Analysis of the small and large versions of the IGNITEX experiment

Small and large versions of the Fusion Ignition Experiment (IGNITEX) are defined with emphasis on their physics basis. The models used for their definition are given. Results of volume-averaged calculations and a probabilistic analysis are included. The small and large versions of the experiment are being considered in an effort to define both the smallest experiment that can produce fusion ignition under physics scaling pertinent to ohmically-heated, high-field tokamaks, and the smallest experiment that can produce fusion ignition using the most pessimistic extrapolation of the scaling laws based on the auxiliary heating L-mode database