245 / 2023-04-19 14:52:54

Study of Fast Electron Transport in Double-Cone Ignition Experiments

Double-Cone Ignition、Gold cone-guided、 heating、transport of fast electrons、sheath field

惯性约束聚变物理学 > 惯性约束聚变物理学-海报

The Double-Cone Ignition (DCI) scheme [1] uses a Petawatt laser to interact with a gold cone, generating a fast electron beam that rapidly heats and increases the temperature of the pre-compressed high-density plasma for achieving fusion ignition. The characteristics of the fast electron beam, such as its temperature, yield, and divergence angle, and its transport within the high-density plasma, are critical scientific issues that directly determine the heating efficiency. To optimize the process, we systematically studied and optimized the yield, energy spectrum, and conversion efficiency of the fast electron beam by comparing different target shapes, such as flat gold planes and guided gold cones, and laser parameters. Our results show that the fast electron beam generated from the flat gold plane has a higher temperature than that from the gold cone. Additionally, the sheath field can cause the fast electron beam to diverge, leading to increased divergence angles and reduced transmission efficiency.