Journal Article

PUBDB-2018-01732

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Towards ultrafast dynamics with split-pulse X-ray photon correlation spectroscopy at free electron laser sources

Roseker, W. (Corresponding author)DESY* ; Hruszkewycz, S. O. ; Lehmkühler, F.DESY* ; Walther, M.DESY* ; Schulte-Schrepping, H.DESY* ; LEE, S.Extern* ; Osaka, T.Extern* ; Strüder, L. ; Hartmann, R. ; Sikorski, M.XFEL.EU* ; Song, S.Extern* ; Robert, A.Extern* ; Fuoss, P. H. ; Sutton, M. ; Stephenson, G. B. ; Grübel, G.DESY*

2018
Nature Publishing Group London

This record in other databases:        

Please use a persistent id in citations: doi:10.1038/s41467-018-04178-9  doi:10.3204/PUBDB-2018-01732

Abstract: One of the important challenges in condensed matter science is to understand ultrafast, atomic-scale fluctuations that dictate dynamic processes in equilibrium and non-equilibrium materials. Here, we report an important step towards reaching that goal by using a state-of-the-art perfect crystal based split-and-delay system, capable of splitting individual X-ray pulses andintroducing femtosecond to nanosecond time delays. We show the results of an ultrafast hard X-ray Photon Correlation Spectroscopy experiment at LCLS where split X-ray pulses were used to measure the dynamics of gold nanoparticles suspended in hexane. We show how reliable speckle contrast values can be extracted even from very low intensity free electron laser(FEL) speckle patterns by applying maximum likelihood fitting, thus demonstrating the potential of a split-and-delay approach for dynamics measurements at FEL sources. This will enable the characterization of equilibrium and, importantly also reversible non-equilibrium processes in atomically disordered materials.

---

Contributing Institute(s):

1. Coherent X-ray Scattering (FS-CXS)
2. FS-Beamline Technology (FS-BT)

Research Program(s):

1. 6215 - Soft Matter, Health and Life Sciences (POF3-621) (POF3-621)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2018

---

Database coverage:
; ; ; ; BIOSIS Previews ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF >= 10 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

---