scholarly journals Upgrade of the SPECIES beamline at the MAX IV Laboratory

2021 ◽  
Vol 28 (2) ◽  
pp. 588-601
Author(s):  
Esko Kokkonen ◽  
Felipe Lopes da Silva ◽  
Mikko-Heikki Mikkelã ◽  
Niclas Johansson ◽  
Shih-Wen Huang ◽  
...  
Keyword(s):  
Storage Ring ◽  
Time Resolution ◽  
Photoelectron Spectroscopy ◽  
Vacuum Ultraviolet ◽  
Ambient Pressure ◽  
Elevated Pressure ◽  
X Ray ◽  
X Ray Scattering ◽  
Unique Capability ◽  
Ray Scattering

The SPECIES beamline has been transferred to the new 1.5 GeV storage ring at the MAX IV Laboratory. Several improvements have been made to the beamline and its endstations during the transfer. Together the Ambient Pressure X-ray Photoelectron Spectroscopy and Resonant Inelastic X-ray Scattering endstations are capable of conducting photoelectron spectroscopy in elevated pressure regimes with enhanced time-resolution and flux and X-ray scattering experiments with improved resolution and flux. Both endstations offer a unique capability for experiments at low photon energies in the vacuum ultraviolet and soft X-ray range. In this paper, the upgrades on the endstations and current performance of the beamline are reported.

scholarly journals Simultaneous ambient pressure x-ray photoelectron spectroscopy and grazing incidence x-ray scattering in gas environments

2021 ◽  
Vol 92 (4) ◽  
pp. 044102
Author(s):  
Heath Kersell ◽  
Pengyuan Chen ◽  
Henrique Martins ◽  
Qiyang Lu ◽  
Felix Brausse ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
Grazing Incidence ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals P03, the microfocus and nanofocus X-ray scattering (MiNaXS) beamline of the PETRA III storage ring: the microfocus endstation

2012 ◽  
Vol 19 (4) ◽  
pp. 647-653 ◽  
Author(s):  
Adeline Buffet ◽  
André Rothkirch ◽  
Ralph Döhrmann ◽  
Volker Körstgens ◽  
Mottakin M. Abul Kashem ◽  
...  
Keyword(s):  
Storage Ring ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals The SPECIES beamline at the MAX IV Laboratory: a facility for soft X-ray RIXS and APXPS

2017 ◽  
Vol 24 (1) ◽  
pp. 344-353 ◽  
Author(s):  
Samuli Urpelainen ◽  
Conny Såthe ◽  
Walan Grizolli ◽  
Marcus Agåker ◽  
Ashley R. Head ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
Unique Property ◽  
Unique Combination ◽  
X Ray ◽  
Fast Switching ◽  
X Ray Scattering ◽  
And Performance ◽  
Ring Species ◽  
X Ray Absorption

SPECIES is an undulator-based soft X-ray beamline that replaced the old I511 beamline at the MAX II storage ring. SPECIES is aimed at high-resolution ambient-pressure X-ray photoelectron spectroscopy (APXPS), near-edge X-ray absorption fine-structure (NEXAFS), X-ray emission spectroscopy (XES) and resonant inelastic X-ray scattering (RIXS) experiments. The beamline has two branches that use a common elliptically polarizing undulator and monochromator. The beam is switched between the two branches by changing the focusing optics after the monochromator. Both branches have separate exit slits, refocusing optics and dedicated permanent endstations. This allows very fast switching between two types of experiments and offers a unique combination of the surface-sensitive XPS and bulk-sensitive RIXS techniques both in UHV and at elevated ambient-pressure conditions on a single beamline. Another unique property of the beamline is that it reaches energies down to approximately 27 eV, which is not obtainable on other current APXPS beamlines. This allows, for instance, valence band studies under ambient-pressure conditions. In this article the main properties and performance of the beamline are presented, together with selected showcase experiments performed on the new setup.

Nucleation and Growth of Gold Nanoparticles Studied via in situ Small Angle X-ray Scattering at Millisecond Time Resolution

ACS Nano ◽  
2010 ◽  
Vol 4 (2) ◽  
pp. 1076-1082 ◽  
Author(s):  
Jörg Polte ◽  
Robert Erler ◽  
Andreas F. Thünemann ◽  
Sergey Sokolov ◽  
T. Torsten Ahner ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Time Resolution ◽  
Small Angle ◽  
Nucleation And Growth ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals From antiferromagnetic and hidden order to Pauli paramagnetism in UM2Si2compounds with 5felectron duality

2020 ◽  
Vol 117 (48) ◽  
pp. 30220-30227 ◽  
Author(s):  
Andrea Amorese ◽  
Martin Sundermann ◽  
Brett Leedahl ◽  
Andrea Marino ◽  
Daisuke Takegami ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Degrees Of Freedom ◽  
Magnetic Moments ◽  
Electronic States ◽  
Dual Nature ◽  
X Ray ◽  
X Ray Scattering ◽  
Hidden Order ◽  
Pauli Paramagnetism ◽  
Ray Scattering

Using inelastic X-ray scattering beyond the dipole limit and hard X-ray photoelectron spectroscopy we establish the dual nature of the U5felectrons in UM2Si2(M = Pd, Ni, Ru, Fe), regardless of their degree of delocalization. We have observed that the compounds have in common a local atomic-like state that is well described by the U5f2configuration with theΓ1(1)andΓ2quasi-doublet symmetry. The amount of the U 5f3configuration, however, varies considerably across the UM2Si2series, indicating an increase of U 5f itineracy in going from M = Pd to Ni to Ru and to the Fe compound. The identified electronic states explain the formation of the very large ordered magnetic moments inUPd2Si2andUNi2Si2, the availability of orbital degrees of freedom needed for the hidden order inURu2Si2to occur, as well as the appearance of Pauli paramagnetism inUFe2Si2. A unified and systematic picture of the UM2Si2compounds may now be drawn, thereby providing suggestions for additional experiments to induce hidden order and/or superconductivity in U compounds with the tetragonal body-centeredThCr2Si2structure.

Femtosecond photodissociation dynamics of 1,4-diiodobenzene by gas-phase X-ray scattering and photoelectron spectroscopy

2016 ◽  
Vol 194 ◽  
pp. 525-536 ◽  
Author(s):  
Brian Stankus ◽  
James M. Budarz ◽  
Adam Kirrander ◽  
David Rogers ◽  
Joseph Robinson ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Excited Electronic State ◽  
Bound State ◽  
Initial Study ◽  
Time Resolved ◽  
X Ray ◽  
Complete Active Space ◽  
X Ray Scattering ◽  
Self Consistent Field ◽  
Ray Scattering

We present a multifaceted investigation into the initial photodissociation dynamics of 1,4-diiodobenzene (DIB) following absorption of 267 nm radiation. We combine ultrafast time-resolved photoelectron spectroscopy and X-ray scattering experiments performed at the Linac Coherent Light Source (LCLS) to study the initial electronic excitation and subsequent rotational alignment, and interpret the experiments in light of Complete Active Space Self-Consistent Field (CASSCF) calculations of the excited electronic landscape. The initially excited state is found to be a bound 1B1 surface, which undergoes ultrafast population transfer to a nearby state in 35 ± 10 fs. The internal conversion most likely leads to one or more singlet repulsive surfaces that initiate the dissociation. This initial study is an essential and prerequisite component of a comprehensive study of the complete photodissociation pathway(s) of DIB at 267 nm. Assignment of the initially excited electronic state as a bound state identifies the mechanism as predissociative, and measurement of its lifetime establishes the time between excitation and initiation of dissociation, which is crucial for direct comparison of photoelectron and scattering experiments.

High hydrostatic pressure small-angle X-ray scattering cell for protein solution studies featuring diamond windows and disposable sample cells

2008 ◽  
Vol 41 (1) ◽  
pp. 167-175 ◽  
Author(s):  
Nozomi Ando ◽  
Pascale Chenevier ◽  
Martin Novak ◽  
Mark W. Tate ◽  
Sol M. Gruner
Keyword(s):  
High Pressure ◽  
Small Angle ◽  
Ambient Pressure ◽  
X Rays ◽  
High Pressure Cell ◽  
X Ray ◽  
Pressure Cell ◽  
X Ray Scattering ◽  
Solution Studies ◽  
Ray Scattering

A high-pressure cell for synchrotron small-angle X-ray scattering (SAXS) studies of protein solutions is described. The design was optimized for use at up to 400 MPa in liquid pressure and with 8−12 keV X-rays with particular emphasis on the ease of use. The high-pressure cell was fabricated from corrosion-resistant Inconel 725 (Special Metals Corporation, Huntington, WV, USA) and featured Poulter-type windows [Poulter (1932).Phys. Rev.40, 861–871]. Flat natural diamonds, 500 µm thick, were recycled from diamond anvil cells and were shown to perform well as high-pressure SAXS windows. For a simple and effective method of sample isolation, disposable plastic sample cells with a defined path length and reproducible parasitic scattering were designed. These sample cells enable efficient use of synchrotron time. The cells facilitate rapid and easy sample changes, eliminate the need to clean the cell between sample changes, and reduce the sample volume to as low as 12 µl. The disposable cells can also be used separately from the high-pressure cell for SAXS measurements at ambient pressure and temporary storage of samples. The performance of the apparatus is demonstrated with T4 lysozyme.

scholarly journals The GALAXIES inelastic hard X-ray scattering end-station at Synchrotron SOLEIL

2019 ◽  
Vol 26 (1) ◽  
pp. 263-271 ◽  
Author(s):  
J. M. Ablett ◽  
D. Prieur ◽  
D. Céolin ◽  
B. Lassalle-Kaiser ◽  
B. Lebert ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Polarized Light ◽  
Research Direction ◽  
High Energy ◽  
High Energy Resolution ◽  
X Rays ◽  
Circularly Polarized Light ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

GALAXIES is an in-vacuum undulator hard X-ray micro-focused beamline dedicated to the study of the electronic structure of materials with high energy resolution using both photoelectron spectroscopy and inelastic X-ray scattering and under both non-resonant (NR-IXS) and resonant (RIXS) conditions. Due to the penetrating power of hard X-rays and the `photon-in/photon-out' technique, the sample environment is not a limitation. Materials under extreme conditions, for example in diamond anvil cells or catalysis chambers, thus constitute a major research direction. Here, the design and performance of the inelastic X-ray scattering end-station that operates in the energy range from ∼4 keV up to 12 keV is reported, and its capabilities are highlighted using a selection of data taken from recently performed experiments. The ability to scan `on the fly' the incident and scattered/emitted X-ray energies, and the sample position enables fast data collection and high experimental throughput. A diamond X-ray transmission phase retarder, which can be used to generate circularly polarized light, will also be discussed in the light of the recent RIXS–MCD approach.

scholarly journals The GALAXIES beamline at the SOLEIL synchrotron: inelastic X-ray scattering and photoelectron spectroscopy in the hard X-ray range

2015 ◽  
Vol 22 (1) ◽  
pp. 175-179 ◽  
Author(s):  
J.-P. Rueff ◽  
J. M. Ablett ◽  
D. Céolin ◽  
D. Prieur ◽  
Th. Moreno ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Resolving Power ◽  
Resonant Enhancement ◽  
X Ray ◽  
Gas Phases ◽  
X Ray Scattering ◽  
Characterization Of Materials ◽  
Selection Of ◽  
Ray Scattering

The GALAXIES beamline at the SOLEIL synchrotron is dedicated to inelastic X-ray scattering (IXS) and photoelectron spectroscopy (HAXPES) in the 2.3–12 keV hard X-ray range. These two techniques offer powerful complementary methods of characterization of materials with bulk sensitivity, chemical and orbital selectivity, resonant enhancement and high resolving power. After a description of the beamline components and endstations, the beamline capabilities are demonstrated through a selection of recent works both in the solid and gas phases and using either IXS or HAXPES approaches. Prospects for studies on liquids are discussed.

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