HyoJung Hyun

TL;DR: The Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL) in South Korea has now entered operation with a timing jitter of just 20 fs.

TL;DR: PAL-XFEL as mentioned in this paper, a 1-nm hard X-ray free-electron laser (FEL) facility based on a 10-GeV S-band linear accelerator (LINAC), is achieved in Pohang, Korea by the end of 2016.

TL;DR: In this article, a self-seeded X-ray free-electron laser (XFEL) was demonstrated at the Pohang Accelerator Laboratory XFEL with a peak brightness of 3.2 × 1035 photons.

TL;DR: The observations demonstrate the unique capability of measuring the atomistic evolution during the entire lattice compression and release processes at unprecedented time and strain rate.

TL;DR: The formation of an intermediate new diffraction peak is observed that forms 50 ps after laser excitation and persists beyond 500 ps and has implications for the use of ultrafast lasers for ablation during pulsed laser deposition.