Potential Structure and Radial Profile of Neutron Production Rate in Spherical Inertial Electrostatic Confinement Plasmas

摘要

The radial profile of neutron production rate in spherical inertial electrostatic confinement (SIEC) plasmas is investigated considering both of the beam (fuel ion)-beam and beam-target (background gas) fusion. The electrostatic potential is obtained by solving the Poisson equation, and by using the potential; fuel-ion velocity distribution function is determined at each radial point. From the velocity distribution function, the neutron production rate is evaluated. Numerical results show that although the total (volume-integrated) neutrons produced by beam-beam fusion are considerably lower than those of beam-target fusion, the effect of the beam-beam fusion on radial profile of the neutron production rate can be notable.