Investigation on non-LTE radiation emitted from a laser-irradiated Au disk

Gu, Peng; Pei, Wenbing; Feng, Tinggui; Wu, Congcong

doi:10.1360/04yw0079

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…Besides of LARED, there are still two other codes which are used in our simulations. One is RDMG [8], a one-dimensional radiation hydrodynamic code with the radiation treated by multi-group transport, multi-group diffusion and conduction model. This code is used for research of problems such as laser-target coupling physics, capsule physics, radiation transport, radiation ablation, shock, and so on.…”

Section: Simulation Codes and Resultsmentioning

confidence: 99%

Numerical Simulation on Laser Fusion in China

Pei¹,

Yan²,

Gu³

et al. 2009

AIP Conference Proceedings

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Numerical simulation is a powerful tool to get insight into the physics of laser fusion. Much effort has been devoted to develop the numerical simulation code series named LARED in China. The code series LARED are composed of six parts and enable us to have the simulation capability for the key processes in laser fusion. In recent years, a number of numerical simulations using LARED have been carried out and the simulation is checked by experiments done at the laser facility SG-II and SG-III prototype. In the present talk, some details of LARED code series will be introduced, and some simulation results, especially recent work on the opacities, will be shown.

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Section: Simulation Codes and Resultsmentioning

confidence: 99%

Numerical Simulation on Laser Fusion in China

Pei¹,

Yan²,

Gu³

et al. 2009

AIP Conference Proceedings

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“…We perform post-shot simulations for the gas-filled and cryogenic layered capsules using the one-dimensional hydrodynamic code RDMG [34]. The radiation source used in the 1D simulations is derived from 2D hohlraum simulations with as-measured laser powers.…”

Section: Simulation Studiesmentioning

confidence: 99%

Demonstration of indirectly driven implosion experiments with cryogenic pure deuterium layered capsules on the Shenguang Laser Facility

Wang

et al. 2023

Nucl. Fusion

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To achieve ignition in a laboratory via inertial confinement fusion, a spherical capsule containing a frozen layer of deuterium and tritium (DT) fuel will be imploded on an MJ-class laser facility. However, if pure deuterium fuel can be used in place of DT fuel for tuning shots, we may speed up the process of ignition experiments while maintaining the surrogacy by significantly reducing the level of radioactivity. Unfortunately, it has long been assumed that neither the approach of symmetrical infrared irradiation used in the Omega direct-drive experiments nor the method of beta-layering used in the NIF experiments can be used to smooth the D layered capsule in cylindrical hohlraums. The difficulty in smoothing the D ice layer prevents us from taking advantage of cryogenic D-layered capsules in indirect-drive experiments. In this work, we established a procedure to form a uniform D-ice layer for capsules held in cylindrical hohlraums and carried out indirect-drive cryogenic D-layered implosion experiments using a squared laser pulse on the Shenguang laser facility in China. The quality of the D ice layer is characterized by phase-contrast imaging. The root-mean-square of the power spectrum in modes 2-100 is about 2.2μm. The implosion performance of the D-layered capsules is close to the prediction of one-dimensional simulations. The measured neutron yield and areal fuel density are 1.2×1011 and 80mg/cm2, respectively.

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Generation of a sharp density increase in radiation transport between high-Z and low-Z plasmas

Meng

Wang

et al. 2016

Matter and Radiation at Extremes

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A sharp density increase (referred to as density incrustation) of the Au plasmas in the radiative cooling process of high-Z Au plasmas confined by low-Z CH plasmas is found through the radiative hydrodynamic simulations. The temperature of Au plasmas changes obviously in the cooling layer while the pressure remains constant. Consequently, the Au plasmas in the cooling layer are compressed, and the density incrustation is formed. It is also shown that when the high-Z plasma opacity decreases or the low-Z plasma opacity increases, the peak density of the density incrustation becomes lower and the thickness of the density incrustation becomes wider. This phenomenon is crucial to the Rayleigh–Taylor instability at the interface of high-Z and low-Z plasmas, since the density variation of Au plasmas has a considerable influence on the Atwood number of the interface.

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Investigation on non-LTE radiation emitted from a laser-irradiated Au disk

Cited by 6 publications

References 19 publications

Numerical Simulation on Laser Fusion in China

Numerical Simulation on Laser Fusion in China

Demonstration of indirectly driven implosion experiments with cryogenic pure deuterium layered capsules on the Shenguang Laser Facility

Generation of a sharp density increase in radiation transport between high-Z and low-Z plasmas

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