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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

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The measurement protocol and data analysis procedure are given for obtaining transverse coherence of a synchrotron radiation X-ray source along four directions simultaneously using a single 2-D checkerboard phase grating. This simple technique can be applied for complete transverse coherence characterization of X-ray sources and X-ray...
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Here, we present a protocol on how to determine the quantity and distribution of metals in a sample using synchrotron X-ray fluorescence. We focus on adherent cells, and describe the chemical fixation method to prepare this sample. We then describe how to mount and image the sample using synchrotron X-rays.
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Reflection and Refraction13:59

Reflection and Refraction

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Source: Derek Wilson, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA
Light travels at different speeds depending on the material through which it is propagating. When light travels from one material to another, it will either slow down or speed up. In order to conserve energy and momentum, the light must change the direction in which it propagates. This bending of light is known as refraction. Some fraction of...
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Here we show how to process tree cores with an X-ray computed tomography toolchain. Except for chemical extraction for some purposes, no further physical lab treatment is needed. The toolchain can be used for biomass estimations, for obtaining MXD/tree-ring width data as well as for obtaining quantitative wood anatomy data.
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This paper presents the methods used for probing spatially correlated chemical, structural, and mechanical properties of the multilayered scale of Atractosteus spatula (A. spatula) using nanoindentation, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and X-ray computed tomography (X-ray CT). The experimental results have been used to investigate the design principles of protective biological...
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関連する実験動画

Updated: Jan 20, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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マイクロメートルスケール表面からのX線反射率測定：ナノビームを用いたアプローチ

Vedran Vonk1, Steffen Tober2, Steven J Leake3

  • 1Centre for X-ray and Nano Science CXNS Deutsches Elektronen-Synchrotron DESY Notkestraße 85 22607 Hamburg Germany.

Journal of applied crystallography
|January 19, 2026
PubMed
まとめ

精密なアライメントは、ナノスケールでの ગ્રેઝિંગ-incidence X線測定の鍵となります。本研究では、サンプル位置をX線ビーム内に維持するための1次元トラジェクトリスキャン法を導入し、反射率データの精度を向上させます。

キーワード:
X線ナノビームX線反射率

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Preparing Adherent Cells for X-ray Fluorescence Imaging by Chemical Fixation
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関連する実験動画

Last Updated: Jan 20, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Published on: October 11, 2016

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Preparing Adherent Cells for X-ray Fluorescence Imaging by Chemical Fixation
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Cell Surface Receptor Identification Using Genome-Scale CRISPR/Cas9 Genetic Screens
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科学分野:

  • 材料科学
  • 表面科学
  • ナノテクノロジー

背景:

  • 正確なサンプルアライメントは、ナノスケールでの ગ્રેઝિંગ-incidence X線測定にとって極めて重要です。
  • 系統誤差やサンプルの動きにより、一貫したビームとサンプルの相互作用を維持することは困難です。

研究 の 目的:

  • 反射率測定中に表面上の特定の関心領域をX線ビーム内に維持する方法を開発し、実証すること。
  • X線分析のためのナノスケールサンプルのアライメントにおける課題に対処すること。

主な方法:

  • 入射角（θ）、検出器角（2θ）、およびサンプル位置を1軸に沿って変化させる1次元トラジェクトリスキャン技術を採用しました。
  • 90 nmのビームを使用して、10 × 10 µmの金（Au）島上でX線反射率測定を実施しました。

主要な成果:

  • 1次元トラジェクトリスキャンは、サンプルをX線ビーム内に正確に位置決めすることに成功しました。
  • データ解析では、サンプルと周囲の支持体に対する角度依存的なX線ビームフットプリントを考慮しました。

結論:

  • 開発された1次元トラジェクトリスキャン法は、ナノスケールX線反射率測定の信頼性を向上させます。
  • この技術は、精密なサンプルポジショニングが困難な場合の正確な表面分析に役立ちます。