Light curve of the Ca XIX w line. Flare heating flux is fixed at F₀ (=5.4 × 10⁹ ergs cm⁻² s⁻¹) for cases A and B, and at 5F₀ for cases C, D, and E. The dash‐dotted, dashed, and thin solid lines correspond to directly heated (I_heat), evaporated (I_evp), and accumulated (I_acm) plasma components, respectively. The thick solid line is the sum of these components. The dotted line is the maximum temperature at the apex. The vertical dotted line marks when each phase starts, and the vertical dashed line represents when the heat input terminates. Note the various vertical scales.