Fig. 1. The SOLPS computational mesh of HL-2A

Fig. 2. Variation of plasma parameters of divertor target with and without pumping(a) Electron temperature of the outer target, (b) Heat load of outer target, (c) Particle flux of outer target, (d) Electron temperature of the inner target, (e) Heat load of inner target, (f) Particle flux of inner target

Fig. 3. Variation of radiation power of divertor outer target (a) and inner target (b) with different pumping rates

Fig. 4. Changes of plasma parameters of divertor target at different upstream electron density(a) The electron density of outer target of divertor, (b) The electron temperature of outer target of divertor, (c) The ion density of outer target of divertor, (d) The electron density of inner target of divertor, (e) The electron temperature of inner target of divertor, (f) The ion density of inner target of divertor

Fig. 5. Variation of neutral particle parameters of divertor target before and after detachment at different upstream electron density(a) The deuterium atomic density of outer target of divertor, (b) The deuterium molecular density of outer target of divertor, (c) The deuterium atomic temperature of outer target of divertor, (d) The deuterium molecular temperature of outer target of divertor, (e) The neutral pressure of outer target of divertor, (f) The deuterium atomic density of inner target of divertor, (g) The deuterium molecular density of inner target of divertor, (h) The deuterium atomic temperature of inner target of divertor, (i) The deuterium molecular temperature of inner target of divertor, (j) The neutral pressure of inner target of divertor

Fig. 6. Distribution of the deuterium atomic density of divertor area(a) n_e,sep=0.19×10¹⁹m^-3without pumping, (b) n_e,sep=0.6×10¹⁹m^-3 without pumping, (c) n_e,sep=0.9×10¹⁹m^-3 without pumping, (d) n_e,sep=0.19×10¹⁹m^-3 with pumping, (e) n_e,sep=0.6×10¹⁹m^-3 with pumping, (f) n_e,sep=0.9×10¹⁹m^-3 with pumping

Fig. 7. Distribution of the deuterium molecular density of divertor area(a) n_e,sep=0.19×10¹⁹m^-3without pumping, (b) n_e,sep=0.6×10¹⁹m^-3 without pumping, (c) n_e,sep=0.9×10¹⁹m^-3 without pumping, (d) n_e,sep=0.19×10¹⁹m^-3 with pumping, (e) n_e,sep=0.6×10¹⁹m^-3 with pumping, (f) n_e,sep=0.9×10¹⁹m^-3 with pumping

Fig. 8. Distribution of the neutral pressure of divertor area(a) n_e,sep=0.19×10¹⁹m^-3without pumping, (b) n_e,sep=0.6×10¹⁹m^-3 without pumping, (c) n_e,sep=0.9×10¹⁹m^-3 without pumping, (d) n_e,sep=0.19×10¹⁹m^-3 with pumping, (e) n_e,sep=0.6×10¹⁹m^-3 with pumping, (f) n_e,sep=0.9×10¹⁹m^-3 with pumping

Table 1. Deuterium neutral reactions included in EIRENE