Effect of load plasma disturbance on radiation temperature in Z-pinch dynamic hohlraum
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摘要: 通过二维辐射流体力学模拟研究了Z箍缩动态黑腔负载等离子体撞击泡沫柱的动力学过程，探索了带扰动负载等离子体形状对黑腔内辐射温度的影响。结果表明，带有扰动的负载等离子体撞击泡沫后会产生Rayleigh-Taylor（RT）流体不稳定性，导致动态黑腔内的辐射在负载等离子体光薄区域发生漏失，使黑腔内辐射温度降低；负载等离子体扰动振幅越大、波长越大，辐射漏失越严重，同等动能加载条件下黑腔内辐射温度也越低。
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关键词:
- Z箍缩 /
- 动态黑腔 /
- 等离子体扰动 /
- 辐射漏失 /
- Rayleigh-Taylor不稳定性
Abstract: The dynamic process of load plasma impacting on the foam cylinder was studied by two-dimensional radiation hydrodynamics simulation, and the influence of the shape of load plasma with disturbance on the radiation temperature in dynamic hohlraum was explored. The results show that Rayleigh-Taylor fluid instability will be generated after the disturbed load plasma impacting on the foam, and the development of RT instability will lead to the radiation leakage in the light-thin region of the load plasma, which will reduce the radiation temperature in the dynamic hohlraum. The larger the amplitude and the wavelength of disturbance in the load plasma, the more serious radiation leakage occurs, and the lower the radiation temperature will be in the dynamic hohlraum under the same kinetic energy loading condition.-
Key words:
- Z-pinch /
- dynamic hohlraum /
- plasma disturbance /
- radiation leakage /
- Rayleigh-Taylor instability
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图 1 负载等离子体撞击泡沫模拟示意图
Figure 1. Schematic diagram of simulation of loaded plasma impinging on foam
图 2 t =3 ns时刻，高度z=0.3 cm处的压强(p)和辐射温度(Tr)的径向分布图
Figure 2. Radial distribution diagram of pressure (p) and radiation temperature (Tr) at t =3 ns and z=0.3 cm
图 3 z=0.3 cm、r=0.2 cm处动态黑腔内辐射温度(Tr)演化图
Figure 3. Evolution diagram of radiation temperature (Tr) in dynamic hohlraum at z= 0.3 cm and r= 0.2 cm
图 4 W等离子体撞击泡沫柱后不同时刻辐射温度(K)分布云图
Figure 4. Distribution cloud diagram of radiation temperature (K) at different time (t) after W plasma impinging on foam column
图 5 在t =4.5 ns时刻，高度z=0.3 cm处压强和密度径向分布
Figure 5. Radial distribution of pressure and density at time t =4.5 ns and height z=0.3 cm)
图 6 带扰动的负载撞击泡沫模拟示意图
Figure 6. Schematic diagram of load plasma with disturbance impacting foam
图 7 负载上不同扰动振幅下动态黑腔内的辐射温度 (Tr)演化
Figure 7. Radiation temperature (Tr) evolution in a dynamic hohlraum under different perturbation amplitudes on load
图 8 t=5 ns时刻不同初始扰动振幅(A)下密度分布云图
Figure 8. Cloud image of density distribution under different initial disturbance amplitudes (A) at time t=5 ns
图 9 t=5 ns时刻不同初始扰动振幅(A)下辐射温度 (Tr) 分布云图
Figure 9. Radiative temperature (Tr) distribution cloud at time t=5 ns with different initial disturbance amplitudes
图 10 负载上不同扰动波长(
$ \lambda $ )下动态黑腔辐射温度演化(r=0.1 cm)Figure 10. Radiation temperature evolution of dynamic hohlraum under different disturbance wavelengths (
$ \lambda $ ) on load
图 11 波长分别为0.2 cm和0.1 cm不同时刻下密度云图
Figure 11. Density contour at different time under disturbance wavelengths
$\lambda {\text{ = }}0.2$ cm and$\lambda {\text{ = }}0.1$ cm on load -
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