scholarly journals X-ray Spectroscopies of High Energy Density Matter Created with X-ray Free Electron Lasers

2019 ◽  
Vol 9 (22) ◽  
pp. 4812 ◽  
Author(s):  
Byoung Ick Cho
Keyword(s):  
Energy Density ◽  
Free Electron ◽  
High Energy ◽  
Spectroscopic Studies ◽  
High Energy Density ◽  
Future Research ◽  
Spectroscopic Techniques ◽  
Free Electron Lasers ◽  
X Ray ◽  
Fundamental Properties

The recent progress in the development of X-ray free electron lasers (XFELs) allows for the delivery of over 1011 high-energy photons to solid-density samples in a femtosecond time scale. The corresponding peak brightness of XFEL induces a nonlinear response of matter in a short-wavelength regime. The absorption of an XFEL pulse in a solid also results in the creation of high energy density (HED) matter. The electronic structure and related fundamental properties of such HED matter can be investigated with the control of XFEL and various X-ray spectroscopic techniques. These experimental data provide unique opportunities to benchmark theories and models for extreme conditions and to guide further advances. In this article, the current progress in spectroscopic studies on intense XFEL–matter interactions and HED matter are reviewed, and future research opportunities are discussed.

scholarly journals Imaging at an x-ray absorption edge using free electron laser pulses for interface dynamics in high energy density systems

2017 ◽  
Vol 88 (5) ◽  
pp. 053501 ◽  
Author(s):  
M. A. Beckwith ◽  
S. Jiang ◽  
A. Schropp ◽  
A. Fernandez-Pañella ◽  
H. G. Rinderknecht ◽  
...  
Keyword(s):  
Energy Density ◽  
Absorption Edge ◽  
Free Electron ◽  
Free Electron Laser ◽  
Laser Pulses ◽  
High Energy ◽  
High Energy Density ◽  
Interface Dynamics ◽  
X Ray ◽  
X Ray Absorption

Observation of ultra-high energy density state with x-ray free electron laser SACLA

2020 ◽  
Vol 36 ◽  
pp. 100813
Author(s):  
Y. Maeda ◽  
Y. Hironaka ◽  
T. Iwasaki ◽  
K. Kawasaki ◽  
Y. Sakawa ◽  
...  
Keyword(s):  
Energy Density ◽  
Free Electron ◽  
Free Electron Laser ◽  
High Energy ◽  
High Energy Density ◽  
Ultra High Energy ◽  
X Ray ◽  
Density State

X-ray free-electron laser studies of dense plasmas

2015 ◽  
Vol 81 (5) ◽  
Author(s):  
Sam M. Vinko
Keyword(s):  
Free Electron ◽  
Theoretical Models ◽  
High Energy ◽  
High Energy Density ◽  
Future Research ◽  
X Ray ◽  
Dense Plasmas ◽  
Future Research Directions ◽  
Isochoric Heating ◽  
And Control

The high peak brightness of X-ray free-electron lasers (FELs), coupled with X-ray optics enabling the focusing of pulses down to sub-micron spot sizes, provides an attractive route to generating high energy-density systems on femtosecond time scales, via the isochoric heating of solid samples. Once created, the fundamental properties of these plasmas can be studied with unprecedented accuracy and control, providing essential experimental data needed to test and benchmark commonly used theoretical models and assumptions in the study of matter in extreme conditions, as well as to develop new predictive capabilities. Current advances in isochoric heating and spectroscopic plasma studies on X-ray FELs are reviewed and future research directions and opportunities discussed.

scholarly journals Novel experimental setup for megahertz X-ray diffraction in a diamond anvil cell at the High Energy Density (HED) instrument of the European X-ray Free-Electron Laser (EuXFEL)

2021 ◽  
Vol 28 (3) ◽  
pp. 688-706
Author(s):  
H. P. Liermann ◽  
Z. Konôpková ◽  
K. Appel ◽  
C. Prescher ◽  
A. Schropp ◽  
...  
Keyword(s):  
Energy Density ◽  
Free Electron ◽  
Free Electron Laser ◽  
High Energy ◽  
High Energy Density ◽  
X Ray Diffraction ◽  
Pump Probe ◽  
X Ray ◽  
Sample Chamber ◽  
Diamond Anvil

The high-precision X-ray diffraction setup for work with diamond anvil cells (DACs) in interaction chamber 2 (IC2) of the High Energy Density instrument of the European X-ray Free-Electron Laser is described. This includes beamline optics, sample positioning and detector systems located in the multipurpose vacuum chamber. Concepts for pump–probe X-ray diffraction experiments in the DAC are described and their implementation demonstrated during the First User Community Assisted Commissioning experiment. X-ray heating and diffraction of Bi under pressure, obtained using 20 fs X-ray pulses at 17.8 keV and 2.2 MHz repetition, is illustrated through splitting of diffraction peaks, and interpreted employing finite element modeling of the sample chamber in the DAC.

scholarly journals Demonstration of Geometric Effects and Resonant Scattering in the X-Ray Spectra of High-Energy-Density Plasmas

2021 ◽  
Vol 126 (8) ◽  
Author(s):  
G. Pérez-Callejo ◽  
E. V. Marley ◽  
D. A. Liedahl ◽  
L. C. Jarrott ◽  
G. E. Kemp ◽  
...  
Keyword(s):  
Energy Density ◽  
Resonant Scattering ◽  
High Energy ◽  
High Energy Density ◽  
X Ray ◽  
High Energy Density Plasmas ◽  
Geometric Effects
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