Fig. 1. Experimental arrangement^[2]

Fig. 2. Experimental setup (direct). The locations of two spectrometers relative to the lasers and target are marked^[5]

Fig. 3. Energy spectra of electrons and positrons^[5]

Fig. 4. Experimental setup (direct)^[6]

Fig. 5. Positron energy distributions beled from A to F. Experimental setup^[6]

Fig. 6. Positron angles distributions^[6]

Fig. 7. Experimental setup (indirect)^[4]

Fig. 8. Electron and positron energy distributions^[4]

Fig. 9. Scheme figure of the experiment^[8]

Fig. 10. Experimental (solid lines) and simulated (dashed lines) positron spectra^[8]

Fig. 11. Illustration of two laser-positron generation schemes^[7]