New Fast Ignition of DT Fusion Reactions Considering TBR

Deuteron beam created by laser acceleration in fast ignition D-T fuels is proposed as an ignition mechanism. The fuel is assumed to have density 3 300g.cm  and a Maxwellian velocity distribution at a uniform temperature. The stopping powers of the fuel species for deuterons with high initial energy are evaluated and used to evaluate the energy deposited in the fuel. The energy deposition in the fuel reactants and the deposited energy is augmenteddue to the additional fusion reactions initiated by the beam particles. Results show that the extra energy from beam-target fusion reactions is important. The extra energy is more significant at lower beam energy and higherelectron temperature.Also conditions necessary to achieve D-T fuel self-sufficiency in fusion reactors are derivedthrough extensive modeling and calculations of the required and acievable tritium breeding ratios as functions of the many ractor parameters and candidate design concepts.It is found that the excess margin in the breeding potential is not sufficient to cover all present uncertainties.Thus the goal of attaining fuel self-sufficency significantly restricts the allowable the parameter space and design concepts

کلیدواژه ها:

Deuteron ، Fast ignition ، Bonus energy ، Tritium breeding