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Title: Photon-in photon-out hard X-ray spectroscopy at the Linac Coherent Light Source

Abstract

X-ray free-electron lasers (FELs) have opened unprecedented possibilities to study the structure and dynamics of matter at an atomic level and ultra-fast timescale. Many of the techniques routinely used at storage ring facilities are being adapted for experiments conducted at FELs. In order to take full advantage of these new sources several challenges have to be overcome. They are related to the very different source characteristics and its resulting impact on sample delivery, X-ray optics, X-ray detection and data acquisition. Here it is described how photon-in photon-out hard X-ray spectroscopy techniques can be applied to study the electronic structure and its dynamics of transition metal systems with ultra-bright and ultra-short FEL X-ray pulses. In particular, some of the experimental details that are different compared with synchrotron-based setups are discussed and illustrated by recent measurements performed at the Linac Coherent Light Source.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. SLAC National Accelerator Laboratory, Menlo Park, CA (United States)
  2. SLAC National Accelerator Laboratory, Menlo Park, CA (United States); Lawrence Berkeley National Lab., Berkeley, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
Portions of this research were carried out at the Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory. LCLS is an Office of Science User Facility operated for the US Department of Energy Office of Science by Stanford University.
OSTI Identifier:
1208866
Grant/Contract Number:
AC03-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Synchrotron Radiation (Online)
Additional Journal Information:
Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 22; Journal Issue: 3; Journal ID: ISSN 1600-5775
Publisher:
International Union of Crystallography
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; FEL; hard X-ray emission spectroscopy; XES; XRS

Citation Formats

Alonso-Mori, Roberto, Sokaras, Dimosthenis, Zhu, Diling, Kroll, Thomas, Chollet, Mathieu, Feng, Yiping, Glownia, James M., Kern, Jan, Lemke, Henrik T., Nordlund, Dennis, Robert, Aymeric, Sikorski, Marcin, Song, Sanghoon, Weng, Tsu -Chien, and Bergmann, Uwe. Photon-in photon-out hard X-ray spectroscopy at the Linac Coherent Light Source. United States: N. p., 2015. Web. doi:10.1107/S1600577515004488.
Alonso-Mori, Roberto, Sokaras, Dimosthenis, Zhu, Diling, Kroll, Thomas, Chollet, Mathieu, Feng, Yiping, Glownia, James M., Kern, Jan, Lemke, Henrik T., Nordlund, Dennis, Robert, Aymeric, Sikorski, Marcin, Song, Sanghoon, Weng, Tsu -Chien, & Bergmann, Uwe. Photon-in photon-out hard X-ray spectroscopy at the Linac Coherent Light Source. United States. doi:10.1107/S1600577515004488.
Alonso-Mori, Roberto, Sokaras, Dimosthenis, Zhu, Diling, Kroll, Thomas, Chollet, Mathieu, Feng, Yiping, Glownia, James M., Kern, Jan, Lemke, Henrik T., Nordlund, Dennis, Robert, Aymeric, Sikorski, Marcin, Song, Sanghoon, Weng, Tsu -Chien, and Bergmann, Uwe. Wed . "Photon-in photon-out hard X-ray spectroscopy at the Linac Coherent Light Source". United States. doi:10.1107/S1600577515004488. https://www.osti.gov/servlets/purl/1208866.
@article{osti_1208866,
title = {Photon-in photon-out hard X-ray spectroscopy at the Linac Coherent Light Source},
author = {Alonso-Mori, Roberto and Sokaras, Dimosthenis and Zhu, Diling and Kroll, Thomas and Chollet, Mathieu and Feng, Yiping and Glownia, James M. and Kern, Jan and Lemke, Henrik T. and Nordlund, Dennis and Robert, Aymeric and Sikorski, Marcin and Song, Sanghoon and Weng, Tsu -Chien and Bergmann, Uwe},
abstractNote = {X-ray free-electron lasers (FELs) have opened unprecedented possibilities to study the structure and dynamics of matter at an atomic level and ultra-fast timescale. Many of the techniques routinely used at storage ring facilities are being adapted for experiments conducted at FELs. In order to take full advantage of these new sources several challenges have to be overcome. They are related to the very different source characteristics and its resulting impact on sample delivery, X-ray optics, X-ray detection and data acquisition. Here it is described how photon-in photon-out hard X-ray spectroscopy techniques can be applied to study the electronic structure and its dynamics of transition metal systems with ultra-bright and ultra-short FEL X-ray pulses. In particular, some of the experimental details that are different compared with synchrotron-based setups are discussed and illustrated by recent measurements performed at the Linac Coherent Light Source.},
doi = {10.1107/S1600577515004488},
journal = {Journal of Synchrotron Radiation (Online)},
number = 3,
volume = 22,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2015},
month = {Wed Apr 15 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 15works
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  • We measured the transverse and longitudinal coherence properties of the Linac Coherent Light Source (LCLS) at SLAC in the hard x-ray regime at 9 keV photon energy on a single shot basis. Speckle patterns recorded in the forward direction from colloidal nanoparticles yielded the transverse coherence properties of the focused LCLS beam. Speckle patterns from a gold nanopowder recorded with atomic resolution allowed us to measure the shot-to-shot variations of the spectral properties of the x-ray beam. The focused beam is in the transverse direction fully coherent with a mode number close to 1. The average number of longitudinal modesmore » behind the Si(111) monochromator is about 14.5 and the average coherence time {tau}{sub c} = (2.0 {+-} 1.0) fs. The data suggest a mean x-ray pulse duration of (29 {+-} 14) fs behind the monochromator for (100 {+-} 14) fs long electron pulses.« less
  • Numerical simulations of the current and future pulse intensity distributions at selected locations along the Far Experimental Hall, the hard X-ray section of the Linac Coherent Light Source (LCLS), are provided. Estimates are given for the pulse fluence, energy and size in and out of focus, taking into account effects due to the experimentally measured divergence of the X-ray beam, and measured figure errors of all X-ray optics in the beam path. Out-of-focus results are validated by comparison with experimental data. Previous work is expanded on, providing quantitatively correct predictions of the pulse intensity distribution. Numerical estimates in focus aremore » particularly important given that the latter cannot be measured with direct imaging techniques due to detector damage. Finally, novel numerical estimates of improvements to the pulse intensity distribution expected as part of the on-going upgrade of the LCLS X-ray transport system are provided. As a result, we suggest how the new generation of X-ray optics to be installed would outperform the old one, satisfying the tight requirements imposed by X-ray free-electron laser facilities.« less
  • Numerical simulations of the current and future pulse intensity distributions at selected locations along the Far Experimental Hall, the hard X-ray section of the Linac Coherent Light Source (LCLS), are provided. Estimates are given for the pulse fluence, energy and size in and out of focus, taking into account effects due to the experimentally measured divergence of the X-ray beam, and measured figure errors of all X-ray optics in the beam path. Out-of-focus results are validated by comparison with experimental data. Previous work is expanded on, providing quantitatively correct predictions of the pulse intensity distribution. Numerical estimates in focus aremore » particularly important given that the latter cannot be measured with direct imaging techniques due to detector damage. Finally, novel numerical estimates of improvements to the pulse intensity distribution expected as part of the on-going upgrade of the LCLS X-ray transport system are provided. We suggest how the new generation of X-ray optics to be installed would outperform the old one, satisfying the tight requirements imposed by X-ray free-electron laser facilities.« less