Possibility of plasma density diagnostics using Langmuir-wave-caused dips observed in dense laser plasmas
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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.
PACS.32.70.Jz Line shapes, widths, and shifts 52.70.La X-ray and gamma-ray measurements
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