Heavy Ion Beam Illumination Uniformity in Heavy Ion Beam Inertial Confinement Fusion

Abstract

In heavy ion beam (HIB) inertial confinement fusion (ICF), key issues include an accelerator design for an intense HIB, an efficient HIB transport, interaction between HIB and reactor gas, 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 the dependence of multi-HIB illumination non-uniformity on parameter values of HIB illumination. We investigate the energy deposition non-uniformity using 12, 20, 32, 60, 92 and 120-beam irradiation systems. In this study, effects of HIB temperature and emittance are also evaluated. The calculation results demonstrate that we can realize a sufficiently low non-uniform energy deposition, for example, less than 2[%] even for a 32-beam irradiation system using the Gaussian beam.

Non-Uniformity of Heavy-Ion Beam Irradiation on a Direct-Driven Pellet in Inertial Confinement Fusion

“…Also, RMS non-uniformities and deposited energy profiles of lead beams can be seen respectively in Figs. 13 and 14 for the 12-beam and 120-beam systems in a lead-aluminum pellet structure. 11 σRMSi and σPTVi and the profile of deposited energy of lead beams as functions of pellet radius for the 12beam system in an aluminum mono-layer target Fig.…”