New Fast Ignition of DT Fusion Reactions Considering TBR

چکیده مقاله

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 augmented
due 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 higher
electron temperature.Also conditions necessary to achieve D-T fuel self-sufficiency in fusion reactors are derived
through 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.

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