Keywords

fluorescence, photoluminescence, plasma density, plasma diagnostics, calcium, plasma temperature

Abstract

We report new detailed density profile measurements in expanding strongly coupled neutral calcium plasmas. Using laser-induced fluorescence techniques, we determine plasma densities in the range of 10^5 to 10^9 cm^-3 with a time resolution limit as small as 7 ns. Strong coupling in the plasma ions is inferred directly from the fluorescence signals. Evidence for strong coupling at late times is presented, confirming a recent theoretical result.

Original Publication Citation

E. A. Cummings, J. E. Daily, D. S. Durfee, and S. D. Bergeson, “Fluorescence measurement of expanding strongly-coupled neutral plasmas,” Physical Review Letters, 95, 2351 (25). The original publication of this article can be found at http://link.aps.org/doi/1.113/PhysRevLett.95.2351