Experimental analysis of indirect-drive ablative Rayleigh-Taylor instability on Shenguang Ⅱ

Wu Junfeng; Miao Wenyong; Wang Lifeng; Cao Zhurong; Yu Xiaojin; Ye Wenhua; Zhen Wudi; Liu Jie; Wang Min; Jiang Shaoen; Pei Wenbing; Zhu Shaoping; Ding Yongkun; Zhang Weiyan; He Xiantu

doi:10.11884/HPLPB201527.032009

Volume 27 Issue 03

Mar. 2015

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Article Navigation > High Power Laser and Particle Beams > 2015 > 27(03): 032009

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Wu Junfeng, Miao Wenyong, Wang Lifeng, et al. Experimental analysis of indirect-drive ablative Rayleigh-Taylor instability on Shenguang Ⅱ[J]. High Power Laser and Particle Beams, 2015, 27: 032009. doi: 10.11884/HPLPB201527.032009

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Experimental analysis of indirect-drive ablative Rayleigh-Taylor instability on Shenguang Ⅱ

doi: 10.11884/HPLPB201527.032009

1.
Institute of Applied Physics and Computational Mathematics,Beijing 100094,China;
2.
Research Center of Laser Fusion,CAEP,Mianyang 621900,China;
3.
HEDPS,Center for Applied Physics and Technology,Peking University,Beijing 100871,China;
4.
China Academy of Engineering Physics,Mianyang 621900,China

Received Date: 2014-10-27
Rev Recd Date: 2014-12-01
Publish Date: 2015-02-10

Abstract

Abstract

A series of ARTI experiments have been performed in Shenguang Ⅱ(SGⅡ) laser facility of China. The simulation results from the LARED-S code for the planar foil trajectory experiment indicate that the energy flux at the hohlraum wall is obviously less than that at the laser entrance hole (LEH). Furthermore, the non-Planckian spectra of X-ray source can affect the dynamics of the foil flight and the perturbation growth. The images of evident growth of the ARTI initiated by a small-amplitude perturbation and the spike-bubble pattern initiated by large-amplitude perturbation were observed. The data of the growth of the second and the third harmonics were also obtained by increasing the spatial resolution in the experiments. The simulation results are in general consistent with the experimental results. The reliability of the LARRED-S code has been tested and validated through the comparison with the experiment results.
- inertial confinement fusion,
- hydrodynamic instabilities,
- Rayleigh-Taylor instability

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