Current status and future plan of the soft x-ray beamline at SACLA (Conference Presentation)

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.

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Current status of the studies of x-ray diffraction on tungsten during pulsed heat loads at the scattering station «plasma» at the VEPP-4 source of synchrotron radiation

10.1063/5.0030577 ◽

2020 ◽

Author(s):

Sergey Kazantsev ◽

Aleksey Arakcheev ◽

Oleg Evdokov ◽

Lev Shekhtman ◽

Boris Tolochko ◽

...

Keyword(s):

Synchrotron Radiation ◽

Current Status ◽

X Ray Diffraction ◽

X Ray ◽

Heat Loads

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Current status of the studies of biological objects by the time-resolved X-ray diffraction technique

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2005.01.136 ◽

2005 ◽

Vol 543 (1) ◽

pp. 143-147 ◽

Cited By ~ 8

Author(s):

V.M. Aul’chenko ◽

M.A. Bukin ◽

A.A. Vazina ◽

A.M. Gadzhiev ◽

B.N. Korneev ◽

...

Keyword(s):

Current Status ◽

X Ray Diffraction ◽

Time Resolved ◽

X Ray ◽

Biological Objects

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Current Questions and New Directions in Archaeological Obsidian Studies

10.1093/oxfordhb/9780199935413.013.2 ◽

2016 ◽

Cited By ~ 4

Author(s):

Carolyn Dillian

Keyword(s):

Chemical Characterization ◽

Current Status ◽

Formation Processes ◽

X Ray ◽

Dating Methods ◽

New Directions ◽

Trade And Exchange

This article discusses the current status of archaeological obsidian studies, including techniques used in characterization and sourcing studies, obsidian hydration, and regional syntheses. It begins with an overview of obsidian and the unique formation processes that create it before turning to a discussion of the significance of characterization and sourcing techniques for understanding prehistoric obsidian trade and exchange. It then considers the problematic aspects of the term “sourcing,” despite its ubiquitous use in archaeology and archaeometry, along with the use of X-ray fluorescence in the chemical characterization of obsidian. It also explores obsidian hydration dating methods and equations, factors that can affect the date assignments for hydration specimens, and the various uses of obsidian in prehistoric times. Finally, it addresses some important questions relating to obsidian research and suggests new directions in the field.

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Beyond History: The List of The Most Well Studied Human Protein Structures

10.20944/preprints202008.0655.v1 ◽

2020 ◽

Author(s):

Zhenlu Li ◽

Matthias Buck

Keyword(s):

Protein Structures ◽

Protein Sequences ◽

Human Protein ◽

Current Status ◽

Protein Database ◽

X Ray ◽

X Ray Crystallography ◽

Protein Biophysics ◽

The Relationship ◽

Past Trend

Of 20,000 or so canonical human protein sequences, as of July 2020, 6,747 proteins have had their full or partial medium to high-resolution structures determined by x-ray crystallography or other methods. Which of these proteins dominate the protein database (the PDB) and why? In this paper, we list the 272 top protein structures based on the number of their PDB depositions. This set of proteins accounts for more than 40% of all available human PDB entries and represent past trend and current status for protein science. We briefly discuss the relationship which some of the prominent protein structures have with protein biophysics research and mention their relevance to human diseases. The information may inspire researchers who are new to protein science, but it also provides a year 2020 snap-shot for the state of protein science.

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