Frequency-resolved~x-ray~scattering

POSTER

Abstract

In a series of experiments at the LINAC Coherent Light Source (LCLS), the time-resolved x-ray scattering (TRXS) from molecular iodine was measured after excitation by an 800 nm, 520 nm, and a combination of 800 and 520 nm laser pulses. The measured TRXS is used to generate a frequency scattering spectrum by taking a temporal Fourier transform along the laser-pump-xray-probe delay axis. This is known as frequency-resolved x-ray scattering (FRXS). Using FRXS, vibrational and dissociative motion are separated in the spectrum allowing for the easy characterization of motion. An overview of FRXS measurements will be presented. For dissociations, velocities and initial positions are measured, and for vibrations, the equilibrium position, amplitude of motion, and beat frequency are measured.

*This research is supported through the Stanford PULSE Institute, SLAC National Accelerator Laboratory by the U.S. Department of Energy, Office of Basic Energy Sciences, Atomic, Molecular, and Optical Science Program. Use of the LINAC Coherent Light Source (LCLS), SLAC National Accelerator Laboratory is supported by the U.S. Department of Energy, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.

Authors

  • Noor Al-Sayyad

    • Department of Physics at Stanford University, PULSE Institute
    • PULSE Institute, Stanford University

  • Matthew Ware

    • Department of Physics at Stanford University, PULSE Institute
    • PULSE Institute, Stanford University

  • J. Michael Glownia

    • LINAC Coherent Light Source, SLAC National Laboratory
    • Linac Coherent Light Source - SLAC National Accelerator Laboratory
    • LCLS, SLAC National Accelerator Laboratory

  • Jordan O'Neal

    • Department of Physics at Stanford University, PULSE Institute
    • Department of Physics, Stanford University; Stanford PULSE Institute, SLAC National Accelerator Laboratory

  • Philip Bucksbaum

    • Department of Physics, Applied Physics, and Photon Science at Stanford University, PULSE Institute
    • PULSE Institute, Stanford Universitiy/SLAC