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Updated: Jul 7, 2026
06:46
Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
Dynamic Hohlraums as x-ray sources in high-energy density science
J F Hansen1, S G Glendinning, R F Heeter
1Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
The Review of Scientific Instruments
|February 6, 2008
Summary
Laser driven dynamic Hohlraums (LDDH) provide a smooth x-ray backlighter for opacity and temperature measurements. This breakthrough is vital for astrophysics and fusion energy research at high temperatures.
Area of Science:
- Plasma Physics
- Astrophysics
- Fusion Energy
Background:
- Opacity and temperature measurements are critical for astrophysics and fusion energy.
- Existing backlighter sources have limitations in spectral smoothness and energy range.
Purpose of the Study:
- To demonstrate laser driven dynamic Hohlraums (LDDH) as a spectrally smooth x-ray backlighter source.
- To enable accurate opacity and temperature measurements at temperatures exceeding 150 eV.
Main Methods:
- Utilized LDDH filled with krypton or argon, imploded to generate an x-ray flash.
- Conducted experiments at the Omega laser facility to characterize the x-ray flash properties.
Main Results:
- Achieved a spectrally smooth x-ray emission extending to at least 5.5 keV.
- Demonstrated a small emission source size (<50 microm) and optimized duration (~100 ps).
- Emission brightness was sufficient for gated spectrometer measurements, exceeding previous backlighters.
Conclusions:
- LDDH is a viable and superior backlighter source for high-temperature material property measurements.
- This technology supports future astrophysics and ignition fusion experiments, particularly at the National Ignition Facility (NIF).
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