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Dopant radiative cooling effects in indirect-drive Ar-doped capsule implosion experiments
J J MacFarlane1, I E Golovkin, R C Mancini
1Prism Computational Sciences, Inc., 455 Science Drive, Suite 140, Madison, Wisconsin 53711, USA.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 21, 2006
Summary
Simulations show that argon (Ar) dopant concentration affects inertial confinement fusion capsule implosion performance. Varying Ar levels impacts fuel conditions and neutron yield, providing insights for optimizing fusion experiments.
Area of Science:
- Plasma Physics
- Nuclear Fusion
- Computational Physics
Background:
- Inertial confinement fusion (ICF) aims to achieve controlled fusion reactions.
- Indirect-drive ICF relies on capsule implosions driven by X-rays.
- Dopants are used to diagnose and potentially enhance ICF implosions.
Purpose of the Study:
- To investigate the impact of argon (Ar) dopant radiative cooling on ICF indirect-drive capsule implosions.
- To analyze the sensitivity of fuel conditions and neutron yield to Ar concentration.
- To compare simulation results with experimental data from OMEGA.
Main Methods:
- Utilized a 1D radiation-hydrodynamics code with inline collisional-radiative modeling.
- Computed non-local thermodynamic equilibrium atomic kinetics and spectral characteristics for Ar-doped Deuterium-Deuterium (DD) fuel.
- Performed simulations varying Ar concentration and compared with OMEGA experimental data (monochromatic imaging, spectral measurements).
Main Results:
- Simulation results demonstrate the sensitivity of electron temperature and neutron yield to Ar dopant concentration.
- Calculated spectral characteristics and fuel conditions were analyzed.
- Comparison with OMEGA experimental data validated simulation models.
Conclusions:
- Argon dopant concentration is a critical parameter influencing ICF implosion performance.
- The study provides a detailed understanding of dopant radiative cooling effects.
- Results inform future ICF experiment design and optimization for enhanced fusion yields.