Abstract
Key issues in heavy-ion beam (HIB) inertial confinement fusion (ICF) include an accelerator design for an intense HIB, an efficient HIB transport, a HIB-target interaction, a reactor design, and so on. In this paper, three-dimensional computer simulations are performed for a HIB irradiation onto a direct-driven spherical fuel pellet in HIB-ICF in order to clarify dependence of multi-HIB illumination nonuniformity on parameter values of HIB illumination. For various beam parameters and reactor chamber radii we investigate the energy deposition nonuniformity using 12, 20, 32, 60, 92, and 120-beam irradiation systems. In this study, the effects of HIB temperature, HIB illumination systems, HIB emittance, and pellet temperature on the HIB illumination nonuniformity are also evaluated. In addition, the nonuniformity growth due to a little pellet displacement from a reactor chamber center is investigated. The calculation results demonstrate that we can realize a rather low nonuniform energy deposition, for example, less than 2.0 % even for a 32-beam irradiation system.
Highlights
Key issues in heavy-ion beam (HIB) inertial confinement fusion (ICF) include an accelerator design for intense HIBs, efficient HIB transport, a HIB-target interaction, a reactor design, and so on [1,2,3,4,5,6,7,8,9,10,11]
We focus on a HIB-target interaction in ICF
In HIB-ICF, the beam irradiation nonuniformity on a direct-driven fuel pellet must be suppressed under a few percent in order to achieve a symmetric fuel pellet implosion [7,12,13,14,15,16,17]
Summary
Key issues in heavy-ion beam (HIB) inertial confinement fusion (ICF) include an accelerator design for intense HIBs, efficient HIB transport, a HIB-target interaction, a reactor design, and so on [1,2,3,4,5,6,7,8,9,10,11]. In this study, we simulate a HIB illumination on the spherical direct-driven target using 12, 20, 32, 60, 92, and 120-beam irradiation systems. In the fuel pellet implosion the HIB energy deposition nonuniformity should be suppressed to less than a few percent [7,15–. In this paper we perform three-dimensional analyses of the HIB illumination nonuniformity in HIB-ICF in order to know the detailed information of energy nonuniformity on a spherical fuel target. A three-dimensional computer code is developed for the simulation of a HIB irradiation onto a spherical fuel pellet in direct-driven heavy-ion fusion. The simulation results present the fact that the HIB deposition-energy rms nonuniformity on the target is suppressed to a low value, for example, less than 2.0%.
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