Suppression of Rayleigh–Taylor instability due to radiative ablation in brominated plastic targets
Suppression of Rayleigh–Taylor instability due to radiative ablation in brominated plastic targets
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DOI：
10.1063/1.1705654
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发表时间：
2004-04
影响因子：
2.2
通讯作者：
S. Fujioka;A. Sunahara;N. Ohnishi;Y. Tamari;K. Nishihara;H. Azechi;H. Shiraga;M. Nakai;K. Shigemori;T. Sakaiya;Motohiro Tanaka;K. Otani;Kazuki Okuno;T. Watari;Takeshi Yamada;M. Murakami;K. Nagai;T. Norimatsu;Y. Izawa;S. Nozaki;Yen-Wei Chen
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文献类型：
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作者：
S. Fujioka;A. Sunahara;N. Ohnishi;Y. Tamari;K. Nishihara;H. Azechi;H. Shiraga;M. Nakai;K. Shigemori;T. Sakaiya;Motohiro Tanaka;K. Otani;Kazuki Okuno;T. Watari;Takeshi Yamada;M. Murakami;K. Nagai;T. Norimatsu;Y. Izawa;S. Nozaki;Yen-Wei Chen
抑制流体动力学不稳定性是实现惯性聚变能（IFE）最终目标的关键。溴化聚苯乙烯（CHBr）烧蚀塑料是抑制激光直接驱动IFE靶烧蚀瑞利-泰勒（RT）不稳定性的一种很有希望的材料。当CHBr靶被强激光束照射时，电晕等离子体中的溴原子发出强辐射。强辐射驱动CHBr靶内的辐射烧蚀前沿。与间接驱动方法类似，高Z掺杂塑料靶中的这种辐射烧蚀对于抑制RT不稳定性的增长具有许多优点，即，质量消融速率大，密度刻度长，峰值密度低。二维（2D）流体动力学模拟显示出显着抑制的RT不稳定性的CHBr目标相比，未掺杂的聚苯乙烯（CH）的目标。RT增长率，理论上使用Betti-Goncharov程序与一维计算...
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...