Abstract:
Background The dual-axis VISAR diagnostic technology can simultaneously diagnose the shock wave velocity history in different regions of the target and perform in-situ characterization of the temporal asymmetry during the implosion shock wave loading process. It is an important diagnostic technology in inertial confinement fusion (ICF) experimental research.
Purpose The integrated implosion experiments of the Shenguang Ten-Thousand-Joule Facility typically use target pellets with an inner diameter of approximately 850 micrometers (μm), and smaller target sizes pose greater challenges to the establishment of the dual-axis VISAR diagnostic technology. Focusing on the small-sized target used in small laser facilities, this paper conducts research on the dual-axis VISAR diagnostic technology.
Methods We established an imaging simulation model. Based on this model, a detailed analysis of three typical influencing factors is conducted, which provides guidance for target design.
Results Relying on the cavity target structure of small-sized target, the shock wave velocity histories in the equatorial and polar regions are obtained through diagnostics. The comparison of shock wave loading symmetry under different driving conditions is completed.
Conclusions Based on this study, the technical challenges of dual-axis VISAR diagnostics have been addressed through simulation and optimization design. The experiments validated in-situ characterization techniques for shock-wave loading symmetry, establishing a diagnostic foundation for subsequent optimization of cavity structures and drive waveforms.
下载: