The physical and engineering aspects of fusion engineering test facility based on mirror confinement (FEF)

A conceptual design study of 14-MeV neutron source (FEF) of compact DDT plasma based on the mirror confinement is carried out to clarify the critical issues both in plasma physics and engineering. Characteristic features of FEF-II are (i) use of RF pondermotive force for MHD stability, (ii) use of water for radiation shield of SC coil and (iii) use of end electrode system including plasma direct energy conversion. Several sets of plasma parameters are obtained under the variety of conditions from the most pessimistic case where the charge exchange (CX) loss of ions is dominant to the most optimistic case where the CS loss is negligible. The engineering feasibility is studied for the pessimistic case. It is found that most of the engineering are feasible in the optimistic case, and that even in the pessimistic case by increasing plasma parameters there is possibility to meet engineering requirement