32-beam irradiation on a spherical heavy ion fusion pellet

Non-uniformity of ion beam irradiation on a direct-driven heavy ion fusion pellet was studied numerically in our previous paper (2003 Phys. Lett. A 315 372-7). The calculation results demonstrated that a sufficiently low non-uniform energy deposition ( < 2%) can be realized with a finite number of beams and determined a 32-beam irradiation system as the most interesting for practical application. A more particular analysis of that irradiation scheme is done in this paper. The simulation model is improved, including the temperature growth during the time of irradiation. A study of the beam focusing and beam emittance dependences on the non-uniformity of energy deposition is conducted.