Characteristic quantities for the 9000 simulations of the rain bow. (a) Maximum temperature, (b) maximum electron number density, and (c) average velocity, computed around the loop apex (z > 0.9z_max) during the second half of each simulation (t > 36 h). (d) Event classification: no TNE behaviour (□), formation of a prominence-like structure (), TNE cycles with () and without () coronal rain, and simulations that failed because of numerical issues (). Each sub-figure contains 40 squares, corresponding to the eight line geometries (columns), and the five values of H₁/H₀ (rows). Each square contains 225 simulations for the different values of λ₁ (y-axis) and λ₂ (x-axis), ranging from 1% of the loop length (top left) to 20% of the loop length (bottom right). The solid lines on (d) correspond to λ₁ = λ₂. The dashed lines correspond to λ₁ = 0.73λ₂. The square marked with a star (⋆) corresponds to the 225 simulations shown in Fig. 3a.