Energy deposition from microexplosion particle debris in the first wall on an inertially-confined fusion reactor

This paper presents a methodology for estimating the energy deposition in the first wall based on a Maxwellian energy distribution of the microexplosion particles. This energy distribution determines the time-of-arrival of the particles at the first wall. For given range-energy relationships of the various species of particles in the first wall material, the spatial and temporal distribution of the deposited energy can be determined. Range-energy curves are presented for alphas, deuterons and tritons in molybdenum, niobium, stainless steel, lithium and graphite. The depositions in the various first wall materials from a DT microexplosion with an average particle energy of 50 keV/amu are presented. Also discussed is the effect of higher and lower average particle energies on the deposition in first wall materials