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Title: Temperature and electron density measurements on laser driven radiative shocks

Abstract

In this paper, new results on radiative shocks generated by a high power laser in a xenon gas cell are presented. Several shock parameters were measured: temperature, radial expansion and velocity, as well as the electron density in the radiative precursor and its velocity. Multiple laser shot allowed the investigation of physical trends changing initial conditions (laser energy and initial gas pressure). Results are compared with one- and two-dimensional radiative hydrodynamic simulations. The experiments were carried out at the LULI Laboratory.

Authors:
; ; ; ; ; ; ; ;  [1];  [2];  [2];  [2];  [2];  [2];  [3]
  1. Laboratoire pour l'Utilisation des Lasers Intenses, UMR7605, CNRS-CEA-Universite Paris VI-Ecole Polytechnique, 91128 Palaiseau (France)
  2. (France)
  3. (Italy)
Publication Date:
OSTI Identifier:
20782420
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 13; Journal Issue: 1; Other Information: DOI: 10.1063/1.2162804; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; ELECTRON DENSITY; ELECTRON TEMPERATURE; ION TEMPERATURE; LASERS; LIGHT TRANSMISSION; PLASMA; PLASMA DENSITY; PLASMA DIAGNOSTICS; PLASMA SIMULATION; PLASMA WAVES; SHOCK WAVES; VELOCITY; XENON

Citation Formats

Vinci, T., Koenig, M., Benuzzi-Mounaix, A., Michaut, C., Boireau, L., Leygnac, S., Bouquet, S., Peyrusse, O., Batani, D., LUTH, Observatoire de Paris, 92195 Meudon, LUTH, Observatoire de Paris, 92195 Meudon, France and DPTA, CEA-DIF, BP 12, 91680 Bruyeres-le-Chatel, LUTH, Observatoire de Paris, 92195 Meudon, DPTA, CEA-DIF, BP 12, 91680 Bruyeres-le-Chatel, CELIA, UMR 5107 Universite Bordeaux 1-CEA-CNRS, 33405 Talence, and Dipartimento di Fisica 'G. Occhialini', Universita di Milano-Bicocca, Piazza della Scienza 3, 20126 Milan. Temperature and electron density measurements on laser driven radiative shocks. United States: N. p., 2006. Web. doi:10.1063/1.2162804.
Vinci, T., Koenig, M., Benuzzi-Mounaix, A., Michaut, C., Boireau, L., Leygnac, S., Bouquet, S., Peyrusse, O., Batani, D., LUTH, Observatoire de Paris, 92195 Meudon, LUTH, Observatoire de Paris, 92195 Meudon, France and DPTA, CEA-DIF, BP 12, 91680 Bruyeres-le-Chatel, LUTH, Observatoire de Paris, 92195 Meudon, DPTA, CEA-DIF, BP 12, 91680 Bruyeres-le-Chatel, CELIA, UMR 5107 Universite Bordeaux 1-CEA-CNRS, 33405 Talence, & Dipartimento di Fisica 'G. Occhialini', Universita di Milano-Bicocca, Piazza della Scienza 3, 20126 Milan. Temperature and electron density measurements on laser driven radiative shocks. United States. doi:10.1063/1.2162804.
Vinci, T., Koenig, M., Benuzzi-Mounaix, A., Michaut, C., Boireau, L., Leygnac, S., Bouquet, S., Peyrusse, O., Batani, D., LUTH, Observatoire de Paris, 92195 Meudon, LUTH, Observatoire de Paris, 92195 Meudon, France and DPTA, CEA-DIF, BP 12, 91680 Bruyeres-le-Chatel, LUTH, Observatoire de Paris, 92195 Meudon, DPTA, CEA-DIF, BP 12, 91680 Bruyeres-le-Chatel, CELIA, UMR 5107 Universite Bordeaux 1-CEA-CNRS, 33405 Talence, and Dipartimento di Fisica 'G. Occhialini', Universita di Milano-Bicocca, Piazza della Scienza 3, 20126 Milan. Sun . "Temperature and electron density measurements on laser driven radiative shocks". United States. doi:10.1063/1.2162804.
@article{osti_20782420,
title = {Temperature and electron density measurements on laser driven radiative shocks},
author = {Vinci, T. and Koenig, M. and Benuzzi-Mounaix, A. and Michaut, C. and Boireau, L. and Leygnac, S. and Bouquet, S. and Peyrusse, O. and Batani, D. and LUTH, Observatoire de Paris, 92195 Meudon and LUTH, Observatoire de Paris, 92195 Meudon, France and DPTA, CEA-DIF, BP 12, 91680 Bruyeres-le-Chatel and LUTH, Observatoire de Paris, 92195 Meudon and DPTA, CEA-DIF, BP 12, 91680 Bruyeres-le-Chatel and CELIA, UMR 5107 Universite Bordeaux 1-CEA-CNRS, 33405 Talence and Dipartimento di Fisica 'G. Occhialini', Universita di Milano-Bicocca, Piazza della Scienza 3, 20126 Milan},
abstractNote = {In this paper, new results on radiative shocks generated by a high power laser in a xenon gas cell are presented. Several shock parameters were measured: temperature, radial expansion and velocity, as well as the electron density in the radiative precursor and its velocity. Multiple laser shot allowed the investigation of physical trends changing initial conditions (laser energy and initial gas pressure). Results are compared with one- and two-dimensional radiative hydrodynamic simulations. The experiments were carried out at the LULI Laboratory.},
doi = {10.1063/1.2162804},
journal = {Physics of Plasmas},
number = 1,
volume = 13,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}
  • No abstract prepared.
  • We present a method to infer the electron temperature in argon plasmas using a collisional-radiative model for argon ions and measurements of electron density to interpret absolutely calibrated spectroscopic measurements of argon ion (Ar II) line intensities. The neutral density, and hence the degree of ionization of this plasma, can then be estimated using argon atom (Ar I) line intensities and a collisional-radiative model for argon atoms. This method has been tested for plasmas generated on two different devices at the University of Texas at Austin: the helicon experiment and the helimak experiment. We present results that show good correlationmore » with other measurements in the plasma.« less
  • The velocity, temperature, and electron number density profiles were measured in the electrode wall boundary layer of a combustion driven MHD generator. Both subsonic and supersonic conditions were run. The experimental results are compared with predictions of a two-dimensional turbulent boundary-layer computation. For the subsonic condition, high levels of freestream turbulence were measured, about 10-12 percent. The measured velocity profile was fatter than that predicted, although the temperature and electron number density profiles were in agreement. This difference is tentatively ascribed to the high freestream turbulence levels. There was no measurable MHD effect for the subsonic case. For the supersonicmore » condition, the measured velocity, temperature, and electron number density profiles fell under the predicted profiles. The discrepancy may be due to three-dimensional recirculation effects. There was a small amount of MHD interaction, the degree of which was in agreement with predictions. Electron number density nonequilibrium was not identified, but the degree of nonequilibrium predicted was small. Under the appropriate supersonic conditions, primarily at freestream temperatures below 2400K, ionization nonequilibrium is predicted to occur.« less
  • Laser driven shock waves propagating through foam targets have been diagnosed by side-on time-resolved x-ray absorption spectroscopy. {ital K}-shell absorption spectra of chlorine, doped into the foam targets, were matched to a detailed atomic physics model to infer the temperature profile. The density distribution was obtained from the x-ray transmission through the target. 2D radiation-hydrodynamic modeling of the targets reproduced the experimental results. Preheating of material by radiation from the shocked region was shown to have an important contribution to the measured temperature profile. {copyright} {ital 1997} {ital The American Physical Society}