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An x-ray optic calibration facility for high energy density diagnostics.

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A new calibration facility precisely measures x-ray imaging optics for high energy density (HED) and inertial confinement fusion (ICF) experiments. This ensures accurate determination of x-ray flux and wavelengths, crucial for fusion research.

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Area of Science:

  • X-ray optics calibration
  • High energy density physics
  • Fusion diagnostics

Background:

  • X-ray imaging optics are critical for diagnostics in high energy density (HED) and inertial confinement fusion (ICF) research.
  • Accurate calibration is needed to determine x-ray flux and wavelengths in HED and ICF experiments.
  • Existing calibration methods lacked the precision required for advanced fusion diagnostics.

Purpose of the Study:

  • To establish a dedicated facility for calibrating x-ray imaging optics.
  • To enable precise measurements of spectral reflectivity, resolution, and spatial characteristics of optics.
  • To support diagnostics at facilities like the National Ignition Facility and Sandia Z-Machine.

Main Methods:

  • Construction of a new calibration facility at Lawrence Livermore National Laboratory.
  • Measurement of x-ray reflectivity from 5 to 60 keV with ±5% accuracy.
  • Determination of optic point spread functions to assess spatial resolution (currently 50 μm, future 13 μm).
  • Measurement of optic distance to the source and detector within ±100 μm.

Main Results:

  • The facility successfully calibrated selected x-ray optics.
  • Initial data demonstrated the capability to measure spectral reflectivity and point spread functions.
  • The calibration process provides essential data for absolute determination of x-ray flux and wavelengths.

Conclusions:

  • The new calibration facility meets the stringent requirements for HED and ICF diagnostics.
  • Accurate calibration enhances the reliability and precision of fusion experiment data.
  • The facility is essential for advancing research in high energy density and fusion science.