Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Claude Chenais-Popovics"'
Autor:
Jean-Raphael Marques, S. Bastiani-Ceccotti, L. Lecherbourg, F. Thais, N. Kontogiannopoulos, I. Matsushima, Stylianos Tzortzakis, Olivier Peyrusse, Claude Chenais-Popovics
Publikováno v:
Journal de Physique IV (Proceedings). 133:957-962
X and XUV spectra of Xe and Kr were measured in a gas jet irradiated by a 400 J energy, 1.5 ns duration laser pulse. Simultaneously, the plasma was diagnosed by electronic and ionic Thomson scattering. The XUV spectra were time-resolved with a differ
Autor:
S. Bastiani-Ceccotti, S. Gary, Patrick Audebert, Ronnie Shepherd, P. Renaudin, J. C. Gauthier, J. P. Geindre, F. Girard, I. Matsushima, Stylianos Tzortzakis, V. Nagels, Olivier Peyrusse, Claude Chenais-Popovics
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 99:614-626
The ionization and recombination dynamics of transient aluminum plasmas was measured using point projection K-shell absorption spectroscopy. An aluminum plasma was produced with a subpicosecond beam of the 100-TW laser at the LULI facility and probed
Autor:
Ronnie Shepherd, J. P. Geindre, S. Gary, Claude Chenais-Popovics, P. Renaudin, S. Bastiani-Ceccotti, P. Audebert, Stellios Tzortzakis, Olivier Peyrusse, V. Nagels-Silvert, J. C. Gauthier, I. Matsushima, F. Girard
Publikováno v:
Journal de Physique IV (Proceedings). 127:125-129
Nous avons mesure le spectre d'absorption en couche K de plasmas d'aluminium a haute densite. Deux faisceaux de la chaine laser femtoseconde 100 TW du LULI (de duree 300 fs) ont ete utilises pour produire le plasma absorbant sur une feuille mince d'A
Autor:
Franck Gilleron, Claude Chenais-Popovics, Klaus Eidmann, F. Thais, Thomas Blenski, S. Bastiani
Publikováno v:
Journal de Physique IV (Proceedings). 127:119-124
La mesure des coefficients d'absorption dans les plasmas chauds est particulierement utile dans le domaine de la fusion par confinement inertiel ainsi que dans divers contextes en astrophysique. Le developpement des calculs de physique atomique qui y
Autor:
Franck Gilleron, Claude Chenais-Popovics, M. Poirier, F. Thais, J.C. Gauthier, Thomas Blenski, K. Eidman, W. Fölsner, S. Bastiani
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 81:473-485
Increasing the range of plasma parameters accessible for laboratory absorption coefficients measurements is of interest for astrophysical applications. Aluminum is of special interest as its 1s–2p inner shell absorption transitions permit one to pr
Autor:
Jacques Bauche, A. Bachelier, J. C. Gauthier, C. Bauche-Arnoult, Olivier Peyrusse, Claude Chenais-Popovics, K. B. Fournier
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 81:47-55
The method of superconfiguration (SC) temperatures is used for interpreting the experimental spectrum of a non-LTE xenon plasma with kT e =450 eV and n e =1.2×10 20 cm −3 . 109 SCs are selected for representing the eight relevant ions. The coeffic
Autor:
Marta Fajardo, J. P. Geindre, Carlos A. Iglesias, J. C. Gauthier, Ronnie Shepherd, P. T. Springer, Stephen J. Moon, P. Audebert, Claude Chenais-Popovics, Forrest J. Rogers
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 71:711-719
Preliminary experiments using a long pulse laser generated X-ray source to back-light a short pulse laser heated thin foil have been performed at the Laboratoire pour l'Utilisation des Lasers Intenses (LULI) at Ecole Polytechnique in France. In these
Autor:
Marta Fajardo, Franck Gilleron, F. Thais, Jacques Bauche, A. Bachelier, C. Bauche-Arnoult, Klaus Eidmann, Thomas Blenski, F. Perrot, J.C. Gauthier, Claude Chenais-Popovics, W. Fölsner
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 71:249-256
Mixtures of light and mid- Z elements have been used to measure the absorption of the mid- Z element Ni, the temperature is inferred from the K-shell absorption of the light element Al. Here we test this method by comparing the temperatures deduced f
Autor:
Marta Fajardo, Klaus Eidmann, Hamed Merdji, Franck Gilleron, W. Fölsner, O. Henrot, Claude Chenais-Popovics, J.C. Gauthier
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 69:217-229
Time-resolved K-shell spectroscopy of an X-ray driven boron sample is reported. A small cavity irradiated by two frequency-doubled Nd:glass laser beams is used as an X-ray heating source, allowing to reach electron temperatures in the 10–25 eV rang
Autor:
Claude Chenais-Popovics, P. Renaudin, Richard Shepherd, H. Yashiro, P. Audebert, Marta Fajardo, J. C. Gauthier
Publikováno v:
Physical Review Letters. 86:1231-1234
The ion-distribution dynamics of an expanding aluminum plasma produced by a nanosecond laser pulse at moderate intensity (10(13) W cm(-2)) is studied by point-projection x-ray absorption spectroscopy with unprecedented, picosecond, time resolution. W