The chemRIXS Instrument for the LCLS-II X-Ray Free Electron Laser

TL;DR

The chemRIXS instrument at LCLS-II enhances time-resolved soft X-ray spectroscopy for solution-phase systems, enabling studies of dilute samples with higher signal quality and opening new research possibilities.

Contribution

Introduction of the chemRIXS instrument at LCLS-II, leveraging high-repetition-rate X-ray flux for advanced liquid sample spectroscopy.

Findings

First LCLS-II commissioning results presented.

Significant flux improvement enables studies on dilute systems.

New soft X-ray spectroscopies on liquids are now feasible.

Abstract

The chemRIXS instrument at the Linac Coherent Light Source offers new opportunities for studying solution-phase systems with time-resolved soft X-ray spectroscopy through the recently commissioned high-repetition-rate LCLS-II X-ray free electron laser. The orders-of-magnitude X-ray flux improvement provided by the superconducting accelerator, combined with corresponding advances in the optical laser system and the liquid jet recirculation system, enables studies on dilute systems with high signal-to-noise compared to what was possible with the LCLS-I copper accelerator. These capabilities open up time-resolved X-ray absorption spectroscopy and resonant inelastic X-ray scattering to entirely new classes of samples, as well as enabling the development of new soft X-ray spectroscopies on liquid samples. An overview of the beamline components and the first LCLS-II commissioning results are presented.