scholarly journals The emerging role of 4D synchrotron X-ray micro-tomography for climate and fossil energy studies: five experiments showing the present capabilities at beamline 8.3.2 at the Advanced Light Source

2017 ◽  
Vol 24 (6) ◽  
pp. 1237-1249 ◽  
Author(s):  
Marco Voltolini ◽  
Abdelmoula Haboub ◽  
Shan Dou ◽  
Tae-Hyuk Kwon ◽  
Alastair A. MacDowell ◽  
...  
Keyword(s):  
Uniaxial Stress ◽  
Light Sources ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Deep Aquifers ◽  
X Ray Imaging ◽  
Oil Shale Pyrolysis ◽  
Synchrotron Light ◽  
Micro Tomography ◽  
Synchrotron Light Sources

Continuous improvements at X-ray imaging beamlines at synchrotron light sources have made dynamic synchrotron X-ray micro-computed tomography (SXR-µCT) experiments more routinely available to users, with a rapid increase in demand given its tremendous potential in very diverse areas. In this work a survey of five different four-dimensional SXR-µCT experiments is presented, examining five different parameters linked to the evolution of the investigated system, and tackling problems in different areas in earth sciences. SXR-µCT is used to monitor the microstructural evolution of the investigated sample with the following variables: (i) high temperature, observingin situoil shale pyrolysis; (ii) low temperature, replicating the generation of permafrost; (iii) high pressure, to study the invasion of supercritical CO2in deep aquifers; (iv) uniaxial stress, to monitor the closure of a fracture filled with proppant, in shale; (v) reactive flow, to observe the evolution of the hydraulic properties in a porous rock subject to dissolution. For each of these examples, it is shown how dynamic SXR-µCT was able to provide new answers to questions related to climate and energy studies, highlighting the significant opportunities opened recently by the technique.

scholarly journals Development of an X-ray imaging system to prevent scintillator degradation for white synchrotron radiation

2018 ◽  
Vol 25 (3) ◽  
pp. 801-807 ◽  
Author(s):  
Tunhe Zhou ◽  
Hongchang Wang ◽  
Thomas Connolley ◽  
Steward Scott ◽  
Nick Baker ◽  
...  
Keyword(s):  
High Speed ◽  
Imaging System ◽  
Dust Particles ◽  
Light Sources ◽  
Contrast Imaging ◽  
X Ray ◽  
X Ray Imaging ◽  
Synchrotron Light ◽  
Cost Efficient ◽  
Synchrotron Light Sources

The high flux of the white X-ray beams from third-generation synchrotron light sources can significantly benefit the development of high-speed X-ray imaging, but can also bring technical challenges to existing X-ray imaging systems. One prevalent problem is that the image quality deteriorates because of dust particles accumulating on the scintillator screen during exposure to intense X-ray radiation. Here, this problem has been solved by embedding the scintillator in a flowing inert-gas environment. It is also shown that the detector maintains the quality of the captured images even after days of X-ray exposure. This modification is cost-efficient and easy to implement. Representative examples of applications using the X-ray imaging system are also provided, including fast tomography and multimodal phase-contrast imaging for biomedical and geological samples.

scholarly journals Short X-ray pulses from third-generation light sources

2016 ◽  
Vol 23 (1) ◽  
pp. 141-151 ◽  
Author(s):  
A. G. Stepanov ◽  
C. P. Hauri
Keyword(s):  
Large Scale ◽  
Light Sources ◽  
Third Generation ◽  
Time Duration ◽  
Pulse Emission ◽  
Time Resolved ◽  
High Brightness ◽  
X Ray ◽  
Synchrotron Light ◽  
Synchrotron Light Sources

High-brightness X-ray radiation produced by third-generation synchrotron light sources (TGLS) has been used for numerous time-resolved investigations in many different scientific fields. The typical time duration of X-ray pulses delivered by these large-scale machines is about 50–100 ps. A growing number of time-resolved studies would benefit from X-ray pulses with two or three orders of magnitude shorter duration. Here, techniques explored in the past for shorter X-ray pulse emission at TGLS are reviewed and the perspective towards the realisation of picosecond and sub-picosecond X-ray pulses are discussed.

scholarly journals A Rebirth of Laboratory XANES and XES

2014 ◽  
Vol 70 (a1) ◽  
pp. C222-C222
Author(s):  
Gerald Seidler ◽  
Devon Mortensen ◽  
Joseph Pacold ◽  
Oliver Hoidn
Keyword(s):  
High Resolution ◽  
Energy Range ◽  
Emission Spectroscopy ◽  
Light Sources ◽  
Edge Structure ◽  
X Ray ◽  
Insertion Device ◽  
Synchrotron Light ◽  
Synchrotron Light Sources ◽  
X Ray Absorption

We have recently launched a reinvestigation of laboratory-based measurement of x-ray absorption near edge structure (XANES) and high-resolution x-ray emission spectroscopy (XES). Driven by the roughly one-hundred-fold improvement in the efficiency of high resolution x-ray optics compared to the 1970's, we have demonstrated that surprisingly impressive performance is now possible with laboratory XES instruments and that quite useful performance is possible for laboratory XANES. For applications in the 5 keV- 10 keV energy range, i.e., appropriate for 3d transition metal K edges and lanthanide L edges, we find XES performance that is intermediate between what can be achieved at bending-magnet and insertion-device beamlines at third generation synchrotron light sources. In the same energy range, we find that high quality XANES measurements can be performed in transmission mode on concentrated samples with the present instrument and should be possible, in many cases, in fluorescence mode after a planned upgrade brings the monochromatic beam flux up to approximately 10M/sec.

A monochromator for scanning X-ray microscopy beamlines at third-generation synchrotron light sources

1996 ◽  
Vol 3 (4) ◽  
pp. 197-198 ◽  
Author(s):  
A. Irtel von Brenndorff ◽  
B. Niemann ◽  
D. Rudolph ◽  
G. Schmahl
Keyword(s):  
Light Sources ◽  
Third Generation ◽  
X Ray ◽  
Synchrotron Light ◽  
Synchrotron Light Sources
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