Single-Shot Coherent X-ray Imaging Instrument at PAL-XFEL
Daeho Sung, Daewoong Nam, Myong‐Jin Kim, Seonghan Kim, Kyung Sook Kim, Sang‐Youn Park, Sun Min Hwang, Chulho Jung, Heemin Lee, Do Hyung Cho, Minseok Kim, Intae Eom, Su Yong Lee, Changyong Song, Sangsoo Kim
Abstract
We developed a single-shot coherent X-ray imaging instrument at the hard X-ray beamline of the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL). This experimental platform was established to conduct a variety of XFEL experiments, including coherent diffraction imaging (CDI), X-ray photon correlation spectroscopy (XPCS), and coherent X-ray scattering (CXS). Based on the forward-scattering geometry, this instrument utilizes a fixed-target method for sample delivery. It is well optimized for single-shot-based experiments in which one expects to observe the ultrafast phenomena of nanoparticles at picosecond temporal and nanometer spatial resolutions. In this paper, we introduce a single-shot coherent X-ray imaging instrument and report pump–probe coherent diffraction imaging (PPCDI) of Ag nanoparticles as an example of its applications.