Effects of secondary electrons in traveling wave direct energy converter for D-3He fusion reactor

Nuclear fusion is expected as a main energy source in the future. D-3He nuclear fusion has some better characteristics such as low neutron emission and capability of direct energy conversion than D-T or D-D nuclear fusion. The present paper studies effects of secondary electrons produced at grids of TWDEC (Traveling Wave Direct Energy Conversion) by the high-energy protons. It is found that the loss caused by the acceleration of electrons is about 1% of the input kinetic energy of protons, and effects of the electrical charge and the radiation are small. Therefore, all the effects are much smaller than the input power of protons. (author)