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Artículos de revistas sobre el tema "Implosion"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Dewald, E. L., S. A. MacLaren, D. A. Martinez, et al. "First graded metal pushered single shell capsule implosions on the National Ignition Facility." Physics of Plasmas 29, no. 5 (2022): 052707. http://dx.doi.org/10.1063/5.0083089.

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Graded metal pushered single shell (PSS) capsules are predicted to be a viable alternative to low-Z capsule indirect drive inertial confinement fusion (ICF) implosions for achieving high fusion yields [MacLaren et al., Phys. Plasmas 28, 122710 (2021)]. The first experiments with Be/Cr-graded metal PSS capsules indicate that the implementation of the principle design feature, the graded density inner metal layer, has succeeded in producing a stable implosion with performance in agreement with predictions. With 50% Cr concentration in the pusher, PSS capsules have greater than ∼2× higher shell d

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2

Choe, W. H., and R. C. Venkatesan. "Self-similar solutions of screw-pinch plasma implosion." Laser and Particle Beams 8, no. 3 (1990): 485–91. http://dx.doi.org/10.1017/s0263034600008727.

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A self-similar analysis of supersonic compression of a “screw-pinch” plasma is carried out that generalizes earlier analyses of pure θ-pinch and Z-pinch implosions. Solutions are found for various implosion modes. It is shown that the screw-pinch plasma implosion differs qualitatively from θ-pinch and Z-pinch implosions.

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3

Lindl, John D., Steven W. Haan, and Otto L. Landen. "Impact of hohlraum cooling on ignition metrics for inertial fusion implosions." Physics of Plasmas 30, no. 1 (2023): 012705. http://dx.doi.org/10.1063/5.0113138.

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This paper extends the evaluation of ignition metrics to include the impact of hohlraum cooling before peak implosion velocity in radiation driven implosions. First, we provide an extension of the results for the key hot spot stagnation quantities from the 2018 paper [Lindl et al., Phys Plasmas 25, 122704 (2018)]. The modified analytic expressions presented here match the Hydra results for these National Ignition Facility scale implosions both with and without hohlraum cooling before peak velocity if the effective ablation pressure Pabl(effective) = Pabl(tpv − 0.5 ns) is used in the analytic f

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4

Manheimer, W., and D. Colombant. "Effects of viscosity in modeling laser fusion implosions." Laser and Particle Beams 25, no. 4 (2007): 541–47. http://dx.doi.org/10.1017/s0263034607000663.

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AbstractThis paper examines the necessity of including ion viscosity in modeling laser fusion implosions. Using the Naval Research Laboratory one-half Mega Joule laser fusion target as an example, it is shown that for virtually the entire implosion up to maximum compression, and the entire rebound after the implosion, ion viscosity is unimportant. However for about half a nanosecond before peak implosion, ion viscosity can have a significant, but by no means dominant effect on both the one-dimensional flow and on the Rayleigh-Taylor instability.

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5

Baker, K. L., O. Jones, C. Weber, et al. "Hydroscaling indirect-drive implosions on the National Ignition Facility." Physics of Plasmas 29, no. 6 (2022): 062705. http://dx.doi.org/10.1063/5.0080732.

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A goal of the laser-based National Ignition Facility (NIF) is to increase the liberated fusion energy “yield” in inertial confinement fusion experiments well past the ignition threshold and the input laser energy. One method of increasing the yield, hydrodynamic scaling of current experiments, does not rely on improving compression or implosion velocity, but rather increases the scale of the implosion to increase hotspot areal density and confinement time. Indirect-drive ( Hohlraum driven) implosions carried out at two target sizes, 12.5% apart, have validated hydroscaling expectations. Moreov

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6

Li, Chuanying, Jianfa Gu, Fengjun Ge, Zhensheng Dai, and Shiyang Zou. "Impact of different electron thermal conductivity models on the performance of cryogenic implosions." Physics of Plasmas 29, no. 4 (2022): 042702. http://dx.doi.org/10.1063/5.0066708.

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The electron thermal conduction strongly affects the hot-spot formation and the hydrodynamic instability growth in inertial confinement fusion implosions. A harmonic-mean flux-limited conductivity model has been widely used in implosion simulations. In this paper, using the high foot implosion N140520 as an example, we have performed a series of one-dimensional (1D) no-alpha simulations to quantify the impact of different conductivity models including the Spitzer–Harm model, the Lee–More model, and the recently proposed coupled Gericke-Murillo-Schlanges model [Ma et al., Phys. Rev. Lett. 122,

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7

Roycroft, R., J. P. Sauppe, and P. A. Bradley. "Double cylinder target design for study of hydrodynamic instabilities in multi-shell ICF." Physics of Plasmas 29, no. 3 (2022): 032704. http://dx.doi.org/10.1063/5.0083190.

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Cylindrical implosions are used to study hydrodynamic instability growth for inertial confinement fusion (ICF) applications, as the cylindrical geometry allows for easier diagnostic access while retaining convergence effects. In this work, we use the established cylindrical implosion platform [Palaniyappan et al., Phys. Plasmas 27, 042708 (2020)] to inform the double shell ICF campaign [Montgomery et al., Phys. Plasmas 25, 092706 (2018)]. We present a design for a double cylindrical target as an analogue to the double shell ICF capsule in order to study hydrodynamic instability growth on the h

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8

Barlow, D., T. Goffrey, K. Bennett, et al. "Role of hot electrons in shock ignition constrained by experiment at the National Ignition Facility." Physics of Plasmas 29, no. 8 (2022): 082704. http://dx.doi.org/10.1063/5.0097080.

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Shock ignition is a scheme for direct drive inertial confinement fusion that offers the potential for high gain with the current generation of laser facility; however, the benefits are thought to be dependent on the use of low adiabat implosions without laser–plasma instabilities reducing drive and generating hot electrons. A National Ignition Facility direct drive solid target experiment was used to calibrate a 3D Monte Carlo hot-electron model for 2D radiation-hydrodynamic simulations of a shock ignition implosion. The [Formula: see text] adiabat implosion was calculated to suffer a 35% peak

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9

Nishimura, H., H. Shiraga, T. Endo, et al. "Radiation-driven cannonball targets for high-convergence implosions." Laser and Particle Beams 11, no. 1 (1993): 89–96. http://dx.doi.org/10.1017/s0263034600006947.

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In the last few years, systematic studies on radiation hydrodynamics in the X-ray confining cavity and a fuel capsule have attained remarkable progress. This makes it possible to analyze quantitatively the energy transfer processes from laser to the fusion capsule and find uniform irradiation conditions of the fusion capsule driven by thermal X rays. As a result, reproducible and stable implosions were achieved. Throughout implosion experiments with the Gekko XII blue laser system (351 nm, kJ, 0.8 ns), good agreement of implosion has been obtained between the experiment and numerical simulatio

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10

Christopherson, A. R., R. Betti, C. J. Forrest, et al. "Inferences of hot electron preheat and its spatial distribution in OMEGA direct drive implosions." Physics of Plasmas 29, no. 12 (2022): 122703. http://dx.doi.org/10.1063/5.0091220.

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Hot electrons generated from laser plasma instabilities degrade performance of direct drive implosions by preheating the deuterium and tritium (DT) fuel resulting in early decompression and lower areal densities at stagnation. A technique to quantify the hot electron preheat of the dense DT fuel and connect it to the degradation in areal density is described in detail. Hot electrons are measured primarily from the hard x-rays they emit as they slow down in the target. The DT preheat is inferred from a comparison of the hard x-ray signals between a DT-layered implosion and its mass equivalent a

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11

Ikeda, C. M., J. Wilkerling, and J. H. Duncan. "The implosion of cylindrical shell structures in a high-pressure water environment." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 469, no. 2160 (2013): 20130443. http://dx.doi.org/10.1098/rspa.2013.0443.

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The implosion of cylindrical shell structures in a high-pressure water environment is studied experimentally. The shell structures are made from thin-walled aluminium and brass tubes with circular cross sections and internal clearance-fit aluminium end caps. The structures are filled with air at atmospheric pressure. The implosions are created in a high-pressure tank with a nominal internal diameter of 1.77 m by raising the ambient water pressure slowly to a value, P c , just above the elastic stability limit of each shell structure. The implosion events are photographed with a high-speed digi

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12

Haines, Brian M., J. P. Sauppe, B. J. Albright, et al. "A mechanism for reduced compression in indirectly driven layered capsule implosions." Physics of Plasmas 29, no. 4 (2022): 042704. http://dx.doi.org/10.1063/5.0083299.

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High-yield implosions on the National Ignition Facility rely on maintaining low entropy in the deuterium–tritium fuel, quantified by its adiabat, in order to efficiently couple energy to the hot spot through high compression of the fuel layer. We present very-high-resolution xRAGE simulation results that study the impacts of interfacial mixing and the jetting of materials due to surface defects, defects on internal interfaces, voids, and engineering features on fuel layer compression. Defects and voids are typically neglected in implosion simulations due to their small size and three-dimension

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13

Sugitani, Koji, Yasuo Fukui, and Katsuo Ogura. "Bright-rimmed clouds with IRAS point sources: candidates for star formation by radiation-driven implosion." Symposium - International Astronomical Union 147 (1991): 498–99. http://dx.doi.org/10.1017/s0074180900240163.

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We present preliminary results of a survey of bright-rimmed clouds associated with IRAS point sources.Bright-rimmed globules associated with old HII regions have long been suspected as a potential site for star formation. Physical conditions of such clouds seem to well match to models of radiation-driven implosion, which have been studied as an effective process for induced star formation (e.g. Klein et al. 1985, Bertoldi 1989). Bright-rimmed globules associated with IRAS point sources are good candidates for the sites of induced star formation. Three well-established cases of radiation-driven

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14

Sugitani, Koji, Yasuo Fukui, and Katsuo Ogura. "Bright-rimmed clouds with IRAS point sources: candidates for star formation by radiation-driven implosion." Symposium - International Astronomical Union 147 (1991): 498–99. http://dx.doi.org/10.1017/s0074180900199541.

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We present preliminary results of a survey of bright-rimmed clouds associated with IRAS point sources.Bright-rimmed globules associated with old HII regions have long been suspected as a potential site for star formation. Physical conditions of such clouds seem to well match to models of radiation-driven implosion, which have been studied as an effective process for induced star formation (e.g. Klein et al. 1985, Bertoldi 1989). Bright-rimmed globules associated with IRAS point sources are good candidates for the sites of induced star formation. Three well-established cases of radiation-driven

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15

Baltazar, J., R. Betti, K. Churnetski та ін. "Diagnosing low-mode (ℓ < 6) and mid-mode (6 ≤ ℓ ≤ 60) asymmetries in the post-stagnation phase of laser-direct-drive deuterium–tritium cryogenic implosions on OMEGA". Review of Scientific Instruments 93, № 12 (2022): 123513. http://dx.doi.org/10.1063/5.0101653.

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Low- and mid-mode perturbations are possible candidates for performance limitations in cryogenic direct-drive implosions on the OMEGA laser at the Laboratory of Laser Energetics. Simulations with a 3D hydrocode demonstrated that hotspot imagers do not show evidence of the shell breakup in the dense fuel. However, these same simulations revealed that the low- and mid-mode perturbations in the dense fuel could be diagnosed more easily in the post-stagnation phase of the implosion by analyzing the peak in the x-ray emission limb at the coronal–fuel interface than before or at the stagnation phase

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16

André, M., D. Babonneau, C. Bayer, et al. "Progress in inertial confinement fusion physics at Centre d'Etudes de Limeil-Valenton." Laser and Particle Beams 12, no. 3 (1994): 329–42. http://dx.doi.org/10.1017/s0263034600008181.

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The laser program developed at the Centre d'Etudes de Limeil-Valenton, Saint-Georges, France (CEL-V) is concentrated on a systematic investigation of indirect drive fusion; by comparison with direct drive, this process is expected to provide the required irradiation uniformity with relaxed constraints on laser beam quality. The main concerns are radiative transfer and preheat, hydrodynamic instabilities, and high-density X-ray driven implosions. Ablative implosion experiments have been conducted with the two beams at the Phebus facility (5 kJ, 1.3 ns, 0.35 μm). Symmetry was proved to be contro

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17

Sio, H., O. Larroche, A. Bose, et al. "Fuel–shell mix and yield degradation in kinetic shock-driven inertial confinement fusion implosions." Physics of Plasmas 29, no. 7 (2022): 072710. http://dx.doi.org/10.1063/5.0087905.

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Fuel–shell mix in kinetic plasma conditions is probed using nuclear and x-ray self-emission in shock-driven, D3He-gas-filled inertial confinement fusion implosions. As initial gas fill density decreases, measured nuclear yields and ion temperatures are lower than expected as compared to radiation-hydrodynamic simulations. Spatially and temporally resolved x-ray emissions indicate significant mixing at the fuel–shell interface in implosions with low initial gas fill density. This observed fuel–shell mix introduces a substantial amount of shell ions into the center of the implosion prior to and

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18

HEYA, MANABU, HIROYUKI SHIRAGA, ATSUSHI SUNAHARA, et al. "Implosion experiments of gas-filled plastic-shell targets with [ell ] = 1 drive nonuniformity at the Gekko-XII glass laser." Laser and Particle Beams 19, no. 2 (2001): 267–84. http://dx.doi.org/10.1017/s0263034601192177.

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Effects of an implosion nonuniformity with [ell ] = 1 ([ell ]: Legendre polynomial mode number) on the hot spark formation were investigated in a series of direct-drive implosion experiments at the Gekko-Xll glass laser (Yamanaka et al., 1987). The implosion dynamics and the performance from the early to final stage of the implosion were observed with a variety of X-ray imaging and neutron diagnostics. A drive nonuniformity in the implosion with [ell ] = 1 was observed in the shape of the accelerated target at the early stage of the implosion. At the final stage of the implosion, the resultant

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19

Köpcke, Maris. "Positivism’s Implosion." American Journal of Jurisprudence 66, no. 2 (2021): 355–71. http://dx.doi.org/10.1093/ajj/auab017.

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Abstract: Kletzer’s recent book The Idea of a Pure Theory illustrates the incoherence of a legal theory’s methodological commitment to “purity,” and hence to independence from moral and empirical concerns. Unlike other self-styled “positivist” accounts that pay mere lip service to this methodological agenda, Kletzer helpfully spells it out and follows it through, to the point of expunging from his account anything bearing the resemblance of an argument from first principles. He associates moral with theological reasoning, and theological reasoning in turn with legal reasoning by appeal to vali

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20

Peters, Han, and Liz Vivas. "Parabolic Implosion." Notices of the American Mathematical Society 67, no. 08 (2020): 1. http://dx.doi.org/10.1090/noti2132.

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21

Zavattaro, Staci M. "Organizational Implosion." Administration & Society 46, no. 9 (2014): 1071–91. http://dx.doi.org/10.1177/0095399714554681.

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Detroit, Michigan, is on the brink: Financial mismanagement, population exodus, increasing legacy costs, and out-of-control debt have driven it to bankruptcy. City actors, both administrative and elected, making politically driven decisions invited the disaster. This article uses the concepts of organizational implosion and image management to examine the degree to which the city indeed suffered organization implosion and how the city presented its image, internally and externally. The article synthesizes the administrative and communication literature streams to find that despite an overall r

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22

Yen, Nai‐chyuan. "Implosion sound." Journal of the Acoustical Society of America 98, no. 5 (1995): 2876. http://dx.doi.org/10.1121/1.413179.

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23

Guillemin, Victor, Lisa Jeffrey Jeffrey, and Reyer Sjamaar Sjamaar. "Symplectic Implosion." Transformation Groups 7, no. 2 (2002): 155–85. http://dx.doi.org/10.1007/s00031-002-0009-y.

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24

Kerr, David. "Information Implosion." Journal of the Royal College of Physicians of London 29, no. 4 (1995): 265. https://doi.org/10.1016/s0035-8819(25)00560-4.

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25

Walsh, C. A., R. Florido, M. Bailly-Grandvaux, et al. "Exploring extreme magnetization phenomena in directly driven imploding cylindrical targets." Plasma Physics and Controlled Fusion 64, no. 2 (2022): 025007. http://dx.doi.org/10.1088/1361-6587/ac3f25.

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Abstract This paper uses extended-magnetohydrodynamics (MHD) simulations to explore an extreme magnetized plasma regime realizable by cylindrical implosions on the OMEGA laser facility. This regime is characterized by highly compressed magnetic fields (greater than 10 kT across the fuel), which contain a significant proportion of the implosion energy and induce large electrical currents in the plasma. Parameters governing the different magnetization processes such as Ohmic dissipation and suppression of instabilities by magnetic tension are presented, allowing for optimization of experiments t

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26

Lees, A., R. Betti, J. P. Knauer, et al. "Understanding the fusion yield dependencies in OMEGA DT-layered implosion experiments using a physics-based statistical mapping model." Physics of Plasmas 30, no. 1 (2023): 012709. http://dx.doi.org/10.1063/5.0106515.

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Improving the performance of inertial confinement fusion implosions requires physics models that can accurately predict the response to changes in the experimental inputs. Good predictive capability has been demonstrated for the fusion yield using a statistical mapping of simulated outcomes to experimental data [Gopalaswamy et al., Nature 565(771), 581–586 (2019)]. In this paper, a physics-based statistical mapping approach is used to extract and quantify all the major sources of degradation of fusion yield for direct-drive implosions on the OMEGA laser. The yield is found to be dependent on t

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27

Kissiedu, Evelyn Esenam, Israel Kofi Nyarko, and Michael Ahiaga Mawuta. "Examining the Triggers, Signals, and Implications of Corporate Implosion: Lessons and Intervention Strategies for Private Universities in Africa." Journal of Education, Society and Behavioural Science 37, no. 5 (2024): 31–48. http://dx.doi.org/10.9734/jesbs/2024/v37i51321.

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Corporate implosion, characterized by sudden organizational collapses and significant financial repercussions, necessitates a comprehensive understanding of its triggers, signals, and potential intervention strategies. This paper employs a literature review and synthesis approach to delve into existing corporate implosion research specifically focusing on defining triggers, early signals, and viable rescue mechanisms. The study investigates triggers contributing to corporate implosions, focusing on financial mismanagement and leadership failures. It underscores the intricate interplay between

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28

Yanagawa, T., H. Sakagami, A. Sunahara, and H. Nagatomo. "Asymmetric implosion of a cone-guided target irradiated by Gekko XII laser." Laser and Particle Beams 33, no. 3 (2015): 367–78. http://dx.doi.org/10.1017/s0263034615000427.

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AbstractIn implosion experiments of a cone-guided target using Gekko XII laser, the lasers on the cone side are not irradiated to avoid the irradiation of the cone. In such condition, the implosion process is done highly asymmetrically. Thus we evaluated the effects of the asymmetric implosion on the compression ratio of the fuel in Gekko XII irradiation orientation by three-dimensional hydro simulations. In this paper, we discuss the degradation of the compression ratio by asymmetric implosion and show that the compression ratio can be enhanced by adjusting the laser intensity between each be

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29

KYRALA, GEORGE A., NORMAN DELAMATER, DOUGLAS WILSON, et al. "Direct drive double shell target implosion hydrodynamics on OMEGA." Laser and Particle Beams 23, no. 2 (2005): 187–92. http://dx.doi.org/10.1017/s0263034605050330.

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Imploding indirect-drive double shell targets may provide an alternative, non-cryogenic path to ignition at the National Ignition Facility (NIF). Experiments are being pursued at OMEGA to understand the hydrodynamics of these implosions and the possibility of scaling it to the NIF design. We have used 40 beams from the OMEGA laser to directly drive the capsules, and we have used the remaining 20 beams to backlight the imploding shells from two different directions at multiple times. We will review the recent experiments to measure the hydrodynamics of the targets using two-view X-ray radiograp

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30

Joshi, T. R., R. C. Shah, W. Theobald, et al. "Diagnosis of the imploding shell asymmetry in polar-direct-drive deuterium–tritium cryogenic target implosions on OMEGA." Review of Scientific Instruments 93, no. 9 (2022): 093524. http://dx.doi.org/10.1063/5.0101567.

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We discuss the analyses of gated, x-ray imaging data from polar-direct-drive experiments with cryogenically layered deuterium–tritium targets on the OMEGA laser. The in-flight shell asymmetries were diagnosed at various times during the implosion, which was caused by the beam pointing geometry and preimposed variations in the energy partition between the different groups of laser beams. The shape of the ablation surface during the acceleration phase of the implosion was measured along two different lines of sight, and a Legendre mode ( ℓ-mode) decomposition was applied for modes of up to ten t

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31

Kunimune, J. H., H. G. Rinderknecht, P. J. Adrian, et al. "Knock-on deuteron imaging for diagnosing the morphology of an ICF implosion at OMEGA." Physics of Plasmas 29, no. 7 (2022): 072711. http://dx.doi.org/10.1063/5.0096786.

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Knock-on deuteron imaging is a new diagnostic technique that is being implemented at the OMEGA laser facility to diagnose the morphology of an inertial confinement fusion (ICF) implosion. It utilizes the fact that some of the neutrons from deuterium–tritium (DT)-fusion reactions generated in the central hot-spot of an ICF implosion elastically scatter deuterons as they traverse the surrounding shell layer. The energy of these “knock-on” deuterons depends on the scattering angle, where the most energetic deuterons are forward-scattered and probe the shape of the central hot-spot, while lower-en

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32

Rinderknecht, H. G., P. V. Heuer, J. Kunimune, et al. "A knock-on deuteron imager for measurements of fuel and hotspot asymmetry in direct-drive inertial confinement fusion implosions (invited)." Review of Scientific Instruments 93, no. 9 (2022): 093507. http://dx.doi.org/10.1063/5.0099301.

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A knock-on deuteron imager (KoDI) has been implemented to measure the fuel and hotspot asymmetry of cryogenic inertial confinement fusion implosions on OMEGA. Energetic neutrons produced by D–T fusion elastically scatter (“knock on”) deuterons from the fuel layer with a probability that depends on ρR. Deuterons above 10 MeV are produced by near-forward scattering, and imaging them is equivalent to time-integrated neutron imaging of the hotspot. Deuterons below 6 MeV are produced by a combination of side scattering and ranging in the fuel, and encode information about the spatial distribution o

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33

SOMEYA, TETSUO, KENTAROU MIYAZAWA, TAKASHI KIKUCHI, and SHIGEO KAWATA. "Direct-indirect mixture implosion in heavy ion fusion." Laser and Particle Beams 24, no. 3 (2006): 359–69. http://dx.doi.org/10.1017/s0263034606060526.

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In order to realize an effective implosion, the beam illumination non-uniformity and implosion non-uniformity must be suppressed to less than a few percent. In this paper, a direct-indirect mixture implosion mode is proposed and discussed in heavy ion beam (HIB) inertial confinement fusion (HIF) in order to release sufficient fusion energy in a robust manner. On the other hand, the HIB illumination non-uniformity depends strongly on a target displacement (dz) in a reactor. In a direct-driven implosion mode dz of ∼20 μm was tolerance and in an indirect-implosion mode dz of ∼100 μm was allowable

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34

Singh, Shailendra, and Ritam Mallick. "Time-like detonation in presence of magnetic field." Laser and Particle Beams 37, no. 01 (2019): 30–37. http://dx.doi.org/10.1017/s0263034619000041.

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AbstractWe study the effect of magnetic field in an implosion process achieved by radiation. A time-varying sinusoidal magnetic field is seen to affect the continuous transition of space-like detonation to time-like detonation at the core of implosion region. The oscillating varying magnetic field has a significant effect in increasing the volume of the time-like detonation of the core of implosion and also modifies the time of the implosion process. This transition can have significant outcome both theoretically and experimentally in the areas of high-energy hadronization of quark–gluon plasm

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35

Paddock, R. W., H. Martin, R. T. Ruskov, et al. "One-dimensional hydrodynamic simulations of low convergence ratio direct-drive inertial confinement fusion implosions." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2189 (2020): 20200224. http://dx.doi.org/10.1098/rsta.2020.0224.

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Indirect drive inertial confinement fusion experiments with convergence ratios below 17 have been previously shown to be less susceptible to Rayleigh–Taylor hydrodynamic instabilities, making this regime highly interesting for fusion science. Additional limitations imposed on the implosion velocity, in-flight aspect ratio and applied laser power aim to further reduce instability growth, resulting in a new regime where performance can be well represented by one-dimensional (1D) hydrodynamic simulations. A simulation campaign was performed using the 1D radiation-hydrodynamics code HYADES to inve

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36

ROSCH, R., D. FRIART, M. DARRIGOL, et al. "The implosion dynamics and emission characteristics of Al liner-on-wire implosions." Laser and Particle Beams 18, no. 2 (2000): 307–13. http://dx.doi.org/10.1017/s0263034600182217.

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Previous experiments at 0.1 TW level have shown that stability and X-ray emission of fast Z-pinch could be significantly improved by imploding an Al vapor jet onto a very thin coaxial wire (Wessel et al., 1992). Here we present the first results of an Al Z-pinch using a similar liner but at mega-ampere level. The pinch is driven by AMBIORIX facility, a 2 TW, 0.5 Ω, 2 MA, and a 50-ns pulse-line generator. We study the effect of an Al wire and its diameter (20–50 μm) on the implosion dynamics, on X-ray yield, on-axis magnetohydrodynamics (MHD) stability, and on Rayleigh–Taylor instability of the

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37

Phillips, J. C. "American physics implosion." Physics Today 60, no. 10 (2007): 16. http://dx.doi.org/10.1063/1.2800083.

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38

Roncayolo, Marcel. "Dilution et implosion." Espaces Temps 33, no. 1 (1986): 13–14. http://dx.doi.org/10.3406/espat.1986.3311.

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39

Loizeaux, J. Mark, and Douglas K. Loizeaux. "Demolition by Implosion." Scientific American 273, no. 4 (1995): 146–53. http://dx.doi.org/10.1038/scientificamerican1095-146.

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40

Qadeer, Mohammad A. "Urbanization by implosion." Habitat International 28, no. 1 (2004): 1–12. http://dx.doi.org/10.1016/s0197-3975(02)00069-3.

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41

Yamanaka, C. "Laser driven implosion." Laser and Particle Beams 8, no. 1-2 (1990): 3–17. http://dx.doi.org/10.1017/s0263034600007783.

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Inertial confinement fusion (ICF) has made great progress. In fact several significant scientific firsts have been achieved in the last year. These developments have presented the ICF community with an opportunity to embark on a new phase in ICF research. The key issues of laser fusion are to attain a high absorption of laser light in a plasma, to prevent preheating of fuel during the compression, and to achieve highly efficient implosion by uniform compression of fuel due to the homogeneous deposition of laser energy on the pellet surface. Direct drive and indirect drive have been investigate

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42

Eberstadt, Nicholas. "The Population Implosion." Foreign Policy, no. 123 (March 2001): 42. http://dx.doi.org/10.2307/3183154.

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43

Winthrop-Young, Geoffrey. "Implosion and Intoxication." Theory, Culture & Society 23, no. 7-8 (2006): 75–91. http://dx.doi.org/10.1177/0263276406069884.

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Focusing on Kittler’s reading of Goethe’s ‘Wanderer’s Nightsong’ and Pink Floyd’s ‘Brain Damage’, the article traces Kittler’s development from discourse analysis to media theory. Where more traditional approaches would stress notions of self-reflexivity (both the poem and the song elaborate on their effects and foreground their own construction), Kittler performs, in his own words, a kind of ‘implosion’: The words of Goethe’s poem collapse back into the discursive order they evoke, and Pink Floyd’s song performs its own technology. But it is precisely this implosion that has an intoxicating e

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44

Weidenfeld, Ursula. "Implosion einer Krisenkanzlerin?" Indes 10, no. 1-2 (2022): 127–35. http://dx.doi.org/10.13109/inde.2022.10.1-2.127.

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45

Ananya, A. B., and Joseph Jikhil. "Controlled Building Implosion." Journal of Structural Engineering, its Applications and Analysis 7, no. 2 (2024): 37–47. https://doi.org/10.5281/zenodo.10930726.

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<em>Urban development is a key concern which requires advancements that are malleable enough to accommodate post-construction changes. Infrastructure upgrades, redevelopment, or removal of structurally unsound or obsolete structures have made demolitions commonplace. The popularity of RCC buildings has furthered the cause. Amongst the other methods, the implosion of buildings has attained wider acceptance as a viable option. This report covers the plausibility and institutional aspects of demolition and further explores the use of implosion as a method of demolition in the present times. This

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46

Xia, Tian Xiang, Tong Zhao, Liang Zou, Li Zhang, and Feng Zhu. "Research on Two-Dimensional MHD Simulations of X-Pinch Implosion and its Physical Aspects." Applied Mechanics and Materials 525 (February 2014): 316–19. http://dx.doi.org/10.4028/www.scientific.net/amm.525.316.

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Based on a large quantity of experimental work and study of the two-dimensional MHD (Magnetohydrodynamic) simulation describing the implosion dynamics of X-pinch, at the same time taking basic physical processes of implosion into account, this paper seeks to build a two-dimensional MHD simulation model on implosion dynamics throughout the whole constriction evolution (including formation of dense plasma, compression, generation of hot spot, X-ray pulsed radiation), determine the target area for numerical simulation, as well as the initial time for simulation and plasma initial state. As for tw

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47

Iinuma, T., T. Karino, S. Kondo, et al. "Control of fuel target implosion non-uniformity in heavy ion inertial fusion." Laser and Particle Beams 34, no. 4 (2016): 729–34. http://dx.doi.org/10.1017/s0263034616000677.

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AbstractIn inertial fusion, one of scientific issues is to reduce an implosion non-uniformity of a spherical fuel target. The implosion non-uniformity is caused by several factors, including the driver beam illumination non-uniformity, the Rayleigh–Taylor instability (RTI) growth, etc. In this paper, we propose a new control method to reduce the implosion non-uniformity; the oscillating implosion acceleration δg(t) is created by pulsating and dephasing heavy-ion beams (HIBs) in heavy-ion inertial fusion (HIF). The δg(t) would reduce the RTI growth effectively. The original concept of the non-u

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48

Sreedhar, V. V., and Amitabh Virmani. "Maximal Kinematical Invariance Group of Fluid Dynamics and Applications." Universe 8, no. 6 (2022): 319. http://dx.doi.org/10.3390/universe8060319.

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The maximal kinematical invariance group of the Euler equations of fluid dynamics for the standard polytropic exponent is larger than the Galilei group. Specifically, the inversion transformation (Σ:t→−1/t,x→→x→/t) leaves the Euler equation’s invariant. This duality has been used to explain the striking similarities observed in simulations of the supernova explosions and laboratory implosions induced in plasma by intense lasers. The inversion symmetry extends to discontinuous fluid flows as well. In this contribution, we provide a concise review of these ideas and discuss some applications. We

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49

Kawata, S., K. Noguchi, T. Suzuki, et al. "Uniformity of fuel target implosion in heavy ion fusion." Laser and Particle Beams 33, no. 4 (2015): 591–99. http://dx.doi.org/10.1017/s026303461500066x.

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AbstractIn inertial confinement fusion the target implosion non-uniformity is introduced by a driver beams’ illumination non-uniformity, a fuel target alignment error in a fusion reactor, the target fabrication defect, etc. For a steady operation of a fusion power plant the target implosion should be robust against the implosion non-uniformities. In this paper the requirement for the implosion uniformity is first discussed. The implosion uniformity should be less than a few percent. A study on the fuel hotspot dynamics is also presented and shows that the stagnating plasma fluid provides a sig

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50

Huneault, Justin, David Plant, and Andrew J. Higgins. "Rotational stabilisation of the Rayleigh–Taylor instability at the inner surface of an imploding liquid shell." Journal of Fluid Mechanics 873 (June 25, 2019): 531–67. http://dx.doi.org/10.1017/jfm.2019.346.

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A number of applications utilise the energy focussing potential of imploding shells to dynamically compress matter or magnetic fields, including magnetised target fusion schemes in which a plasma is compressed by the collapse of a liquid metal surface. This paper examines the effect of fluid rotation on the Rayleigh–Taylor (RT) driven growth of perturbations at the inner surface of an imploding cylindrical liquid shell which compresses a gas-filled cavity. The shell was formed by rotating water such that it was in solid body rotation prior to the piston-driven implosion, which was propelled by

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