Measurements of Electron Transport in Foils Irradiated with a Picosecond Time Scale Laser Pulse

作者：Brown C R D^*; Hoarty D J; James S F; Swatton D; Hughes S J; Morton J W; Guymer T M; Hill M P; Chapman D A; Andrew J E; Comley A J; Shepherd R; Dunn J; Chen H; Schneider M; Brown G; Beiersdorfer P; Emig J

来源：Physical Review Letters, 2011, 106(18): 185003.

DOI：10.1103/PhysRevLett.106.185003

The heating of solid foils by a picosecond time scale laser pulse has been studied by using x-ray emission spectroscopy. The target material was plastic foil with a buried layer of a spectroscopic tracer material. The laser pulse length was either 0.5 or 2 ps, which resulted in a laser irradiance that varied over the range 10(16)-10(19) W/cm(2). Time-resolved measurements of the buried layer emission spectra using an ultrafast x-ray streak camera were used to infer the density and temperature conditions as a function of laser parameters and depth of the buried layer. Comparison of the data to different models of electron transport showed that they are consistent with a model of electron transport that predicts the bulk of the target heating is due to return currents.

• 出版日期2011-5-6