Density profiles of our benchmark type Ia SNR at 1000 years. Panel (a) illustrates the result of the spatially dependent γ_eff scenario with γ_eff = 1.1 and z_shift = 0.5 pc, where z_shift marks the perpendicular distance in z-direction from the explosion center to the central horizontal line of the inefficient acceleration region. Panel (b) depicts the result of the density gradient scenario with a shift of the start point away from the explosion center in z-direction (z_shift = 0.5 pc). The color bars show the logarithm of density in units of m_H cm⁻³.