Fig. 1. Schematic of experimental setup used for measurements of radiation spectrum of Nd∶YAG laser-produced Hf plasma

Fig. 2. Experimental spectra of Nd∶YAG laser produced Hf plasmas in the 1.0 nm to 8.5 nm wavelength region

Fig. 3. Comparison of theoretical calculation spectra and experimental spectra of Hf XIV-Hf XXV

Fig. 4. Comparison of theoretical calculation spectra and experimental spectra of Hf XXVIII-Hf XXXVI

Fig. 5. Comparison of transition spectra and experimental spectra of Hf XXVIII-Hf XXXVI 4dⁿ-4d^n-15p

Fig. 6. Curves of Hf ion abundance with laser plasma electron temperature based on CRM model

Fig. 7. Numerical simulation results. (a) Electron temperature; (b) electron density

Fig. 8. Spatial distribution of electron temperature and electron density under different pulse laser power densities. (a) Electron temperature; (b) electron density