Fluorescence measurements of expanding strongly coupled neutral plasmas

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) to with a time resolution limit as small as 7 ns. Strong coupling in the plasma...

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Veröffentlicht in:	Physical review letters 2005-12, Vol.95 (23), p.235001.1-235001.4, Article 235001
Hauptverfasser:	CUMMINGS, E. A, DAILY, J. E, DURFEE, D. S, BERGESON, S. D
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY Atomic and molecular physics Atomic properties and interactions with photons Basic studies of specific kinds of plasmas CALCIUM Exact sciences and technology FLUORESCENCE ION TEMPERATURE LASERS Multicomponent and negative-ion plasmas Optical (ultraviolet, visible, infrared) measurements Optical cooling of atoms trapping PHOTOLUMINESCENCE Photon interactions with atoms Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges PLASMA PLASMA DENSITY Plasma diagnostic techniques and instrumentation PLASMA DIAGNOSTICS SIGNALS STRONG-COUPLING MODEL Strongly-coupled plasmas TIME RESOLUTION
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Zusammenfassung:	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) to 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.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.95.235001