Construction and Operation Plan for the Second Hard X-ray Beamline at PAL-XFEL

Abstract

The second hard X-ray beamline (HX2) at PAL-XFEL (Pohang Accelerator Laboratory X-ray Free Electron Laser) is currently in progress for construction to meet the increasing demands of researchers in various fields. With higher electron beam energy and a larger undulator parameter K, HX2 can deliver over twice the FEL intensity of the existing hard X-ray beamline (HX1) in the photon energy range of 2 to 7 keV. Consequently, HX1 will operate within the electron beam energy range of 7 to 10.5 GeV, providing FELs from 6.5 to 20 keV when both HX1 and HX2 are operated simultaneously. Most of the components have already been designed and prepared, enabling us to start construction as scheduled. Following this construction, we have also the upgrade plan for advanced operation of new extreme X-ray sources such as attosecond X-ray pulses and TW (1012 W, terawatt) scale X-ray pulses. In this report, we will introduce about construction and future upgrade plan of HX2 at PAL-XFEL.