2-D Numerical Investigation of the Formation of Z-Pinch-Driven Dynamic Hohlraum at 8-MA Current Level

Ning, Cheng; Chen, Zhongwang

doi:10.1109/tps.2018.2871217

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…The cathode is based on a flat disk LaB 6 insert, emitting electrons via thermionic emission after being sufficiently heated by a tungsten wire heater. Few studies are available on discharge characterization of cathodes with disk-shaped emitters [10,11], although this design is used by several research teams [12,13,14,15]. Moreover, the influence of anode position on cathode discharge mode is poorly documented in the literature [16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Anode position influence on discharge modes of a LaB6 cathode in diode configuration

Potrivitu

Joussot

Mazouffre

2018

Vacuum

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Section: Introductionmentioning

confidence: 99%

Anode position influence on discharge modes of a LaB6 cathode in diode configuration

Potrivitu

Joussot

Mazouffre

2018

Vacuum

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“…The code MULTI-IFE is used to determine the implosion performance driven by a given laser pulse under spherical symmetry approximation. MULTI-IFE is the onedimensional version of the radiation hydrodynamic program MULTI [27][28][29][30][31], which is used widely in the community of inertial fusion [32][33][34] and high-energy-density physics [35].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Laser Pulse for Double-cone Ignition via Machine Learning

Song

Yang

2022

Preprint

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Double-cone ignition (DCI) scheme is a promising fast-ignition approach for the realization of inertial fusion energy. The optimization of laser pulse plays a key role for the fuel compression required by the high gain fusion burning. In this paper, we employ the genetic algorithm in machine learning to optimize the laser pulse in couple with one-dimensional hydrodynamic simulations for the fuel compression. It is found that quantum degeneracy is beneficial for the achievement of high density compression. Analysis from the dataset indicates that the areal density is strongly proportional to the peak density and implosion velocity. Numerical results also suggest that a peak density of 1000 g/cm 3 and an areal density of 3 g/cm 2 could be achieved with a drive energy of 300 kJ in the configuration of double-cone ignition scheme.

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Exploration of microscopic physical processes of Z-pinch by a modified electrostatic direct implicit particle-in-cell algorithm

Li 李,

Ning 宁,

Dong 董

et al. 2024

Chinese Phys. B

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For investigating efficiently the stagnation kinetic-process of Z-pinch, we develop a novel modified electrostatic implicit particle-in-cell (PIC) algorithm in radial one-dimension for Z-pinch simulation in which a small-angle cumulative binary collision algorithm is used. In our algorithm, the electric field in z-direction is solved by a parallel electrode-plate model, the azimuthal magnetic field is obtained by Ampere's law, and the term for charged particle gyromotion is approximated by the cross product of the averaged velocity and magnetic field. In simulation results of 2 MA deuterium plasma shell Z-pinch, the mass center implosion trajectory agree generally with that obtained by one dimensional MHD simulation, and the plasma current also closely aligns with the external current. The phase space diagrams and radial velocity probability distributions of ions and electrons are obtained. The main kinetic characteristic of electron motion is thermal equilibrium and oscillation, which should be oscillated around the ions, while that of ion motion is implosion inwards. In the region of stagnation radius, the radial velocity probability distributions of ions transit from the non-equilibrium to equilibrium state with the current increasing, while electron’s is basically the equilibrium state. When the initial ion density and current peak aren’t high enough, the ions may not reach their thermal equilibrium state through collisions even in its stagnation phase.

show abstract

2-D Numerical Investigation of the Formation of Z-Pinch-Driven Dynamic Hohlraum at 8-MA Current Level

Cited by 3 publications

References 24 publications

Anode position influence on discharge modes of a LaB6 cathode in diode configuration

Anode position influence on discharge modes of a LaB6 cathode in diode configuration

Optimization of Laser Pulse for Double-cone Ignition via Machine Learning

Exploration of microscopic physical processes of Z-pinch by a modified electrostatic direct implicit particle-in-cell algorithm

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