Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility.
Rev Sci Instrum
; 90(12): 125113, 2019 Dec 01.
Article
de En
| MEDLINE
| ID: mdl-31893795
ABSTRACT
The use of x-ray diffraction (XRD) measurements in laser-driven dynamic compression experiments at high-power laser facilities is becoming increasingly common. Diffraction allows one to probe in situ the transformations occurring at the atomic level at extreme conditions of pressure, temperature, and time scale. In these measurements, the x-ray source is generated by irradiation of a solid foil. Under certain laser drive conditions, quasimonochromatic He-α radiation is generated. Careful analysis of the x-ray source plasma spectra reveals that this radiation is not a single line emission and that monochromaticity is highly dependent on the laser irradiance. In this work, we analyze how the spectra emitted by laser-irradiated copper, germanium, and iron foils at the Omega Laser vary depending on different laser drive conditions and discuss the implications for XRD experiments.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
Rev Sci Instrum
Année:
2019
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique