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Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
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Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
X-ray Diffraction of Biological Samples01:10

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X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Periodically structured X-ray waveguides.

Inna Bukreeva1, Andrea Sorrentino, Alessia Cedola

  • 1Institute for Photonics and Nanotechnologies, CNR, 00156 Rome, Italy. innabukreeva@yahoo.it

Journal of Synchrotron Radiation
|August 20, 2013
PubMed
Summary
This summary is machine-generated.

Periodic structures in X-ray vacuum-gap waveguides enhance electromagnetic field propagation. This study reveals

Keywords:
X-ray beams and X-ray opticsX-ray microscopesinterferencesynchrotron radiation instrumentationtransmission and absorptionwave propagation

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Area of Science:

  • Physics
  • Optics
  • Materials Science

Background:

  • X-ray waveguides (WGs) are crucial for manipulating X-ray beams.
  • Periodic structures can modify electromagnetic field propagation.
  • Understanding these interactions is key for advanced X-ray applications.

Purpose of the Study:

  • To investigate the impact of periodic structures on X-ray vacuum-gap waveguides.
  • To identify conditions for efficient electromagnetic field propagation.
  • To analyze the mode filtering properties of structured WGs.

Main Methods:

  • Theoretical analysis of wave propagation.
  • Numerical simulations of electromagnetic fields.
  • Experimental validation using diffraction patterns.

Main Results:

  • Periodic structures impose additional conditions for efficient propagation.
  • Maximum transmission occurs for guided modes with phase synchronism ('super-resonances').
  • Low incidence angles are critical for propagation, demonstrating mode filtering.

Conclusions:

  • Structured X-ray waveguides exhibit enhanced mode filtering capabilities.
  • The findings are crucial for designing advanced X-ray optics.
  • Super-resonance conditions enable optimized X-ray beam manipulation.