Indirect-drive ablative Rayleigh-Taylor growth experiments on the Shenguang-II laser facility

Journal Article · Tue Apr 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4871721· OSTI ID:22253091

Wu, J. F.; Fan, Z. F.; Zheng, W. D.; Wang, M.; Pei, W. B.; Zhu, S. P.; Zhang, W. Y. ^[1]; Miao, W. Y.; Yuan, Y. T.; Cao, Z. R.; Deng, B.; Jiang, S. E.; Liu, S. Y.; Ding, Y. K. ^[2]; Wang, L. F.; He, X. T. ^[1]

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1. Institute of Applied Physics and Computational Mathematics, Beijing 100094 (China)
2. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 (China)

In this research, a series of single-mode, indirect-drive, ablative Rayleigh-Taylor (RT) instability experiments performed on the Shenguang-II laser facility [X. T. He and W. Y. Zhang, Eur. Phys. J. D 44, 227 (2007)] using planar target is reported. The simulation results from the one-dimensional hydrocode 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. Furthermore, the non-Planckian spectra of x-ray source can strikingly affect the dynamics of the foil flight and the perturbation growth. Clear images recorded by an x-ray framing camera for the RT growth initiated by small- and large-amplitude perturbations are obtained. The observed onset of harmonic generation and transition from linear to nonlinear growth regime is well predicted by two-dimensional hydrocode simulations.

• OSTI ID: 22253091
• Journal Information: Physics of Plasmas, Vol. 21, Issue 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
FOILS
HARMONIC GENERATION
LASERS
PERTURBATION THEORY
RAYLEIGH-TAYLOR INSTABILITY
SIMULATION
SPECTRA
X RADIATION
X-RAY SOURCES