Pelka, A., additional, Pereira, K. A., additional, Phillips, J. P., additional, Prescher, C., additional, Preston, T. R., additional, Randolph, L., additional, Ranjan, D., additional, Ravasio, A., additional, Redmer, R., additional, Rips, J., additional, Santamaria-Perez, D., additional, Savage, D. J., additional, Schoelmerich, M., additional, Schwinkendorf, J.-P., additional, Smith, J., additional, Sollier, A., additional, Spear, J., additional, Spindloe, C., additional, Stevenson, M., additional, Strohm, C., additional, Suer, T.-A., additional, Tang, M., additional, Toncian, M., additional, Toncian, T., additional, Tracy, S. J., additional, Trapananti, A., additional, Tschentscher, T., additional, Tyldesley, M., additional, Vennari, C. E., additional, Vinci, T., additional, Vogel, S. C., additional, Volz, T. J., additional, Vorberger, J., additional, Walsh, J. P. S., additional, Wark, J. S., additional, Willman, J. T., additional, Wollenweber, L., additional, Zastrau, U., additional, Brambrink, E., additional, Appel, K., additional, and McMahon, M. I., additional

Published
2024
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4. Melting of iron close to Earth's inner core boundary conditions and beyond

Author

Harmand, M., Ravasio, A., Mazevet, S., Bouchet, J., Denoeud, A., Dorchies, F., Feng, Y., Fourment, C., Galtier, E ., Gaudin, J., Guyot, F., Kodama, R., Koenig, M., Lee, H. J., Miyanishi, K., Morard, G., Musella, R., Nagler, B., Nakatsutsumi, M., Ozaki, N., Recoules, V., Toleikis, S., Vinci, T., Zastrau, U., Zhu, D., and Benuzzi-Mounaix, A.

Subjects
Physics - Geophysics, Condensed Matter - Materials Science
Abstract

Several important geophysical features such as heat flux at the Core-Mantle Boundary or geodynamo production are intimately related with the temperature profile in the Earth's core. However, measuring the melting curve of iron at conditions corresponding to the Earth inner core boundary under pressure of 330 GPa has eluded scientists for several decades. Significant discrepancies in previously reported iron melting temperatures at high pressure have called into question the validity of dynamic measurements. We report measurements made with a novel approach using X-ray absorption spectroscopy using an X-ray free electron laser source coupled to a laser shock experiment. We determine the state of iron along the shock Hugoniot up to 420 GPa (+/- 50) and 10800 K (+/- 1390) and find an upper boundary for the melting curve of iron by detecting solid iron at 130 GPa and molten at 260, 380 and 420 GPa along the shock Hugoniot. Our result establishes unambiguous agreement between dynamic measurement and recent extrapolations from static data thus resolving the long-standing controversy over the reliability of using dynamic compression to study the melting of iron at conditions close to the Earth's inner core boundary and beyond., Comment: 9 pages 3 figures

Published
2014

5. $\mathrm{CO_2}$ exploding clusters dynamics probed by XUV fluorescence

Author

Negro, M., Ruf, H., Fabre, B., Dorchies, F., Devetta, M., Staedter, D., Vozzi, C., Mairesse, Y., and Stagira, S.

Subjects
Physics - Atomic and Molecular Clusters
Abstract

Clusters excited by intense laser pulses are a unique source of warm dense matter, that has been the subject of intensive experimental studies. The majority of those investigations concerns atomic clusters, whereas the evolution of molecular clusters excited by intense laser pulses is less explored. In this work we trace the dynamics of $\mathrm{CO_2}$ clusters triggered by a few-cycle 1.45-$\mu$m driving pulse through the detection of XUV fluorescence induced by a delayed 800-nm ignition pulse. Striking differences among fluorescence dynamics from different ionic species are observed.

Published
2014
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12. Experimental study of fast electron propagation in compressed matter

Author

Vauzour, B., Santos, J.J., Batani, D., Baton, S.D., Koenig, M., Nicolaï, Ph., Perez, F., Beg, F.N., Benedetti, C., Benocci, R., Brambrink, E., Chawla, S., Coury, M., Dorchies, F., Fourment, C., Galimberti, M., Gizzi, L.A., Heathcote, R., Higginson, D.P., Honrubia, J.J., Hulin, S., Jafer, R., Jarrot, L.C., Labate, L., Lancaster, K., Köster, P., MacKinnon, A.J., McKenna, P., McPhee, A.G., Nazarov, W., Pasley, J., Ramis, R., Rhee, Y., Regan, C., Ribeyre, X., Richetta, M., Serres, F., Schlenvoigt, H.-P., Schurtz, G., Sgattoni, A., Spindloe, C., Vaisseau, X., Volpe, L., and Yahia, V.

Published
2011
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21. X-ray spectroscopy diagnostic of a plasma produced by femtosecond laser pulses irradiating a cluster target

Author

Skobelev, I. Yu., Faenov, A. Ya., Magunov, A. I., Pikuz, T. A., Boldarev, A. S., Gasilov, V. A., Abdallach, Jr., J., Junkel-Vives, G. C., Auguste, T., Dobosz, S., d’Oliveira, P., Hulin, S., Monot, P., Blasco, F., Dorchies, F., Caillaud, T., Bonte, C., Stenz, C., Salin, F., Loboda, P. A., Litvinenko, I. A., Popova, V. V., Baidin, G. V., and Sharkov, B. Yu.

Published
2002
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28. X-ray absorption near edge spectroscopy study of warm dense MgO

Author

(0000-0003-0881-5733) Bolis, R., (0000-0002-1860-0982) Hernandez, J.-A., Recoules, V., (0000-0002-2660-7543) Guarguaglini, M., (0000-0002-5922-9585) Dorchies, F., Jourdain, N., Ravasio, A., (0000-0002-1595-1752) Vinci, T., Brambrink, E., Ozaki, N., Bouchet, J., Remus, F., Musella, R., Mazevet, S., (0000-0002-6268-2436) Hartley, N., Guyot, F., Benuzzi-Mounaix, A., (0000-0003-0881-5733) Bolis, R., (0000-0002-1860-0982) Hernandez, J.-A., Recoules, V., (0000-0002-2660-7543) Guarguaglini, M., (0000-0002-5922-9585) Dorchies, F., Jourdain, N., Ravasio, A., (0000-0002-1595-1752) Vinci, T., Brambrink, E., Ozaki, N., Bouchet, J., Remus, F., Musella, R., Mazevet, S., (0000-0002-6268-2436) Hartley, N., Guyot, F., and Benuzzi-Mounaix, A.

Abstract

We report time-resolved X-ray Absorption Near Edge Spectroscopy (XANES) measurements of warm dense MgO. We used a high power nanosecond pulse to drive a strong uniform shock wave into an MgO sample, and a picosecond pulse to generate a broadband X-ray source near the Mg K-edge. We used this setup to obtain XANES spectra across a large area of the phase diagram, with densities up to 6.8 g/cc and temperatures up to 30 000 K, conditions at which no prior investigations of electronic and ionic structure exist. Our XANES results, together with quantum molecular dynamic simulations, demonstrate that the sample metallizes due to the bandgap closure as it melts, after which it shows typical behavior for a disordered ionic liquid.

Published
2019

33. X-ray absorption near edge spectroscopy study of warm dense MgO

Author

Bolis, R., primary, Hernandez, J.-A., additional, Recoules, V., additional, Guarguaglini, M., additional, Dorchies, F., additional, Jourdain, N., additional, Ravasio, A., additional, Vinci, T., additional, Brambrink, E., additional, Ozaki, N., additional, Bouchet, J., additional, Remus, F., additional, Musella, R., additional, Mazevet, S., additional, Hartley, N. J., additional, Guyot, F., additional, and Benuzzi-Mounaix, A., additional

Published
2019
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39. Unraveling resistive versus collisional contributions to relativistic electron beam stopping power in cold-solid and in warm-dense plasmas

Author

Vauzour, B, Debayle, A, Vaisseau, X, Hulin, S, Schlenvoigt, H, Batani, D, Baton, S, Honrubia, J, Nicolai, P, Beg, F, Benocci, R, Chawla, S, Coury, M, Dorchies, F, Fourment, C, D'Humieres, E, Jarrot, L, Mckenna, P, Rhee, Y, Tikhonchuk, V, Volpe, L, Yahia, V, Santos, J, Vauzour B., Debayle A., Vaisseau X., Hulin S., Schlenvoigt H. -P., Batani D., Baton S. D., Honrubia J. J., Nicolai Ph., Beg F. N., Benocci R., Chawla S., Coury M., Dorchies F., Fourment C., D'Humieres E., Jarrot L. C., McKenna P., Rhee Y. J., Tikhonchuk V. T., Volpe L., Yahia V., Santos J. J., Vauzour, B, Debayle, A, Vaisseau, X, Hulin, S, Schlenvoigt, H, Batani, D, Baton, S, Honrubia, J, Nicolai, P, Beg, F, Benocci, R, Chawla, S, Coury, M, Dorchies, F, Fourment, C, D'Humieres, E, Jarrot, L, Mckenna, P, Rhee, Y, Tikhonchuk, V, Volpe, L, Yahia, V, Santos, J, Vauzour B., Debayle A., Vaisseau X., Hulin S., Schlenvoigt H. -P., Batani D., Baton S. D., Honrubia J. J., Nicolai Ph., Beg F. N., Benocci R., Chawla S., Coury M., Dorchies F., Fourment C., D'Humieres E., Jarrot L. C., McKenna P., Rhee Y. J., Tikhonchuk V. T., Volpe L., Yahia V., and Santos J. J.

Abstract

We present results on laser-driven relativistic electron beam propagation through aluminum samples, which are either solid and cold or compressed and heated by laser-induced shock. A full numerical description of fast electron generation and transport is found to reproduce the experimental absolute K-alpha yield and spot size measurements for varying target thicknesses, and to sequentially quantify the collisional and resistive electron stopping powers. The results demonstrate that both stopping mechanisms are enhanced in compressed Al samples and are attributed to the increase in the medium density and resistivity, respectively. For the achieved time-and space-averaged electronic current density, < j(h)> similar to 8 x 10(10) A/cm(2) in the samples, the collisional and resistive stopping powers in warm and compressed Al are estimated to be 1.5 keV/mu m and 0.8 keV/mu m, respectively. By contrast, for cold and solid Al, the corresponding estimated values are 1.1 keV/mu m and 0.6 keV/mu m. Prospective numerical simulations involving higher j(h) show that the resistive stopping power can reach the same level as the collisional one. In addition to the effects of compression, the effect of the transient behavior of the resistivity of Al during relativistic electron beam transport becomes progressively more dominant, and for a significantly high current density, j(h) similar to 10(12) A/cm(2), cancels the difference in the electron resistive stopping power (or the total stopping power in units of areal density) between solid and compressed samples. Analytical calculations extend the analysis up to j(h) = 10(14) A/cm(2) (representative of the full-scale fast ignition scenario of inertial confinement fusion), where a very rapid transition to the Spitzer resistivity regime saturates the resistive stopping power, averaged over the electron beam duration, to values of similar to 1 keV/mu m. (C) 2014 AIP Publishing LLC.

Published
2014

40. Experimental characterization of fast electron stopping power in dense media ranging from solid to warm and dense matter

Author

Santos, J, Hulin, S, Vauzour, B, Vaisseau, X, Batani, D, Bouilleaud, R, Deneuville, F, Dorchies, F, Feugeas, J, Fourment, C, D'Humieres, E, Nicolai, P, Tikhonchuk, V, Touati, M, Debayle, A, Honrubia, J, Gremillet, L, Ceccotti, T, Floquet, V, Benocci, R, Morace, A, Veltcheva, M, Volpe, L, Baton, S, Perez, F, Schlenvoigt, H, Yahia, V, Beg, F, Chawla, S, Jarrot, L, Peebles, J, Sawada, H, Sorokovikova, A, Wei, M, Fedosejevs, R, Kerr, S, Coury, M, Gray, R, Mckenna, P, Li, K, Davies, J, Rhee, Y, Mclean, H, Patel, P, Santos J. J., Hulin S., Vauzour B., Vaisseau X., Batani D., Bouilleaud R., Deneuville F., Dorchies F., Feugeas J. -L., Fourment C., D'Humieres E., Nicolai Ph., Tikhonchuk V. T., Touati M., Debayle A., Honrubia J. J., Gremillet L., Ceccotti T., Floquet V., Benocci R., Morace A., Veltcheva M., Volpe L., Baton S. D., Perez F., Schlenvoigt H. -P., Yahia V., Beg F. N., Chawla S., Jarrot L. C., Peebles J., Sawada H., Sorokovikova A., Wei M., Fedosejevs R., Kerr S., Coury M., Gray R., McKenna P., Li K., Davies J. R., Rhee Y., McLean H., Patel P., Santos, J, Hulin, S, Vauzour, B, Vaisseau, X, Batani, D, Bouilleaud, R, Deneuville, F, Dorchies, F, Feugeas, J, Fourment, C, D'Humieres, E, Nicolai, P, Tikhonchuk, V, Touati, M, Debayle, A, Honrubia, J, Gremillet, L, Ceccotti, T, Floquet, V, Benocci, R, Morace, A, Veltcheva, M, Volpe, L, Baton, S, Perez, F, Schlenvoigt, H, Yahia, V, Beg, F, Chawla, S, Jarrot, L, Peebles, J, Sawada, H, Sorokovikova, A, Wei, M, Fedosejevs, R, Kerr, S, Coury, M, Gray, R, Mckenna, P, Li, K, Davies, J, Rhee, Y, Mclean, H, Patel, P, Santos J. J., Hulin S., Vauzour B., Vaisseau X., Batani D., Bouilleaud R., Deneuville F., Dorchies F., Feugeas J. -L., Fourment C., D'Humieres E., Nicolai Ph., Tikhonchuk V. T., Touati M., Debayle A., Honrubia J. J., Gremillet L., Ceccotti T., Floquet V., Benocci R., Morace A., Veltcheva M., Volpe L., Baton S. D., Perez F., Schlenvoigt H. -P., Yahia V., Beg F. N., Chawla S., Jarrot L. C., Peebles J., Sawada H., Sorokovikova A., Wei M., Fedosejevs R., Kerr S., Coury M., Gray R., McKenna P., Li K., Davies J. R., Rhee Y., McLean H., and Patel P.

Published
2012

41. The HiPER project for inertial confinement fusion and some experimental results on advanced ignition schemes

Author

Batani, D, Koenig, M, Baton, S, Perez, F, Gizzi, L, Koester, P, Labate, L, Honrubia, J, Antonelli, L, Morace, A, Volpe, L, Santos, J, Schurtz, G, Hulin, S, Ribeyre, X, Fourment, C, Nicolai, P, Vauzour, B, Gremillet, L, Nazarov, W, Pasley, J, Richetta, M, Lancaster, K, Spindloe, C, Tolley, M, Neely, D, Kozlová, M, Nejdl, J, Rus, B, Wolowski, J, Badziak, J, Dorchies, F, BATANI, DINO DIMITRI, VOLPE, LUCA, Dorchies, F., Batani, D, Koenig, M, Baton, S, Perez, F, Gizzi, L, Koester, P, Labate, L, Honrubia, J, Antonelli, L, Morace, A, Volpe, L, Santos, J, Schurtz, G, Hulin, S, Ribeyre, X, Fourment, C, Nicolai, P, Vauzour, B, Gremillet, L, Nazarov, W, Pasley, J, Richetta, M, Lancaster, K, Spindloe, C, Tolley, M, Neely, D, Kozlová, M, Nejdl, J, Rus, B, Wolowski, J, Badziak, J, Dorchies, F, BATANI, DINO DIMITRI, VOLPE, LUCA, and Dorchies, F.

Abstract

This paper presents the goals and some of the results of experiments conducted within the Working Package 10 (Fusion Experimental Programme) of the HiPER Project. These experiments concern the study of the physics connected to 'advanced ignition schemes', i.e. the fast ignition and the shock ignition approaches to inertial fusion. Such schemes are aimed at achieving a higher gain, as compared with the classical approach which is used in NIF, as required for future reactors, and make fusion possible with smaller facilities. In particular, a series of experiments related to fast ignition were performed at the RAL (UK) and LULI (France) Laboratories and studied the propagation of fast electrons (created by a short-pulse ultra-high-intensity beam) in compressed matter, created either by cylindrical implosions or by compression of planar targets by (planar) laser-driven shock waves. A more recent experiment was performed at PALS and investigated the laser-plasma coupling in the 10 16 W cm -2 intensity regime of interest for shock ignition. © 2011 IOP Publishing Ltd.

Published
2011

42. Extending Plasma Accelerators: Guiding with Capillary Tubes

Author

Cros, B., Courtois, C., Malka, G., Matthieussent, G., Marques, J. R., Dorchies, F., Amiranoff, F., Rebibo, S., Hamoniaux, G., Blanchot, N., and Miquel, J. L.

Subjects
Plasma waves -- Research, Laser beams -- Diffraction, Plasma accelerators -- Usage, Waveguides -- Analysis, Business, Chemistry, Electronics, Electronics and electrical industries
Abstract

In order to extend plasma accelerators, the laser beam has to be guided inside gas or plasma over a distance of the order of the dephasing length, which is typically much larger than the diffraction length [z.sub.R] of the laser. A capillary tube can be used as a waveguide for high-intensity laser pulses over distances well in excess of [z.sub.R]. Experimental demonstration of monomode guiding over 100 [z.sub.R] of [10.sup.16] W/[cm.sup.2] pulses has been obtained in evacuated capillary tubes (45-70-[micro]m inner diameter). A drop of transmission has been observed when the intensity of the amplified spontaneous emission (ASE) is high enough to ionize the capillary tube entrance. Propagation in helium gas-filled (10-40 mbar) capillary tubes has been studied at intensities up to [10.sup.16] W/[cm.sup.2]; a plasma column with on-axis density of the order of [10.sup.17] [cm.sup.-3] has been created on a length of the order of 4 cm. The use of a capillary tube for an extended accelerator is discussed for the case of linear, resonant excitation of plasma waves by laser wakefield. Index Terms--Guiding, plasma accelerator.

Published
2000

43. Metallization of warm dense SiO$_2$ studied by XANES spectroscopy

Author

Denoeud, A., Benuzzi-Mounaix, A., Ravasio, A., Dorchies, F., Leguay, P. M., Gaudin, J., Guyot, F., Brambrink, E., Koenig, M., Le Pape, S., Mazevet, S., Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Énergie Matériaux Télécommunications - INRS (EMT-INRS), Institut National de la Recherche Scientifique [Québec] (INRS)-Université du Québec à Montréal = University of Québec in Montréal (UQAM), Airbus Group Innovations [Suresnes], Airbus [France], Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS), Institute for Academic Initiatives, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), ANR-12-BS04-0015,PlanetLab,Propriètés des planètes et des exoplanètes en laboratoire(2012), ANR-09-BLAN-0206,OEDYP(2009), Université Paris-Saclay-Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Institut National de la Recherche Scientifique [Québec] (INRS)-Université du Québec à Montréal (UQAM), Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
[PHYS]Physics [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], PACS numbers: 71.30.+h, 31.15.ae, 52.25.Os, 52.50.Lp, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; We investigate the evolution of the electronic structure of fused silica in a dense plasma regime using time-resolved x-ray absorption spectroscopy. We use a nanosecond (ns) laser beam to generate a strong uniform shock wave in the sample and a picosecond (ps) pulse to produce a broadband x-ray source near the Si $K$ edge. By varying the delay between the two laser beams and the intensity of the ns beam, we explore a large thermodynamical domain with densities varying from 1 to 5 g/cm$^3$ and temperatures up to 5 eV. In contrast to normal conditions where silica is a well-known insulator with a wide band gap of 8.9 eV, we find that shocked silica exhibits a pseudogap as a semimetal throughout this thermodynamical domain. This is in quantitative agreement with density functional theory predictions performed using the generalized gradient approximation.

Published
2014

46. X-ray emission spectroscopy of well-characterised non-LTE plasmas

Author

Bourgaux, A C, primary, Bastiani-Ceccotti, S, additional, Audebert, P, additional, Marquès, J R, additional, Vassura, L, additional, Vinci, T, additional, Dorchies, F, additional, Leguay, P M, additional, Chung, H K, additional, Bowen, C, additional, Dervieux, V, additional, Renaudin, P, additional, Silvert, V, additional, and Jacquemot, S, additional

Published
2016
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47. Proton radiography of cylindrical laser-driven implosions

Author

Volpe, L., Jafer, R., Vauzour, B., Nicolai, Ph, Santos, J. J., Dorchies, F., Fourment, C., Hulin, S., Regan, C., Perez, F., Baton, S., Lancaster, K., Galimberti, M., Heathcote, R., Tolley, M., Spindloe, Ch, Nazarov, W., Koester, P., Labate, L., Gizzi, L. A., Benedetti, C., Sgattoni, A., Richetta, M., Pasley, J., Beg, F. N., Chawla, S., Higginson, D. P., Mackinnon, A., MacPhee, A. G., Batani, D., Dipartimento di Fisica 'Giuseppe Occhialini' = Department of Physics 'Giuseppe Occhialini' [Milano-Bicocca], Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Pôle Fromager AOP du Massif Central, Critical Care Department, Hospital de Sabadell, CIBER Enfermedades Respiratorias, Laboratoire pour l'utilisation des lasers intenses (LULI), Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des matériaux avancés (LMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Central Laser Facility (CLF), STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC), Science and Technology Facilities Council (STFC), University of St Andrews [Scotland], Istituto Nazionale di Ottica (INO), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Intense Laser Irradiation Laboratory–IPCF, Area della Ricerca CNR, Dipartimento di Energia [Milano], Politecnico di Milano [Milan] (POLIMI), International Institute of Clinical Studies, Lawrence Livermore National Laboratory (LLNL), Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), and Consiglio Nazionale delle Ricerche (CNR)

Subjects
[PHYS]Physics [physics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2011

48. Time evolution of electron structure in femtosecond heated warm dense molybdenum

Author

Dorchies, F., primary, Recoules, V., additional, Bouchet, J., additional, Fourment, C., additional, Leguay, P. M., additional, Cho, B. I., additional, Engelhorn, K., additional, Nakatsutsumi, M., additional, Ozkan, C., additional, Tschentscher, T., additional, Harmand, M., additional, Toleikis, S., additional, Störmer, M., additional, Galtier, E., additional, Lee, H. J., additional, Nagler, B., additional, Heimann, P. A., additional, and Gaudin, J., additional

Published
2015
Full Text
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50. X-ray absorption spectroscopy of iron at multimegabar pressures in laser shock experiments

Author

Harmand, M., primary, Ravasio, A., additional, Mazevet, S., additional, Bouchet, J., additional, Denoeud, A., additional, Dorchies, F., additional, Feng, Y., additional, Fourment, C., additional, Galtier, E., additional, Gaudin, J., additional, Guyot, F., additional, Kodama, R., additional, Koenig, M., additional, Lee, H. J., additional, Miyanishi, K., additional, Morard, G., additional, Musella, R., additional, Nagler, B., additional, Nakatsutsumi, M., additional, Ozaki, N., additional, Recoules, V., additional, Toleikis, S., additional, Vinci, T., additional, Zastrau, U., additional, Zhu, D., additional, and Benuzzi-Mounaix, A., additional

Published
2015
Full Text
View/download PDF

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