学術雑誌論文

学術雑誌論文

High Energy Density Physics. 2024, 52, p. 101124

Effect of irradiation uniformity on quasi-isentropic shock compression of solid spheres

Elsevier B.V.

英語

2024-09-01

https://doi.org/10.1016/j.hedp.2024.101124

Takizawa R., Sakagami H., Nagatomo H., et al. Effect of irradiation uniformity on quasi-isentropic shock compression of solid spheres. High Energy Density Physics 52, 101124 (2024); https://doi.org/10.1016/j.hedp.2024.101124.

In inertial confinement fusion using central ignition, the ignition hot spot is generated through self-heating during fuel compression. In contrast, fast ignition creates the hot spot through external heating. This difference allows the fast ignition approach to use a solid sphere as the fusion fuel shape. The implosion of a solid sphere is one form of laser-direct-drive slow implosion. Solid sphere fuel exhibits tolerance to hydrodynamic instability and can be mass-produced relatively easily, offering significant advantages for developing inertial fusion energy. Achieving high fuel peak and areal densities of with a solid sphere requires quasi-isentropic compression, which involves multiple shock waves. Our results show the critical role of uniform laser irradiation in initiating weak shock waves in the early phase, which is essential for forming a uniform and dense fuel core with solid spheres. Furthermore, dynamically adjusting the laser spot diameter could be crucial in optimizing the effectiveness of laser-direct-drive and fast ignition techniques when using solid sphere fuel.

This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

98156

Effect of irradiation uniformity on quasi-isentropic shock compression of solid spheres

Elsevier B.V.

英語

2024-09-01

High Energy Density Physics

52

101124

https://doi.org/10.1016/j.hedp.2024.101124

https://hdl.handle.net/11094/98156