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The single-line-of-sight, time-resolved x-ray imager diagnostic on OMEGA.
W Theobald1, C Sorce1, M Bedzyk1
1Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
The Review of Scientific Instruments
|November 8, 2018
Summary
The single-line-of-sight, time-resolved x-ray imager (SLOS-TRXI) provides high-resolution imaging of inertial confinement fusion implosions. This diagnostic achieves 40-ps temporal and 10-μm spatial resolution, capturing core evolution without significant background noise.
Area of Science:
- Plasma Physics
- Fusion Energy Research
- High-Energy-Density Physics
Background:
- Inertial confinement fusion (ICF) experiments require advanced diagnostics to study implosion dynamics.
- Existing imaging techniques face limitations in temporal and spatial resolution for core region analysis.
Purpose of the Study:
- To introduce and characterize the single-line-of-sight, time-resolved x-ray imager (SLOS-TRXI) for ICF experiments.
- To evaluate the performance of SLOS-TRXI in imaging the stagnating core of cryogenic deuterium-tritium implosions.
Main Methods:
- Utilized an electron pulse-dilation imager coupled with a nanosecond-gated, burst-mode, hybrid complementary metal-oxide semiconductor sensor.
- Employed a pinhole imager for x-ray detection in the 4–9 keV range.
- Mounted the diagnostic perpendicular to a Kirkpatrick-Baez microscope for complementary imaging.
Main Results:
- Achieved approximately 40-picosecond temporal resolution.
- Demonstrated better than 10-micrometer spatial resolution.
- Successfully imaged implosion cores with neutron yields up to 1 × 10^14 without significant neutron-induced background.
Conclusions:
- SLOS-TRXI is a capable diagnostic for time-resolved x-ray imaging of ICF implosion cores.
- The diagnostic provides crucial data on the evolution of the stagnating core, enhancing understanding of fusion processes.
- SLOS-TRXI's performance supports its use in future high-yield ICF experiments.
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