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Possibility of plasma density diagnostics using Langmuir-wave-caused dips observed in dense laser plasmas |
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| Authors: | F S Krasniqi O Renner E Dalimier E Dufour R Schott E Förster |
| Institution: | 1. Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universit?t, Max-Wien-Platz 1, 07743, Jena, Germany 2. Institute of Physics, Academy of Sciences CR, Na Slovance 2, 18221, Prague, Czech Republic 3. Physique Atomique dans les Plasmas Denses, Laboratoire pour l'Utilisation des Lasers Intenses, CNRS-école Polytechnique-CEA-Université Paris VI, 75252 Paris Cedex 05 and, 91128, Palaiseau Cedex, France |
| Abstract: | A systematic study of the Langmuir-wave-caused dips (L dips) observed in profiles of the Al Ly γ line emitted from laser irradiated sandwich targets indicates that these fine spectral features can be used as a tool for density diagnostics in intermediately coupled plasmas. The spectroscopic data required for a reliable identification of L dips were collected by a vertical-geometry Johann spectrometer providing high spectral and spatial resolution. The electron densities deduced from the evolution of the L dips along the laser target axis compare well with those derived from hydrosimulations and from measurements of the line widths and shifts. |
| Keywords: | 32 70 Jz Line shapes widths and shifts 52 70 La X-ray and gamma-ray measurements |
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