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101 / 2023-04-13 20:55:24
Stabilization Of the Rayleigh-Taylor Instability in Laser-Driven Quasi-Isentropic Compression Experiments
laser-driven quasi-isentropic compression,material strength,Rayleigh-Taylor Instability
高压物理与材料科学 > 动高压-I
摘要录用
传盛 尹 / 中物院八所一部








Chuansheng Yin, Yongteng Yuan, Shaoyong Tu, Wenyong Miao, Yunsong Dong, Xiaoxi Duan and Zhebin Wang

Laser Fusion Research Center, Chinese Academy of Engineering Physics, Mianyang, 621900, China



As J. Edwards first reported in 2004,1 the high energy density of pulsed lasers can be used to generate quasi-isentropic loading in solids to high pressures but low temperatures, keeping the metal target at solid phase. This shockless compression technique can be used to study material strength under extremely high pressure.2-4 On the SG series laser facility in the Laser Fusion Research Center(LFRC), the energy of a short laser pulse is used to drive a strong shock trough a platic reservoir which unloads at the back surface, expands across a 400 μm vacuum gap and stagnates against the aluminium target. Two different metal targets were used in this study. For flat aluminium foils, Velocity Interferometer System for Any Reflectors(VISAR) was used to measure the particle velocity of the target back surface. The peak pressure was about 1.3 Mbar. For sinusoidal distrubance interface, several shots at different time    were conducted to measure RT instability growth by side-on radiography, using high-resolution spherically bent crystal monochromatic imaging system with 5.2keV vanadium backlight. Experimental results indicate strong stabilization of the RT instability growth rate which can be explained by the enhanced material strength of metal foils due to phonon drag.



1. J. Edwards et al., “Laser-Driven Plasma Loader for Shockless Compression and Acceleration of Samples in the Solid State,” Physical Review Letters, 2004, 92, 075002

2. Raymond F. Smith et al., “High planarity x-ray drive for ultrafast shockless-compression experiments,” 2007, 14, 057105

3. Hye-Sook Park et al., “Strong stabilization of the Rayleigh-Taylor instability by material strength at megabar pressures,” 2010, Physics of Plasmas, 92, 056314

4. Bruce A. Remington et al., “Rayleigh-Taylor instabilities in high-energy density settings on the National Ignition Facility,” 2018, PNAS, 10, 1073

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* Work supported by the National Natural Science Foundation of China (Grant No. 12205275)

重要日期

  • 会议日期

    06月05日

    2023

    至

    06月09日

    2023

  • 04月30日 2023

    提前注册日期

  • 05月01日 2023

    摘要截稿日期

  • 05月01日 2023

    摘要录用通知日期

  • 05月01日 2023

    初稿截稿日期

  • 05月31日 2023

    注册截止日期

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