MEASUREMENTS OF RADIAL HEAT-WAVE PROPAGATION IN LASER-PRODUCED EXPLODING-FOIL PLASMAS

Authors
MONTGOMERY DS LANDEN OL DRAKE RP ESTABROOK KG BALDIS HA BATHA SH BRADLEY KS PROCASSINI RJ
Citation
Ds. Montgomery et al., MEASUREMENTS OF RADIAL HEAT-WAVE PROPAGATION IN LASER-PRODUCED EXPLODING-FOIL PLASMAS, Physical review letters, 73(15), 1994, pp. 2055-2058
Citations number
31
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
73
Issue
15
Year of publication
1994
Pages
2055 - 2058
Database
ISI
SICI code
0031-9007(1994)73:15<2055:MORHPI>2.0.ZU;2-R
Abstract
Time-resolved, 2D images of x-ray emission from thin, laser-irradiated titanium foils are presented. The foils are irradiated with 0.35 mu m light at intensities of 1 x 10(15) W/cm(2) which produces a plasma wi th electron densities less than or equal to 10(22) cm(-3) and electron temperature of 3-4 keV. X-ray emission that is characteristic of the thermal heat front is observed to propagate radially outward from the heated region. Comparison of these measurements with 2D hydrodynamic s imulations of the experiment suggests the radial heat flux to be about 3% of the free-streaming heat flux.