A preliminary assessment of the sensitivity of uniaxially driven fusion targets to flux-limited thermal conduction modeling
| Autor: | D. H. Vassilev, N. Joiner, Nicholas Niasse, D. A. Chapman, J. D. Pecover, Jeremy Chittenden, Nitin Dutt Chaturvedi, Martin Read, N. Hawker |
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| Rok vydání: | 2021 |
| Předmět: |
Fluids & Plasmas
FOS: Physical sciences RELAXATION HYDRODYNAMICS CODE 0203 Classical Physics Physics Fluids & Plasmas 0201 Astronomical and Space Sciences Neutron DENSE Diffusion (business) Inertial confinement fusion Physics Fusion Science & Technology Microphysics Operator (physics) Plasma EQUATION-OF-STATE Condensed Matter Physics Thermal conduction Physics - Plasma Physics TRANSPORT Computational physics Plasma Physics (physics.plasm-ph) Physical Sciences 0202 Atomic Molecular Nuclear Particle and Plasma Physics PACKAGE |
| Zdroj: | Physics of Plasmas. 28:072702 |
| ISSN: | 1089-7674 1070-664X |
| Popis: | The role of flux-limited thermal conduction on the fusion performance of the uniaxially-driven targets studied by Derentowicz et al.; Jour. Tech. Phys. 18, 465 (1977) and Jour. Tech. Phys. 25, 135 (1977), is explored as part of a wider effort to understand and quantify uncertainties in ICF systems sharing similarities with First Light Fusion's projectile-driven concept. We examine the role of uncertainties in plasma microphysics and different choices for the numerical implementation of the conduction operator on simple metrics encapsulating the target performance. The results indicate that choices which affect the description of ionic heat flow between the heated fusion fuel and the gold anvil used to contain it are the most important. The electronic contribution is found to be robustly described by local diffusion. The sensitivities found suggest a prevalent role for quasi-nonlocal ionic transport, especially in the treatment of conduction across material interfaces with strong gradients in temperature and conductivity. We note that none of the simulations produce neutron yields which substantiate those reported by Derentowicz et al. Jour. Tech. Phys. 25, 135 (1977), leaving open future studies aimed at more fully understanding this class of ICF systems. Comment: 14 pages, 7 figures, submitted to Physics of Plasmas |
| Databáze: | OpenAIRE |
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