X-Ray Diffraction from a Dense Plasma

Abstract

We report measurements of x-ray scattering cross sections for dense plasmas created by subjecting aluminum foils to strong laser-driven shocks. A narrow cone of quasimonochromatic x-rays at approximately 4.75 keV was used to probe the shocked part of the foil and scattered photons were detected with a CCD camera. The scattering cross section shows a clear peak, indicating diffraction from the plasma. Analysis and simulation of the data suggest that radiative heating and electron-ion energy exchange are important factors in the plasma production.

Standard of Molecular Dynamics Modeling and Simulation of Relaxation in Dense Media

“…The obtained precision is enough for comparison by an order of magnitude. The results of such extrapolation correlate with the experimental data [16].…”

Coupled mode effects on energy transfer in weakly coupled, two-temperature plasmas

“…We start with the quantum Lennard-Balescu equation for the electron distribution f e (p, t) in homogeneous and isotropic plasmas [27] ∂ ∂t f e (p, t) = 1 h i dp ′ (2πh) 3 dp (2πh) 3 dp ′ (2πh) 3 V…”

“…For instance, x-ray scattering allows not only for the measurement of equation of state data (like in traditional shock wave experiments, see, e.g., Refs. [1,2]), but also to obtain structural, dynamic, and collective properties of matter [3,4,5,6,7]. With these new possibilities, one is now able to probe the physics of high energy density matter as it is encountered during inertial confinement fusion or in the interior of planets.…”

Observations of Plasmons in Warm Dense Matter

“…Therefore, new and precise techniques [3][4][5][6][7] that make use of x rays to penetrate dense or compressed materials are broadly applicable in the dense matter community, e.g., [8,[10][11][12][13][14][15][16][17]. Recently, spectrally-resolved xray scattering has been demonstrated in dense plasmas [18] allowing accurate measurements of the electron velocity distribution function, temperature, and ionization state.…”