scholarly journals Setup for meV-resolution inelastic X-ray scattering measurements and X-ray diffraction at the Matter in Extreme Conditions endstation at the Linac Coherent Light Source

2018 ◽  
Vol 89 (10) ◽  
pp. 10F104 ◽  
Author(s):  
E. E. McBride ◽  
T. G. White ◽  
A. Descamps ◽  
L. B. Fletcher ◽  
K. Appel ◽  
...  
Keyword(s):  
Light Source ◽  
Extreme Conditions ◽  
Coherent Light ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Measurements ◽  
Linac Coherent Light Source ◽  
Coherent Light Source ◽  
Ray Scattering

scholarly journals A novel method for resonant inelastic soft X-ray scatteringviaphotoelectron spectroscopy detection

2017 ◽  
Vol 24 (6) ◽  
pp. 1180-1186
Author(s):  
Georgi L. Dakovski ◽  
Ming-Fu Lin ◽  
Daniel S. Damiani ◽  
William F. Schlotter ◽  
Joshua J. Turner ◽  
...  
Keyword(s):  
Light Source ◽  
Coherent Light ◽  
X Ray ◽  
X Ray Scattering ◽  
Linac Coherent Light Source ◽  
Novel Method ◽  
Coherent Light Source ◽  
Ray Scattering

A method for measuring resonant inelastic X-ray scattering based on the conversion of X-ray photons into photoelectrons is presented. The setup is compact, relies on commercially available detectors, and offers significant flexibility. This method is demonstrated at the Linac Coherent Light Source with ∼0.5 eV resolution at the cobaltL3-edge, with signal rates comparable with traditional grating spectrometers.

scholarly journals 7 Å resolution in protein two-dimensional-crystal X-ray diffraction at Linac Coherent Light Source

2014 ◽  
Vol 369 (1647) ◽  
pp. 20130500 ◽  
Author(s):  
Bill Pedrini ◽  
Ching-Ju Tsai ◽  
Guido Capitani ◽  
Celestino Padeste ◽  
Mark S. Hunter ◽  
...  
Keyword(s):  
Light Source ◽  
Molecular Mechanisms ◽  
Structural Information ◽  
Ultrashort Pulses ◽  
Two Dimensional ◽  
Coherent Light ◽  
X Ray Diffraction ◽  
X Ray ◽  
Linac Coherent Light Source ◽  
Coherent Light Source

Membrane proteins arranged as two-dimensional crystals in the lipid environment provide close-to-physiological structural information, which is essential for understanding the molecular mechanisms of protein function. Previously, X-ray diffraction from individual two-dimensional crystals did not represent a suitable investigational tool because of radiation damage. The recent availability of ultrashort pulses from X-ray free-electron lasers (XFELs) has now provided a means to outrun the damage. Here, we report on measurements performed at the Linac Coherent Light Source XFEL on bacteriorhodopsin two-dimensional crystals mounted on a solid support and kept at room temperature. By merging data from about a dozen single crystal diffraction images, we unambiguously identified the diffraction peaks to a resolution of 7 Å, thus improving the observable resolution with respect to that achievable from a single pattern alone. This indicates that a larger dataset will allow for reliable quantification of peak intensities, and in turn a corresponding increase in the resolution. The presented results pave the way for further XFEL studies on two-dimensional crystals, which may include pump–probe experiments at subpicosecond time resolution.

scholarly journals Compound refractive lenses as prefocusing optics for X-ray FEL radiation

2016 ◽  
Vol 23 (2) ◽  
pp. 425-429 ◽  
Author(s):  
Philip Heimann ◽  
Michael MacDonald ◽  
Bob Nagler ◽  
Hae Ja Lee ◽  
Eric Galtier ◽  
...  
Keyword(s):  
Energy Range ◽  
Light Source ◽  
Free Electron ◽  
Free Electron Laser ◽  
Extreme Conditions ◽  
Coherent Light ◽  
Angular Aperture ◽  
X Ray ◽  
Linac Coherent Light Source ◽  
Coherent Light Source

The performance of X-ray free-electron laser beamlines may be limited by the angular aperture. Compound refractive lenses (CRLs) can be employed to prefocus the X-ray beam, thereby increasing the beamline transmission. A prefocusing CRL was implemented in the X-ray transport of the Matter under Extreme Conditions Instrument at the Linac Coherent Light Source. A significant improvement in the beamline transmission was calculated over the 3–10 keV photon energy range. At 5 keV, the relative X-ray intensity was measured and a factor of four increase was seen in the beamline transmission. The X-ray focus was also determined by the ablation imprint method.

scholarly journals Coherent soft X-ray diffraction imaging of coliphage PR772 at the Linac coherent light source

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Hemanth K.N. Reddy ◽  
Chun Hong Yoon ◽  
Andrew Aquila ◽  
Salah Awel ◽  
Kartik Ayyer ◽  
...  
Keyword(s):  
Light Source ◽  
Coherent Light ◽  
X Ray Diffraction ◽  
X Ray ◽  
Linac Coherent Light Source ◽  
Diffraction Imaging ◽  
Coherent Light Source

scholarly journals Soft x-ray seeding studies for the SLAC Linac Coherent Light Source II

2019 ◽  
Vol 22 (11) ◽  
Author(s):  
E. Hemsing ◽  
G. Marcus ◽  
W. M. Fawley ◽  
R. W. Schoenlein ◽  
R. Coffee ◽  
...  
Keyword(s):  
Light Source ◽  
Coherent Light ◽  
X Ray ◽  
Linac Coherent Light Source ◽  
Coherent Light Source

Development of a hard x-ray split-delay system at the Linac Coherent Light Source

2017 ◽  
Author(s):  
Diling Zhu ◽  
Yanwen Sun ◽  
Donald W. Schafer ◽  
Hongliang Shi ◽  
Justin H. James ◽  
...  
Keyword(s):  
Light Source ◽  
Delay System ◽  
Coherent Light ◽  
X Ray ◽  
Linac Coherent Light Source ◽  
Coherent Light Source

scholarly journals Ronchi shearing interferometry for wavefronts with circular symmetry

2020 ◽  
Vol 27 (6) ◽  
pp. 1461-1469
Author(s):  
Bob Nagler ◽  
Eric C. Galtier ◽  
Shaughnessy B. Brown ◽  
Philip Heimann ◽  
Gilliss Dyer ◽  
...  
Keyword(s):  
Free Electron Laser ◽  
Simple Algorithm ◽  
Extreme Conditions ◽  
Coherent Light ◽  
Circular Symmetry ◽  
X Ray ◽  
Linac Coherent Light Source ◽  
Phase Plates ◽  
Focused Beam ◽  
Coherent Light Source

Ronchi testing of a focused electromagnetic wave has in the last few years been used extensively at X-ray free-electron laser (FEL) facilities to qualitatively evaluate the wavefront of the beam. It is a quick and straightforward test, is easy to interpret on the fly, and can be used to align phase plates that correct the focus of aberrated beams. In general, a single Ronchigram is not sufficient to gain complete quantitative knowledge of the wavefront. However the compound refractive lenses that are commonly used at X-ray FELs exhibit a strong circular symmetry in their aberration, and this can be exploited. Here, a simple algorithm that uses a single recorded Ronchigram to recover the full wavefront of a nano-focused beam, assuming circular symmetry, is presented, and applied to experimental measurements at the Matter in Extreme Conditions instrument at the Linac Coherent Light Source.

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