1. Suppression of Rayleigh–Taylor instability due to radiative ablation in brominated plastic targets
- Author
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Masakatsu Murakami, Yen-Wei Chen, Shinya Nozaki, Y. Tamari, Atsushi Sunahara, Naofumi Ohnishi, Yasukazu Izawa, Hiroshi Azechi, Katsunobu Nishihara, Keisuke Shigemori, Takeshi Watari, Shinsuke Fujioka, Takayoshi Norimatsu, Takeshi Yamada, Kazuki Okuno, Kazuto Otani, Mitsuo Nakai, Tatsuhiro Sakaiya, Keiji Nagai, Hiroyuki Shiraga, and Motohiro Tanaka more...
- Subjects
Physics ,Laser ablation ,Radiative transfer ,Rayleigh–Taylor instability ,Plasma ,Irradiation ,Radiation ,Atomic physics ,Condensed Matter Physics ,Instability ,Inertial confinement fusion - Abstract
Suppression of hydrodynamic instabilities is very crucial for the ultimate goal of inertial fusion energy (IFE). A high-Z doped plastic of CHBr (brominated polystyrene) ablator is a very promising candidate to suppress the ablative Rayleigh–Taylor (RT) instability in a directly laser-driven IFE target. When a CHBr target is irradiated by intense laser beams, bromine atoms in the corona plasma emit strong radiation. The strong radiation drives the radiative ablation front inside the CHBr targets. This radiative ablation in the high-Z doped plastic target has many advantages for the suppression of the growth of the RT instability in analogy to the indirect-drive approach, i.e., large mass ablation rate, long density scale length and low peak density. Two-dimensional (2D) hydrodynamic simulation shows significant suppression of the RT instability in a CHBr target compared to an undoped polystyrene (CH) target. RT growth rate, calculated theoretically using the Betti–Goncharov procedure with a one-dimensional... more...
- Published
- 2004
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