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Reflective multilayer optic as hard X-ray diagnostic on laser-plasma experiment.

N F Brejnholt1, T A Decker1, R M Hill1

  • 1Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

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A new multilayer optic significantly improved X-ray diagnostics in laser-plasma experiments by enhancing signal-to-noise ratios. This advancement offers a more effective method for analyzing high-energy X-rays from these complex experiments.

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Area of Science:

  • Plasma physics
  • X-ray optics
  • Laser-driven experiments

Background:

  • Laser-plasma experiments generate complex X-ray spectra.
  • Accurate X-ray diagnostics are crucial for understanding these experiments.
  • Traditional methods like transmission crystal spectrometers have limitations.

Purpose of the Study:

  • To evaluate a multilayer optic for X-ray diagnostics in laser-plasma experiments.
  • To assess the optic's ability to selectively pass X-rays within a specific energy range.
  • To compare the performance of the multilayer optic against existing technologies.

Main Methods:

  • A multilayer optic was designed and fabricated.
  • The optic was integrated into a laser-plasma experimental setup.
  • X-ray spectra were measured and analyzed.
  • A multilayer response model was developed, incorporating source size and spectral content.

Main Results:

  • The multilayer optic selectively passed X-rays between 55 and 100 keV.
  • An order of magnitude improvement in signal-to-noise ratio was achieved compared to a transmission crystal spectrometer.
  • The developed model accurately predicted the optic's performance.

Conclusions:

  • Multilayer optics offer a superior alternative for X-ray diagnostics in laser-plasma experiments.
  • The technology shows promise for applications at higher energies (above 500 keV).
  • Further development of multilayer optics could enhance our understanding of high-energy phenomena.