Study on two-dimensional transfer of radiative heating wave

Lan, Ke; Feng, Tinggui; Lai, Dongxian; Meng, Xin-He

doi:10.1017/s026303460505038x

Cited by 13 publications

(1 citation statement)

References 15 publications

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“…Figure 3 shows the simulated temporal behavior of the density and temperature at the center and boundary of the constrained Al sample. The radiation in the Hohlraum was simulated first by a three-dimensional x-ray Monte Carlo transfer code RT3D, 23 then the radiation passing through the CH baffles was simulated by a two-dimensional multigroup transport code LARED-R-1, 24 finally the temperature and density of the radiation-heated Al sample were simulated by one-dimensional multigroups transport code RDMG. 25 It can be seen from the figure that the density and temperature of the sample quickly reach homogeneity.…”

Section: Hydrodynamic Simulationsmentioning

confidence: 99%

Diagnostic development in precise opacity measurement of radiatively heated Al plasma on Shenguang II laser facility

Zhao

Yang

Zhang

et al. 2009

Review of Scientific Instruments

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Simultaneous measurements of the self-emission spectrum, the backlighting source spectrum, and the transmission spectrum in one shot, which reduce the experimental uncertainties from shot-to-shot fluctuation, are essential for precise opacity experiments. In order to achieve precise absorption spectrum of Al plasmas, a special half sample sandwich target was designed and short backlighter was used to provide time- and space-resolving diagnostics on the Shenguang II high power laser facility. In the measurement, a cylindrical cavity with CH foam baffles was used to provide a clean x-ray radiation environment for sample heating. The x-ray source spectrum, the transmission spectrum, and the self-emission spectrum of the soft x-ray heated Al sample were recorded in one shot with a penta-erythritol tetrakis (hydroxymethy) methane C(CH(2)OH)(4) (PET) crystal spectrometer by using the point-projection method. Experimental results have been compared with the calculation results of a detailed level accounting opacity code.

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Section: Hydrodynamic Simulationsmentioning

confidence: 99%

Diagnostic development in precise opacity measurement of radiatively heated Al plasma on Shenguang II laser facility

Zhao

Yang

Zhang

et al. 2009

Review of Scientific Instruments

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First experimental comparisons of laser-plasma interactions between spherical and cylindrical hohlraums at SGIII laser facility

Chen

Xie

et al. 2017

Matter and Radiation at Extremes

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We present our recent laser-plasmas instability (LPI) comparison experiment at the SGIII laser facility between the spherical and cylindrical hohlraums. Three kinds of filling are considered: vacuum, gas-filling with or without a capsule inside. A spherical hohlraum of 3.6 mm in diameter, and a cylindrical hohlraum of 2.4 mm × 4.3 mm are used. The capsule diameter is 0.96 mm. A flat-top laser pulse with 3 ns duration and up to 92.73 kJ energy is used. The experiment has shown that the LPI level in the spherical hohlraum is close to that of the outer beam in the cylindrical hohlraum, while much lower than that of the inner beam. The experiment is further simulated by using our 2-dimensional radiation hydrodynamic code LARED-Integration, and the laser back-scattering fraction and the stimulated Raman scatter (SRS) spectrum are post-processed by the high efficiency code of laser interaction with plasmas HLIP. According to the simulation, the plasma waves are strongly damped and the SRS is mainly developed at the plasma conditions of electron density from 0.08 nc to 0.1 nc and electron temperature from 1.5 keV to 2.0 keV inside the hohlraums. However, obvious differences between the simulation and experiment are found, such as that the SRS back-scattering is underestimated, and the numerical SRS spectrum peaks at a larger wavelength and at a later time than the data. These differences indicate that the development of a 3D radiation hydrodynamic code, with more accurate physics models, is mandatory for spherical hohlraum study.

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Two-photon group radiation transfer study in low-density foam cylinder

et al. 2006

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Radiation transfer in low-density foam is influenced by the external radiation field which impacts on the foam when the size of plasma created in laboratory is not large to be opatical thick. The radiation transfers of different photon groups are sensitive probes of the conditions of the medium through which they propagate. The temporal behavior of photon groups to which the plasma is optical thin is quite different from that of photon groups to which the plasma is optical thick. The breakout times of different photon groups through the foam are distinguishable different in experiment when we measures them at the end of foam. The multi-group supersonic radiation transfer behavior in low-density foam is studied both by multi-group transfer numerical simulation and experiments. Two characteristic photon groups are chosen to do experimental research on the multi-group transfer behavior in low-density CH foam. A time-resolved chromatic streaked X-ray spectrometer measure the breakout of the two photon group from the far end of the foam cylinder. The distinguishable transfer time delay between two groups is observed.

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Study on two-dimensional transfer of radiative heating wave

Cited by 13 publications

References 15 publications

Diagnostic development in precise opacity measurement of radiatively heated Al plasma on Shenguang II laser facility

Diagnostic development in precise opacity measurement of radiatively heated Al plasma on Shenguang II laser facility

First experimental comparisons of laser-plasma interactions between spherical and cylindrical hohlraums at SGIII laser facility

Two-photon group radiation transfer study in low-density foam cylinder

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