Traditional Inertial Confinement Fusion (ICF) schemes face bottlenecks such as difficulties in suppressing Rayleigh-Taylor (RT) instability, low energy coupling efficiency, and high manufacturing costs. This study proposes a novel low-gain ignition scheme based on Structural-Dynamical Synergistic Modulation (SDSM). By constructing a three-layer target capsule structure consisting of a “high-Z porous ablator - gradient impedance-matching fuel layer - high-density degenerate core” and introducing Controlled Nonlinear Turbulence Seeding (CNTS) technology, the optimization of shockwave transmission efficiency and the non-uniform enhancement of fuel areal density are achieved.
The theoretical model indicates that through an Isentropic Compression Trajectory (ICT) and Dynamic Phase Transition Critical Control (DPTCC), this scheme can achieve an energy gain factor Q ≈ 6-7 while reducing laser input energy by 30% (to 0.75 MJ). The target capsules utilize readily available materials (foam gold, deuterium-tritium ice) and conventional micro-fabrication techniques, with a single unit cost controlled within 35 Chinese Yuan, representing a 99.8% reduction compared to existing NIF targets. This research provides a new technological pathway for low-threshold, high-repetition-rate inertial fusion energy applications.
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