scholarly journals Environmental Assessment for Enhanced Operations of the Advanced Photon Source at Argonne National Laboratory-East, Argonne, Illinois

2003 ◽  
Author(s):  
N
Keyword(s):  
Environmental Assessment ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Photon Source

On the structure of aragonite

2005 ◽  
Vol 61 (2) ◽  
pp. 129-132 ◽  
Author(s):  
E. N. Caspi ◽  
B. Pokroy ◽  
P. L. Lee ◽  
J. P. Quintana ◽  
E. Zolotoyabko
Keyword(s):  
High Resolution ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Orthorhombic Symmetry ◽  
X Ray ◽  
Impurity Atoms ◽  
Synchrotron Powder Diffraction ◽  
Refinement Procedure ◽  
Photon Source

High-resolution synchrotron powder diffraction measurements were carried out at the 32-ID beamline of the Advanced Photon Source of Argonne National Laboratory in order to clarify the structure of geological aragonite, a widely abundant polymorph of CaCO3. The investigated crystals were practically free of impurity atoms, as measured by wavelength-dispersive X-ray spectroscopy in scanning electron microscopy. A superior quality of diffraction data was achieved by using the 11-channel 111 Si multi-analyzer of the diffracted beam. Applying the Rietveld refinement procedure to the high-resolution diffraction spectra, we were able to extract the aragonite lattice parameters with an accuracy of about 20 p.p.m. The data obtained unambiguously confirm that pure aragonite crystals have orthorhombic symmetry.

First X-Ray Microprobe and Microspectroscopy Results From The Gsecars Sector At The Advanced Photon Source

1997 ◽  
Vol 3 (S2) ◽  
pp. 905-906
Author(s):  
Mark L. Rivers ◽  
Stephen R. Sutton ◽  
Peter Eng ◽  
Matthew Newville
Keyword(s):  
National Laboratory ◽  
Argonne National Laboratory ◽  
Third Generation ◽  
X Rays ◽  
Environmental Sciences ◽  
X Ray ◽  
State Determination ◽  
X Ray Absorption ◽  
The Magnetic Field ◽  
Photon Source

The Advanced Photon Source (APS) at Argonne National Laboratory is a third-generation synchrotron x-ray source, optimized for producing x-rays from undulators. Such undulator sources provide extremely bright, quasi-monochromatic radiation which is ideal for an x-ray microprobe. Such microprobes can be used for trace element quantification with x-ray fluorescence, or for chemical state determination with x-ray absorption spectroscopy. The GeoSoilEnviroCARS (GSECARS) sector at the APS is building an x-ray microprobe for research in earth, planetary, soil and environmental sciences.The GSECARS undulator source is a standard APS Undulator “A” which is a 3.3 cm period device with 72 periods. The energies of the undulator peaks can be varied by adjusting the gap, and hence the magnetic field of the undulator. The energy of the first harmonic can be varied in this way from approximately 3.1 keV to 14 keV. A measured undulator spectrum is shown in Figure 1.

Local Measurements in Cavitating Flow by Ultra-Fast X-Ray Imaging

2009 ◽  
Author(s):  
O. Coutier-Delgosha ◽  
A. Vabre ◽  
M. Hocevar ◽  
R. Delion ◽  
A. Dazin ◽  
...  
Keyword(s):  
National Laboratory ◽  
Argonne National Laboratory ◽  
Velocity Fields ◽  
Cavitating Flow ◽  
Research Teams ◽  
X Ray ◽  
X Ray Imaging ◽  
Local Measurements ◽  
Velocity Pressure ◽  
Photon Source

The present paper presents an experimental method to measure velocity fields in a cavitating flow. Dynamics of the liquid phase and of the bubbles are both investigated. The measurements are based on ultra fast X-ray imaging performed at the APS (Advanced Photon Source) of the Argonne National Laboratory. This is collaboration between research teams devoted to fluid mechanics (LML laboratory, Laboratory for water and turbine machines) and experts in X-ray imaging (French atomic commission, Argonne National Laboratory). The experimental device consists of a millimetric Venturi test section associated with a transportable hydraulic loop. Various configurations of velocity, pressure, and temperature have been investigated. This first paper focuses on the experimental equipment and process, and also the description of the image processing which is performed to analyze the results and obtain the velocity fields of both phases within the cavitating areas. Promising preliminary results are also presented.

scholarly journals Development of combined microstructure and structure characterization facility forin situandoperandostudies at the Advanced Photon Source

2018 ◽  
Vol 51 (3) ◽  
pp. 867-882 ◽  
Author(s):  
Jan Ilavsky ◽  
Fan Zhang ◽  
Ross N. Andrews ◽  
Ivan Kuzmenko ◽  
Pete R. Jemian ◽  
...  
Keyword(s):  
Small Angle ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Incident Beam ◽  
Evolutionary Development ◽  
X Ray ◽  
X Ray Scattering ◽  
Wide Range ◽  
Photon Source ◽  
Ray Scattering

Following many years of evolutionary development, first at the National Synchrotron Light Source, Brookhaven National Laboratory, and then at the Advanced Photon Source (APS), Argonne National Laboratory, the APS ultra-small-angle X-ray scattering (USAXS) facility has been transformed by several new developments. These comprise a conversion to higher-order crystal optics and higher X-ray energies as the standard operating mode, rapid fly scan measurements also as a standard operational mode, automated contiguous pinhole small-angle X-ray scattering (SAXS) measurements at intermediate scattering vectors, and associated rapid wide-angle X-ray scattering (WAXS) measurements for X-ray diffraction without disturbing the sample geometry. With each mode using the USAXS incident beam optics upstream of the sample, USAXS/SAXS/WAXS measurements can now be made within 5 min, allowingin situandoperandomeasurement capabilities with great flexibility under a wide range of sample conditions. These developments are described, together with examples of their application to investigate materials phenomena of technological importance. Developments of two novel USAXS applications, USAXS-based X-ray photon correlation spectroscopy and USAXS imaging, are also briefly reviewed.

The local structure of Ta(v) aqua ions in high temperature fluoride- and chloride-bearing solutions: Implications for Ta transport in granite-related postmagmatic fluids

2019 ◽  
Vol 57 (6) ◽  
pp. 843-851
Author(s):  
Alan J. Anderson ◽  
Robert A. Mayanovic ◽  
Thomas Lee
Keyword(s):  
High Temperature ◽  
Local Structure ◽  
Elevated Temperatures ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Acidic Solutions ◽  
Diamond Anvil ◽  
X Ray Absorption ◽  
Photon Source

Abstract The local structure of Ta(V) in high-temperature fluoride- and chloride-bearing acidic solutions was investigated using in situ X-ray absorption spectroscopy (XAS). All XAS spectra were collected from two solutions, designated A and B, at beamline ID-20-C at the Advanced Photon Source, Argonne National Laboratory. Spectra were collected from solution A at 350 and 400 °C and from solution B at 25, 360, and 400 °C after the solutions were sealed in a hydrothermal diamond anvil cell. Solution A was prepared by dissolving Ta2O5 powder in 5% HF solution; solution B consisted of TaCl5 dissolved in 2% HF. The dominant tantalum species in solution A at elevated temperatures was TaF83–. In contrast, TaCl6–, which was the dominant complex in solution B at room temperature, disappeared as hydroxide complexes with an average ligand number between 5 and 7 became the dominant species at 350 and 400 °C. The XAS results confirm the previously recognized effect of fluoride activity on Ta speciation in hydrothermal fluids and suggest that both fluoride and hydroxide complexes play an important role in the transport of Ta in acidic fluoride-bearing solutions involved in the formation of mineralized mica-rich replacement units in granitic pegmatites.

scholarly journals Vibratory response of a mirror support/positioning system for the Advanced Photon Source Project at Argonne National Laboratory

1996 ◽  
Author(s):  
Ipek Basdogan ◽  
Thomas J. Royston ◽  
Ahmed A. Shabana ◽  
Deming Shu ◽  
Tuncer M. Kuzay
Keyword(s):  
National Laboratory ◽  
Argonne National Laboratory ◽  
Positioning System ◽  
Vibratory Response ◽  
Photon Source

scholarly journals Vibration considerations in the design of the Advanced Photon Source at Argonne National Laboratory

1992 ◽  
Author(s):  
Joseph A. Jendrzejczyk ◽  
Martin W. Wambsganss
Keyword(s):  
National Laboratory ◽  
Argonne National Laboratory ◽  
Photon Source

A Multi-Anvil High Pressure System with Synchrotron X-Ray Probe: New Opportunities for In-Situ Materials Research at Simultaneously High Pressure and Temperature

1997 ◽  
Vol 499 ◽  
Author(s):  
Y. Wang ◽  
G. Shen ◽  
M. Rivers ◽  
S. Sutton
Keyword(s):  
High Pressure ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Pressure System ◽  
High Pressure And Temperature ◽  
High Pressure High Temperature ◽  
Materials Research ◽  
Photon Source ◽  
High Pressure Apparatus

ABSTRACTWe describe the multi-anvil, large-volume, high-pressure facility that is being constructed at the GeoSoilEnviroCARS (Sector 13) at the Advanced Photon Source, Argonne National Laboratory. Various multi-anvil, high-pressure apparatus will be used to cover pressure and temperature conditions up to 40 GPa and 3000 °C, respectively, with milimeter to centimeter sized samples. This national facility is open to all users, providing excellent opportunities for high pressure, high temperature experiments.

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