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Review articles on our research
Review articles on our research
Warm dense matter
Warm dense matter
Warm Dense Matter (WDM) occupies a unique regime between condensed matter and plasma, with temperatures ranging from planetary interiors to stellar cores (10,000–100,000 K) and near-solid densities. This exotic state is prevalent throughout the universe and plays a key role in inertial confinement fusion, planetary science, and materials under extreme conditions.
We generate and diagnose WDM using femtosecond lasers, XFELs, and laboratory X-ray sources, enabling access to atomic length and ultrafast time scales. Our work focuses on understanding non-equilibrium electron and ion dynamics, energy transport, and phase transitions in WDM, combining precision experiments with first-principles simulations and machine learning for quantitative interpretation.
Find more information from the following articles.
- G. Kang et al, App. Surf. Sci. (2025)
- J. W. Lee, M. J. Kim, et al, PRL (2021)
- B. I. Cho, et al, Sci. Rep. 6, 18843 (2016)
- B. I. Cho, et al, PRL 106, 167601 (2011)
Intense laser plasmas
Intense laser plasmas
Ultra-intense laser pulses can create relativistic plasmas that are hotter than stellar cores and exhibit highly nonlinear behaviors. These plasmas generate energetic electrons, bright X-rays, and ion beams, opening pathways for both fundamental plasma physics and novel radiation sources.
Using ultra-intense laser systems at CoReLS and tailored targets, we explore particle acceleration, plasma transport, radiation generation, and relativistic plasma phenomena. Our approach integrates PW-class laser experiments with kinetic and radiation-hydrodynamics simulations, advancing both basic understanding and applications.
Find more information from the following articles.
- L. J. Bae, et al. OE (2023)
- L. J. Bae, et al. OE 26, 6294 (2018)
- B. I. Cho, et al. PRE 80, 055402 (2009)
- B. I. Cho, et al. PoP 15, 052701 (2008)
XFEL science
XFEL science
X-ray free-electron lasers (XFELs) have revolutionized high energy density (HED) science by enabling the creation and ultrafast probing of matter at extreme conditions. XFELs can heat samples to millions of degrees while providing femtosecond, high-brightness X-ray pulses for diffraction, scattering, spectroscopy, and imaging.
Our group uses facilities including PAL-XFEL, European XFEL, and LCLS to study ultrafast structural and electronic dynamics, nonlinear X-ray–matter interactions, and X-ray heating of solids into WDM/HDM states. These experiments are coupled with advanced modeling to gain quantitative insight into strongly driven and non-equilibrium plasmas.
Find more information from the following articles.
- J. W. Lee, M. J. Kim, et al, PRL (2021)
- B. I. Cho, et al, PRL 119, 075002 (2017)
- B. I. Cho, et al, PRL 109, 245003 (2012)
- S. M. Vinko, et al. Nature 482, 59-62 (2012)
Plasma atomic physics
Plasma atomic physics
Atomic processes in dense, hot plasmas govern radiation properties, ionization dynamics, and energy transport, playing a crucial role in both astrophysical and laboratory plasmas. We study non-local thermodynamic equilibrium (NLTE) plasmas using atomic kinetics codes, radiation transfer models, and laser/XFEL-driven experiments.
By computing opacities, emission and absorption spectra, and ionization distributions with advanced codes and benchmarking them against experiments, we aim to improve predictive capabilities for radiative transport and diagnostics in HED and astrophysical environments.
Find more information from the following articles.
- J. H. Sohn, et al, Results in Physics (2025)
- M. S. Cho, et al, Phys. Rev. E (2024)
- M. S. Cho, et al, JQSRT (2020)
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