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Title: Numerical simulations of the hard X-ray pulse intensity distribution at the Linac Coherent Light Source

Journal Article · · Journal of Synchrotron Radiation (Online)
 [1];  [2];  [2];  [2];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
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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 are 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.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1373192
Alternate ID(s):
OSTI ID: 1420294; OSTI ID: 22735867
Journal Information:
Journal of Synchrotron Radiation (Online), Journal Name: Journal of Synchrotron Radiation (Online) Journal Issue: 4 Vol. 24; ISSN 1600-5775; ISSN JSYRES
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English

References (13)

Opto-mechanical design considerations for the Linac Coherent Light Source x-ray mirror system conference August 2008
Femtosecond X-ray protein nanocrystallography journal February 2011
PROPER: an optical propagation library for IDL conference September 2007
Effect of slope errors on the performance of mirrors for x-ray free electron laser applications journal January 2015
Predicting the coherent X-ray wavefront focal properties at the Linac Coherent Light Source (LCLS) X-ray free electron laser journal January 2009
Ultra-precise characterization of LCLS hard X-ray focusing mirrors by high resolution slope measuring deflectometry journal January 2012
Specification of glancing- and normal-incidence x-ray mirrors [also Erratum 34(11)3348(Nov1995)] journal February 1995
The Coherent X-ray Imaging (CXI) instrument at the Linac Coherent Light Source (LCLS) journal March 2010
Analysis of wavefront propagation using the Talbot effect journal January 2010
Morphology, microstructure, stress and damage properties of thin film coatings for the LCLS x-ray mirrors conference May 2009
Irreversible transformation of ferromagnetic ordered stripe domains in single-shot infrared-pump/resonant-x-ray-scattering-probe experiments journal February 2015
First lasing and operation of an ångstrom-wavelength free-electron laser journal August 2010
GENESIS 1.3: a fully 3D time-dependent FEL simulation code journal June 1999

Cited By (2)

The Macromolecular Femtosecond Crystallography Instrument at the Linac Coherent Light Source journal February 2019
On-line monitoring of the spatial properties of hard X-ray free-electron lasers based on a grating splitter journal April 2019

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XFEL
LCLS
wavefront propagation simulations
X-ray optics