TY - JOUR
T1 - X-ray emission and transport in gold plasmas generated by 351-nm laser irradiation
AU - Nishimura, H.
AU - Takabe, H.
AU - Kondo, K.
AU - Endo, T.
AU - Shiraga, H.
AU - Sugimoto, K.
AU - Nishikawa, T.
AU - Kato, Y.
AU - Nakai, S.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1991
Y1 - 1991
N2 - Emission and transport characteristics of sub-keV x rays in laser-produced gold plasmas are investigated. Absolute x-ray spectra under three different experimental conditions have been measured with high spectral resolution to study dependences of x-ray emission on laser incidence angles, irradiation intensity, and thickness of a foil target. Simulations by a one-dimensional hydrodynamic code, which incorporates a detailed atomic physics, replicate quite well the general x-ray emission features obtained in the experiments. There remain, however, discrepancies in some details of spectral shapes, notably in the range between 0.5 and 0.9 keV. It is also shown that the transport of radiation heat wave deduced from x-ray emissions at the front and the rear sides of a thin gold foil may be interpreted by the self-similar solutions presented by Pakula and Sigel [Phys. Fluids. 28, 232 (1985); 29, 1340 (E) (1986)] with an approximated gold opacity under local thermodynamic equilibrium.
AB - Emission and transport characteristics of sub-keV x rays in laser-produced gold plasmas are investigated. Absolute x-ray spectra under three different experimental conditions have been measured with high spectral resolution to study dependences of x-ray emission on laser incidence angles, irradiation intensity, and thickness of a foil target. Simulations by a one-dimensional hydrodynamic code, which incorporates a detailed atomic physics, replicate quite well the general x-ray emission features obtained in the experiments. There remain, however, discrepancies in some details of spectral shapes, notably in the range between 0.5 and 0.9 keV. It is also shown that the transport of radiation heat wave deduced from x-ray emissions at the front and the rear sides of a thin gold foil may be interpreted by the self-similar solutions presented by Pakula and Sigel [Phys. Fluids. 28, 232 (1985); 29, 1340 (E) (1986)] with an approximated gold opacity under local thermodynamic equilibrium.
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U2 - 10.1103/PhysRevA.43.3073
DO - 10.1103/PhysRevA.43.3073
M3 - Article
AN - SCOPUS:0000722656
SN - 1050-2947
VL - 43
SP - 3073
EP - 3085
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
ER -