(Top, from left to right) Experimental setup for the intense laser pulse - solid target interaction. Particle-In-Cell simulation of wedge target irradiated by a laser pulse with a relativistic intensity. Target chamber for the isochoric heating of solid with an intense X-ray FEL beam.
(Bottom, from left to right) ALS beamline for the time-resolved X-ray absorption spectroscopy of Warm Dense Matter. Time-energy resolved broadband 70ps X-ray pulse transmitted a laser heated diamond film (A single shot image obtained using an X-ray streak camera)

Welcome to Byoung-ick Cho’s High Energy Density Physics and Ultrafast X-ray (HEDP-UFX) laboratory at the Department of Physics and Photon Science at Gwangju Institute of Science and Technology (GIST). 

The Universe is a dynamic and energetic place. Our research is concerned with measuring and controlling energetic events in the high energy density (HED, > 1011 J/m3) states on the length and time scale of atomic and molocular motion (nanometers, femtoseconds and shorter) using ultrafast and short-wavelength light sources. Our interest spans the area of plasma, condensed matter physics, high intensity laser and X-ray sciences. Common threads are to create HED condition (extreme temperature and pressure) via intense lasers and/or X-rays, probe them using ultrafast optical and X-ray techniques. Not only we focus on understanding fundamental physics about how materials behave under such extreme conditions and how this matter interacts with photons and other particles, but also we try to apply new findings to various fields, such as fusion research, astrophysics, and medical applications. We also develop new technologies related to ultrafast lasers, X-ray sources, and ultrafast detectors.

  • Paper accepted B. I. Cho et al, "Observation of Reverse Saturable Absorption of an X-ray Laser", Physical Review Letters
    Posted Jul 17, 2017, 11:51 PM by Byoung-ick Cho
  • Yang, Seonghyeok joins our group. Welcome.
    Posted May 7, 2017, 11:35 PM by Byoung-ick Cho
  • Paper accepted M. A. Beckwith, et al. "Imaging at an x-ray absorption edge using free electron laser pulses for interface dynamics in high energy density systems", Review of Scientific Instruments
    Posted Apr 12, 2017, 2:04 PM by Byoung-ick Cho
  • Yap Chuin Hong has joined the lab. Welcome
    Posted Mar 2, 2017, 6:49 PM by Byoung-ick Cho
  • Paper accepted Minju Kim, et al, "Impurity diagnosis of a KSTAR graphite divertor tile using laser induced breakdown spectroscopy technique", J. Nuclear Materials
    Posted Feb 21, 2017, 9:39 PM by Byoung-ick Cho
Showing posts 1 - 5 of 22. View more »

Positions available
We are hiring postdocs and students (Ph.D, master and undergraduate).
If you are interested in joining us, please contact Byoung-ick Cho.

Byoung-ick Cho (조병익)
office: GIST college C #313
email: bicho (at) gist.ac.kr
phone: +82-62-715-2879