Fig. 1. Geometric optical arrangement diagram of laser beam platform

Fig. 2. General layout diagram of cluster platform scattered light diagnostic system

Fig. 3. Diffuse reflector structure used by different subsystems. (a) NBS1; (b) NBS2; (c) FABS

Fig. 4. Diagnostic optical path structure of NBS1

Fig. 5. Diagnostic optical path structure of NBS2 and FABS. (a) NBS2; (b) FABS

Fig. 6. Cluster physics experiment target and laser power parameters. (a) Back cover Au cavity; (b) laser power density curve with time

Fig. 7. Calculation results of plasma conditions at different moment. (a) 1.3 ns; (b) 2.3 ns; (c) 3.3 ns; (d) 4.3 ns

Fig. 8. Calculation results of spatial distribution of SBS scattered light under different mechanisms. (a) Subbeam mechanism; (b) bunching mechanism; (c) sharing of plasma waves; (d) sharing of scattered light

Fig. 9. Measurement results of typical spatial distribution of SBS scattered light. (a) Jigsaw results of FABS and NBS2 measurements at normalized strength; (b) NBS1 measurement results

Fig. 10. Typical time waveform and time-resolved spectral measurement results of SBS scattering light. (a) Time waveform; (b) time-resolved spectrum