Emission mechanism for the silicon He-α lines in a photoionization experiment

Han, Bo; Wang, Feilu; Salzmann, David; Zhong, Jiayong; Zhao, Gang

doi:10.1017/hpl.2020.49

Cited by 3 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…X-ray self-emission or backlight imaging is a basic diagnostic method for characterizing the plasma state and its evolutionary behavior in the fields of high-energy-density physics (HEDP), inertial confinement fusion and laboratory astrophysics [1,2] . The development of a high-spatial resolution Kα flash radiography method is of great scientific significance to the diagnostics of the spatial distribution of small-sized dense plasma, such as hot-spot self-emission and plasma density [3] .…”

Section: Introductionmentioning

confidence: 99%

High-resolution X-ray flash radiography of Ti characteristic lines with multilayer Kirkpatrick–Baez microscope at the Shenguang-II Update laser facility

Zhang

Huang

et al. 2021

High Pow Laser Sci Eng

View full text Add to dashboard Cite

High-resolution X-ray flash radiography of Ti characteristic lines with a multilayer Kirkpatrick-Baez microscope was developed on the Shenguang-II Update (SG-Ⅱ Update) laser facility. The microscope uses an optimized multilayer design of Co/C and W/C stacks to obtain a high reflection efficiency of the Ti characteristic lines while meeting the precise alignment requirement at the Cu Kα line. The alignment method based on dual simulated balls was proposed herein, which simultaneously realizes an accurate indication of the center field of view and the backlighter position. The optical design, multilayer coatings, and alignment method of the microscope and the experimental result of Ti flash radiography of the Au-coned CH shell target on the SG-II Update are described.

show abstract

Section: Introductionmentioning

confidence: 99%

High-resolution X-ray flash radiography of Ti characteristic lines with multilayer Kirkpatrick–Baez microscope at the Shenguang-II Update laser facility

Zhang

Huang

et al. 2021

High Pow Laser Sci Eng

View full text Add to dashboard Cite

show abstract

Theoretical evaluation of excitation cross section and fluorescence polarization of a solid-density Si plasma

Chen

2022

Physics of Plasmas

View full text Add to dashboard Cite

In this article, a fully relativistic approach is proposed to precisely predict the electronic structures, spectral properties, cross sections, and degrees of linear polarization of light emitted after excitation of plasma-embedded ions by electron impact, taking into account the plasma shielding effects on the atomic structures and collision dynamics, in addition to the contributions of Breit interaction and quantum electrodynamics effects. The scheme employs the effective shielding potential deduced from a solution of Poisson equation, based on the self-consistent field ion-sphere simulations to explain the interactions among the charged particles, where the perturbation correlation Dirac–Coulomb Hamiltonian is constructed. The simple and understandable form makes it a good substitute for complex self-consistent field calculation. As an illustrative example, a comparative investigation regarding the influences of different plasma temperature and density parameters on the level energies, transition rates, integrated total/magnetic sublevel cross sections, and linear polarizations of the radiation following electron-impact excitation of Si XIII (a solid-density Si plasma) is carried out. Numerical results show that the plasma density effect can significantly affect the atomic structures and collision cross sections, yet has limited influence on the polarization characteristics. A comparison of our calculations with other results, when available, is made. The advanced approach presented here not only opens a novel window for exploring the atomic dynamics processes in hot and/or dense plasmas, but also provides important information about polarization of the line emission. This study is beneficial for the high energy density physics, laser-produced plasmas, and astrophysical applications.

show abstract