Evolution of the BPX tokamak configuration

The present BPX (Burning Plasma Experiment) tokamak configuration represents the culmination of over six years of design study. During this period, many design options were examined. The significant design configurations are presented. These included a wedged/partial case machine with toroidal field (TF) and poloidal field (PF) conductors of a laminate construction, a modular bucked/case with Glidcop conductors, and modular wedged/partial case with beryllium copper (Be-Cu) TF/PF conductors. The rationale for studying a specific configuration, such as the physics requirements, and costs are explored, as well as their impact on the engineering design. An overview of the analysis performed is presented, as well as the important steps in the decision-making process. Particular emphasis is given to the selected configuration, i.e., the modular wedged/partial case with Be-Cu TF/PF conductors