Measurement of the dispersion of thermal ion-acoustic fluctuations in high-temperature laser plasmas using multiple-wavelength Thomson scattering |
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Authors: | Froula D H Davis P Divol L Ross J S Meezan N Price D Glenzer S H Rousseaux C |
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Affiliation: | L-399, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA. froula1@llnl.gov |
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Abstract: | The dispersion of ion-acoustic fluctuations has been measured using a novel technique that employs multiple color Thomson-scattering diagnostics to measure the frequency spectrum for two separate thermal ion-acoustic fluctuations with significantly different wave vectors. The plasma fluctuations are shown to become dispersive with increasing electron temperature. We demonstrate that this technique allows a time resolved local measurement of electron density and temperature in inertial confinement fusion plasmas. |
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