Top panel: Comparison of radial profiles of toroidal magnetization σ_tor (blue), Lorentz factor Γ (orange), rest-mass density ρ (green), and enthalpy h/ρ (red) at z = z_maxComparison of σ_tor/Γ² for jets with σ = 0.1 with an opening angle θ = 0.05, Lorentz factor Γ = 5. Bottom panel: Growth rate of the CFI as a function of axial wavenumber kR_c. Shaded vertical bands indicate the values of kR_c corresponding to azimuthal mode numbers m = 1 and m = 2 is, derived from the simulation jet radius R_j = 0.0567 and local curvature radius R_c = 16.86. The most unstable mode occurs at k_maxR_c ≈ 300.