Scope a tokamak fusion reactor concept: enter geometry and plasma parameters (major_radius_m, minor_radius_m, toroidal_field_T, plasma_current_MA, elongation, triangularity, density_1e20_m3, temperature_keV, heating_MW, tf_coils) and get plasma volume, safety factor q95, Greenwald density limit, normalised beta, confinement time (IPB98), triple product, fusion power, Q, peak coil field and required superconductor class, plus a 3D model of the plasma and magnets, a cross-section DXF and a component list. Defaults approximate ITER. Concept-level, scaling-law based. Cost: 1 credit per call.