ENERGETIC ALPHA-TRANSPORT IN A MAGNETIZED FUSION TARGET

Magnetized target fusion (MTF) promises to ease the power and intensit y requirements for a fusion driver. High gain MTF targets require fusi on ignition to occur in the magnetized fuel. Ignition requires the ene rgy deposited by the charged fusion reaction products to exceed that l ost from the plasma by a variety of loss mechanisms. We have used sing le particle tracking through a magnetized plasma to obtain preliminary results on the DT alpha particle deposition as a function of the plas ma rho R and BR for a uniform spherically symmetric volume with a unif orm B-theta magnetic field. More complicated plasma density, temperatu re, and field distributions can be handled by the code, including 2-D distributions, but the efficiency of this approach makes extensive cal culations impractical. A more efficient approach is needed, particular ly for use in dynamic calculations. However, particle tracking is usef ul for obtaining information for building more accurate models of the deposition for use in survey codes.