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X-ray diffraction from shock-loaded polycrystals.

Damian C Swift1

  • 1P-24 Plasma Physics, Los Alamos National Laboratory, MS E526, Los Alamos, New Mexico 87545, USA. damian.swift@physics.org

The Review of Scientific Instruments
|February 6, 2008
PubMed
Summary
This summary is machine-generated.

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Researchers used X-ray diffraction to study shock-compressed beryllium on nanosecond timescales. Diffraction angles changed with shock pressure, revealing elastic and plastic compression responses.

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Shock Physics

Background:

  • Understanding material behavior under extreme conditions like shock compression is crucial for various scientific and engineering applications.
  • Previous studies often lacked the temporal resolution to capture dynamic responses during shock events.

Purpose of the Study:

  • To demonstrate X-ray diffraction from shock-compressed polycrystalline metals on nanosecond timescales.
  • To investigate the dynamic elastic and plastic compression responses of beryllium under shock loading.

Main Methods:

  • Inducing shock waves in polycrystalline beryllium foils using laser ablation.
  • Generating a plasma X-ray source with a second laser pulse on a titanium foil.
  • Collimating the X-ray beam and directing it at the shocked beryllium sample.

Related Experiment Videos

  • Detecting diffracted X-rays using films and X-ray streak cameras.

    • Main Results:

    • Successfully demonstrated X-ray diffraction from shock-compressed beryllium.
    • Observed changes in diffraction angles correlated with shock pressure.
    • Diffraction data were consistent with predicted uniaxial (elastic) and isotropic (plastic) compression behaviors.

    Conclusions:

    • X-ray diffraction is a viable technique for probing material responses at high shock pressures and on nanosecond timescales.
    • The study provides insights into the dynamic lattice response of beryllium under shock compression.
    • This method can be extended to study phase transitions in materials under extreme conditions.