Modeling of time-dependent damage in structural wall of inertial fusion reactors and new tight binding model for SiC

New results on neutron intensities and energy spectra in structural wall materials versus time after inertial fusion (IFE) target emission are presented, showing differences between two IFE chamber protections (LiPb, Flibe). Key parameters and mechanisms are: density, moderation, and threshold reactions such as (n, 2n) and (n, 3n). Using computed time-dependent neutron intensities in the structural wall, we present a Multiscale Modeling study of pulse (1–10 Hz) irradiation in Fe, up to the level of defect microscopic characterization depending on time irradiation. Final responses of the microscopic structure after irradiation to 10−3 dpa are reported, and the differences with a continuous irradiation, for a still low irradiation fluence, are remarked. A new code based on tight binding molecular dynamics has been developed for studying SiC; and its first applications to different temperature-dependent situations demonstrates a reliable proof of principle of the new model. An efficient Multiscale Modeling systematic approach of SiC is lacking; starting with the absence of an appropriate description of defects and its diffusion. That goal can be obtained using this TBMD accurate tool.