Resolution in our fiducial CHEM_MHD simulation (Table 1) at t = 196 Myr. Top: spatial resolution as a function of total gas density. r_cell is the radius of a sphere with the same volume as the cell. The horizontal black dashed line indicates the volume limit of the cells (Sect. 2.2). Middle: mass of cells as a function of density. In both panels, blue contours are for the region at R > 0.5 kpc with a target mass of 100 M_⊙, while red contours are for the R < 0.5 kpc with higher resolution at a target mass of 10 M_⊙ (Sect. 2.2). Bottom: λ_MRI/r_cell as a function of density for cells in the CMZ (R < 0.5 kpc), where λ_MRI = 2πυ_A/Ω. is the characteristic wavelength of the MRI, υ_A is the Alfven speed, and Ω = υ_ϕ/R is the angular velocity of each gas cell. We see that the MRI is well resolved in the CMZ. The contours contain [100, 99, 90, 75, 50, 25] % of the total number of cells.