Simulation on interactions of X-ray and charged particles with first wall for IFE reactor

We have developed a simulation code to treat behaviors of wall ablation by X-rays, α particles and charged particles from fusion burning targets. The absorption of energy of α particles and charged particles by ablated wall plasmas was estimated using the stopping power obtained by dielectric functions of plasmas and Bethe formulas. We show that ablated wall material (Pb) moves as clump. We clarify that the screening effects of charged particles expanding from fusion burning by ablated wall material (Pb) decrease the ablation depth of liquid Pb compared with that of no screening effects.