Suppression of the Rayleigh–Taylor instability and its implication for the impact ignition
| Autor: | Y. Izawa, Hiroyuki Shiraga, K Ohtani, Atsushi Sunahara, Hiroshi Azechi, Keisuke Shigemori, Shinsuke Fujioka, Katsunobu Nishihara, Hideo Nagatomo, T. Sakaiya, N. Miyanaga, Y. Tamari, Masakatsu Murakami, Mitsuo Nakai |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
business.industry medicine.medical_treatment Electron Fusion power Radiation Condensed Matter Physics Ablation Instability law.invention Ignition system Wavelength Optics Nuclear Energy and Engineering Physics::Plasma Physics law medicine Rayleigh–Taylor instability Atomic physics business |
| Zdroj: | Plasma Physics and Controlled Fusion. 46:B245-B254 |
| ISSN: | 1361-6587 0741-3335 |
| DOI: | 10.1088/0741-3335/46/12b/021 |
| Popis: | The Rayleigh–Taylor (RT) instability with material ablation through an unstable interface is the key physics that determines the success or failure of inertial fusion energy (IFE) generation, as the RT instability potentially quenches ignition and burn by disintegrating the IFE target. We present two suppression schemes of the RT growth without significant degradation of the target density. The first scheme is to generate a double ablation structure in high-Z doped plastic targets. In addition to the electron ablation surface, a new ablation surface is created by x-ray radiation from the high-Z ions. Contrary to the previous thought, the electron ablation surface is almost completely stabilized by extremely high flow velocity. On the other hand, the RT instability on the radiative ablation surface is significantly moderated. The second is to enhance the nonlocal nature of the electron heat transport by illuminating the target with long wavelength laser light, whereas the high ablation pressure is generated by irradiating with short wavelength laser light. The significant suppression of the RT instability may increase the possibility of impact ignition which uses a high-velocity fuel colliding with a preformed main fuel. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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