Zifeng Song, Qi Tang, Bo Yu, Yunqing Xiao, Pinyang Liu, Tao Yi, Feng Wang. Simulation of Gamma Cherenkov Detector by Geant4 on 100 kJ Level Laser Facility[J]. Acta Optica Sinica, 2024, 44(2): 0204001
- Acta Optica Sinica
- Vol. 44, Issue 2, 0204001 (2024)
Fig. 1. Schematic of GCD structure and physical process
Fig. 2. Schematic of GCD measurement signal timing
Fig. 3. Simulated electron conversion efficiency for various convertor materials
Fig. 4. Simulated electron conversion efficiency for different thickness of C convertor
Fig. 5. Dependence of collected Cherenkov photon amount arrived at the end of gas cell on the gas length and gas diameter at a 6 MeV threshold energy. (a) Gas length; (b) gas diameter
Fig. 6. Simulation radial X/Y distribution of Cherenkov photons at different Z-positions along the axial direction of gas cell. (a) Z=5 cm; (b) Z=30 cm; (c) Z=55 cm; (d) Z=80 cm
Fig. 7. Normalized angular distribution of Cherenkov photons in each statistic unit along the axial direction of gas cell
Fig. 8. Normalized collection photon amount
Fig. 9. Comparison of collecting photon waveforms under two optimized parameters
Fig. 10. Simulation radial distribution of Cherenkov photons at the position of secondary mirror before and after reflection by primary mirror. (a) Before reflection by primary mirror; (b) after reflection by primary mirror
Fig. 11. Time interval
Fig. 12. Simulation results of collecting photon time waveforms before and after adding tungsten shield
Fig. 13. Simulated angular distribution of collected Cherenkov photons
Fig. 14. Simulated measurement signal by forward calculation method when electron threshold energy
Fig. 15. Dependence of detector sensitivity
Fig. 16. Dependence of detector sensitivity
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