Physics of Hypercumulative Plasma Jet Formation by Ablatively-Driven Implosion of Hollow Cones

Minin, V. F.

doi:10.11648/j.ajmp.20130206.15

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AJMP

2013

DOI: 10.11648/j.ajmp.20130206.15

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Physics of Hypercumulative Plasma Jet Formation by Ablatively-Driven Implosion of Hollow Cones

V. F. Minin¹

Abstract: In this letter we suggest a new approach to the physical principles for hypercumulative plasma jet formation. This new approach leads to several new results which are of fundamental importance. The simulation results of hypercumulative plasma jet are discussed. It has been shown that the increase of the plasma jet speed in the suggested configuration is 25-30% and the increase of jet pulse is more than 90 times which are not achievable in the classical cumulation.

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Elongated long-lived jet of dense plasma produced by a hollow laser beam

2021

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Numerical simulation of the dynamics of plasma jets planned for use for the initiation of vacuum pinch discharges has been carried out. Jets of the “laser-metal-plasma-liner” type are created by laser beams with different spatial intensity distributions, which irradiate targets of various configurations. The three variants of plasma-jets formation are considered: irradiation of a target by (i) a Gaussian beam from a neodymium laser, (ii) the same Gaussian beam incident on a hole in the target, and (iii) a beam with the intensity distribution of the Laguerre–Gaussian mode. The dynamics of spatial distributions of the electron density, jet plasma temperatures, and the target mass ablated by laser radiation is calculated. It is shown that for quite moderate laser beam energies and intensities ∼400 mJ and ∼109 W/cm2, respectively, in the second and third cases, jets are produced with the lifetime of a few tens of nanoseconds and the maximum density ∼1019 and 1021 cm−3, respectively. The use of such jets can increase the pinching efficiency and improve plasma parameters in laser-induced discharges.

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Elongated long-lived jet of dense plasma produced by a hollow laser beam

2021

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Study on jet forming characteristics of shaped charge with truncated-liner structure

et al. 2020

J. Phys.: Conf. Ser.

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In order to verify the jet forming characteristics of the shaped charge with a truncated-liner, numerical simulation and X-ray experimental research were carried out. The behavior of the truncated-liner and the top velocity, diameter and morphology of the jet were obtained, and the outcomes were compared with the characteristics of the jet formed by the traditional shaped charge. The results show that the numerical simulations are almost consistent with the results obtained by the X-ray test. The morphology of the two is nearly the same, and the data deviation is less than 6%. The truncated-liner can effectively improve the velocity of the jet head, which can reach more than 10km/s by structural optimization. In addition, the truncated-liner can decrease the diameter of the slug, meanwhile, increase the length of the jet and the quality utilization of the liner.

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Physics of Hypercumulative Plasma Jet Formation by Ablatively-Driven Implosion of Hollow Cones

Cited by 2 publications

References 4 publications

Elongated long-lived jet of dense plasma produced by a hollow laser beam

Elongated long-lived jet of dense plasma produced by a hollow laser beam

Study on jet forming characteristics of shaped charge with truncated-liner structure

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