Spectroscopic characterization of an ultrashort-pulse-laser-driven Ar cluster target incorporating both Boltzmann and particle-in-cell models.
A model that solves simultaneously both the electron and atomic kinetics was used to generate a synthetic He alpha and satellite x-ray spectra to characterize a high intensity ultrashort laser driven Ar cluster target experiment. In particular, level populations were obtained from a detailed collisional-radiative model where collisional rates were computed from a time varying electron distribution function obtained from the solution of the zero-dimensional Boltzmann equation. In addition, a particle-in-cell simulation was used to model the laser interaction with the cluster target and provided the initial electron energy distribution function (EEDF) for the Boltzmann solver. This study suggests that a high density average, <Na>high, of 3.2 x 10(20) cm(-3) was held by the system for a time, delta tau, of 5.7 ps, and during this time the plasma was in a highly nonequilibrium state in both the EEDF and the ion level populations.
Sherrill
M E
ME
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Abdallah
J
J
Csanak
G
G
Dodd
E S
ES
Fukuda
Y
Y
Akahane
Y
Y
Aoyama
M
M
Inoue
N
N
Ueda
H
H
Yamakawa
K
K
Faenov
A Ya
AY
Magunov
A I
AI
Pikuz
T A
TA
Skobelev
I Yu
IY