Numerical investigation on the implosion dynamics of wire-array Z-pinches in (<i>r</i>, <i>θ</i>) geometry

Huang, Jun; Ding, Ning; Ning, Cheng; Sun, Shunkai; Zhang, Yang; Xiao, Di; Xue, Cun

doi:10.1063/1.4725423

Cited by 12 publications

(5 citation statements)

References 24 publications

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“…We studied the influence of the wire number of outer array on the implosion mode of nested wire array by using a 2D (r, θ) resistive MHD code [82] which has been used to simulate the implosion process of single wire array [19]. Since the current distribution inside the wire array depends not only on the inductance, but also on the diffusion and M A N U S C R I P T…”

Section: Nested Wire Arraysmentioning

confidence: 99%

Theoretical and numerical research of wire array Z-pinch and dynamic hohlraum at IAPCM

Ding

Zhang

Xiao

et al. 2016

Matter and Radiation at Extremes

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Dense Z-pinch plasmas are powerful and energy-efficient laboratory sources of x rays, and show the possibility to drive inertial confinement fusion (ICF). Recent advances in wire-array Z-pinch and Z-pinch dynamic hohlraum (ZPDH) researches at the Institute of Applied Physics and Computational Mathematics are presented in this paper. Models are setup to study different physical processes. A full circuit model (FCM) was used to study the coupling between Z-pinch implosion and generator discharge. A mass injection model with azimuthal modulation was setup to simulate the wire-array plasma initiation, and the two-dimensional MHD code MARED was developed to investigate the Z-pinch implosion, MRT instability, stagnation and radiation. Implosions of nested and quasispherical wire array were also investigated theoretically and numerically. Key processes of ZPDH, such as the array-foam interaction, formation of the hohlraum radiation, as well as the following capsule ablation and implosion, were analyzed with different radiation magneto-hydrodynamics (RMHD) codes. An integrated 2D RMHD simulation of dynamic hohlraum driven capsule implosion provides us the physical insights of wire-array plasma acceleration, shock generation and propagation, hohlraum formation, radiation ablation, and fuel compression.

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Section: Nested Wire Arraysmentioning

confidence: 99%

Theoretical and numerical research of wire array Z-pinch and dynamic hohlraum at IAPCM

Ding

Zhang

Xiao

et al. 2016

Matter and Radiation at Extremes

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“…where η ⊥ is the transverse Spitzer resistivity, ρ vac is the initial low-density background which is considered to be 10 −6 g cm −3 , ρ is the plasma density and k is the resistivity coefficient of the low-density background [32]. The optimal value of k was calculated to be 24 allowing for a smooth transition to the high resistivity background as well as for an accepted timestep value.…”

Section: Set Of Equationsmentioning

confidence: 99%

“…Purely Eulerian grid codes like GORGON [15][16][17][18][19][20][21][22], purely Lagrangian like MULTI-2D [23][24][25] or arbitrary Lagrangian Eulerian (ALE) codes like ALEGRA [26][27][28][29] and MACH2 [30,31], are capable to describe astrophysical and laboratory plasmas. Also, codes like ATHENA and ZEUS or FLASH, were evaluated and tested among others in the Noh Z-Pinch problem and implosion dynamics of wire-array Z-pinches [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

A numerical study on laboratory plasma dynamics validated by low current x-pinch experiments

Koundourakis¹,

Skoulakis²,

Kaselouris³

et al. 2020

Plasma Phys. Control. Fusion

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The computational study of x-pinch plasmas driven by pulsed power generators demands the development of advanced numerical models and simulation schemes, able to enlighten the experiments. The capabilities of PLUTO code are here extended to enable the investigation of low current produced x-pinch plasmas. The numerical modules of the code used and modified are presented and discussed. The simulations results are compared to experiments, carried out on a table-top pulsed power plasma generator implemented in a mode of producing a peak current of ∼45 kA with a rise time (10%–90%) of 50 ns, loaded with Tungsten wires. The structural evolution of plasma density is studied and its influence on the magnetic field is analyzed with the help of the new simulation data. The simulated areal mass density is compared with the experimentally measured dense opaque region to enlighten the dense plasma evolution. In addition, the measured areal electron density is compared to the simulation results. Moreover, the new simulation data offer valuable insights to the main jet formation mechanisms, which are further analyzed and discussed in relation to the influence of the J × B force and the momentum.

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“…Plasma production from pulsed power plasma devices loaded as Z-pinch and X-pinch is essential for plasma physics MULTI-2D [14][15][16] or Arbitrary Lagrangian Eulerian codes like ALEGRA [17][18][19][20] and MACH2 [21,22], are capable of describing astrophysical and laboratory plasmas. Codes like ATHENA, ZEUS 2D, MARED 2D and FLASH are evaluated and tested in the Noh Z-Pinch problem and implosion dynamics of wire-array Z-pinches [23][24][25][26][27]. Especially, the GORGON Eulerian code is ideal for MHD plasma applications such as laser-produced magnetized jets [28][29][30], Z and X-pinch wire configurations [31][32][33][34], Z-pinch wire arrays [35][36][37][38][39], conical arrays, radial wire arrays and foils which create magnetically driven outflows and are studied in laboratory astrophysics experiments mainly for jets of young stellar objects [29,30,[40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

High performance simulations of a single X-pinch

Skoulakis¹,

Koundourakis²,

Ciardi³

et al. 2021

Plasma Phys. Control. Fusion

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The dynamics of plasmas produced by low current X-pinch devices are explored. This comprehensive computational study is the first step in the preparation of an experimental campaign aiming to understand the formation of plasma jets in table-top pulsed power X-pinch devices. Two state-of-the-art Magneto-Hydro-Dynamic codes, GORGON and PLUTO, are used to simulate the evolution of the plasma and describe its key dynamic features. GORGON and PLUTO are built on different approximation schemes and the simulation results obtained are discussed and analyzed in relation to the physics adopted by each code. Both codes manage to accurately handle the numerical demands of the X-pinch plasma evolution and provide precise details on the mechanisms of the plasma expansion, the jet-formation, and the pinch generation. Furthermore, the influence of electrical resistivity, radiation transport and optically thin losses on the dynamic behaviour of the simulated X-pinch produced plasma is studied in PLUTO. Our findings highlight the capabilities of the GORGON and PLUTO codes in simulating the wide range of plasma conditions found in X-pinch experiments, enabling for the direct comparison to the scheduled experiments.

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Numerical investigation on the implosion dynamics of wire-array Z-pinches in (r, θ) geometry

Cited by 12 publications

References 24 publications

Theoretical and numerical research of wire array Z-pinch and dynamic hohlraum at IAPCM

Theoretical and numerical research of wire array Z-pinch and dynamic hohlraum at IAPCM

A numerical study on laboratory plasma dynamics validated by low current x-pinch experiments

High performance simulations of a single X-pinch

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