Time-resolved spectroscopy of light emission from plasma generated by a converging strong shock wave in water

Yanuka, D.; Rososhek, A.; Efimov, S.; Nitishinskiy, M.; Krasik, Ya. E.

doi:10.1063/1.4972042

Cited by 14 publications

(7 citation statements)

References 20 publications

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“…In order to match the trajectory of the shock wave to the experimental results, only 80% of the input power was used in the simulations, which is consistent with earlier results. 10,11 This value of 80% of the input power could be related to several reasons. For instance, it can be explained by a part of the current flowing through the surrounding water, by slight overvaluation of the load inductance, since the inductance influencing the resistive voltage includes that of both the wire…”

Section: Comparison Of Results To 2d Hd Simulationmentioning

confidence: 99%

“…8,9 Recently the use of underwater electrical explosions of cylindrical and spherical arrays of wires in water has drawn further interest, as the shock waves from adjacent wires can merge, resulting in highly efficient convergent implosions producing high pressure warm dense matter conditions in the vicinity of the implosion axis or origin. 10,11 Some of the methods used for the diagnostics of underwater electrical wire explosions include optical spectroscopy, optical shadow imaging, and piezo based pressure probes. These can provide useful information on the average temperature in the vicinity of the exploding wire, the velocity of the shock waves generated, and the pressure behind the shock front.…”

Section: Introductionmentioning

confidence: 99%

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Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Yanuka

Rososhek

Theocharous

et al. 2018

Journal of Applied Physics

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We present the first use of synchrotron-based phase contrast radiography to study pulsed-power driven high energy density physics experiments. Underwater electrical wire explosions have become of interest to the wider physics community due to their ability to study material properties at extreme conditions and efficiently couple stored electrical energy into intense shock waves in water. The latter can be shaped to provide convergent implosions, resulting in very high pressures (1-10 Mbar) produced on relatively small pulsed power facilities (100s of kA-MA). Multiple experiments have explored single-wire explosions in water, hoping to understand the underlying physics and better optimize this energy transfer process; however, diagnostics can be limited. Optical imaging diagnostics are usually obscured by the shock wave itself; and until now, diode-based X-ray radiography has been of relatively low resolution and rather a broad x-ray energy spectrum. Utilising phase contrast imaging capabilities of the ID19 beamline at the European Synchrotron Radiation Facility, we were able to image both the exploding wire and the shock wave. Probing radiation of 20-50 keV radiographed 200 μm tungsten and copper wires, in ∼2-cm diameter water cylinders with resolutions of 8 μm and 32 μm. The wires were exploded by a ∼30-kA, 500-ns compact pulser, and 128 radiographs, each with a 100-ps X-ray pulse exposure, spaced at 704 ns apart were taken in each experiment. Abel inversion was used to obtain the density profile of the wires, and the results are compared to two dimensional hydrodynamic and one dimensional magnetohydrodynamic simulations.

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Section: Comparison Of Results To 2d Hd Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Yanuka

Rososhek

Theocharous

et al. 2018

Journal of Applied Physics

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“…Researchers from Israel Institute of Technology verified the metal equation of state (EOS) and conductivity model based on nanosecond and microsecond time-scale UEWE [41][42][43]. Cylindrical and spherical wire arrays were used to generate convergent underwater shock waves (SWs) with pressure as high as 6.6 TPa and water compression ratio ∼9 [44]; a large amount of research on SW converging process and water state at extreme pressure [45][46][47][48][49][50][51][52] has been carried out in Israel Institute of Technology, Imperial College London, Tsinghua University, etc. Taking advantage of the high energy deposition, UEWE is used to synthesize metal nanoparticles with smaller diameter and narrower size distribution than the gas medium EWE [53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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The underwater electrical wire explosion (UEWE) is an appealing source of underwater shock waves (SWs) with a high conversion efficiency from electrical energy to mechanical energy, good repeatability and controllability. Industrial applications are already seen in oil-well unblocking and stratum stimulation, and research is currently underway to apply UEWEs in electro-hydraulic forming, exploitation of unconventional gas and oil resources, etc. The emerging new applications call for a review on UEWE research from the perspective of an efficient SW source. This review paper considers the physical processes and numerical simulation methods, electrical and SW characteristics, and current and potential applications, and provides suggestions for future research directions. The code (XJ_UEWE01) developed by the authors to solve a coupling model of UEWE is included. The paper will provide students and researchers new to this field with an explanation of basic concepts of UEWE and a detailed overview of previous studies, and will aid research on UEWE applications, especially device development and parameter optimization.

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“…The shock wave (SW) generated by underwater electrical wire explosion (UEWE) have increasingly attracted attention due to a growing number of applications, such as increasing the production and enhancing the recovery in oil wells [1], target ignition for the inertial confinement fusion [2], electrohydraulic forming [3], non-thermal food processing [4] and warm dense matter [5].…”

Section: Introductionmentioning

confidence: 99%

Observation of Early Stage of Underwater Electrical Wire Explosion by Shadowgraph

Diao

Liu

et al. 2020

IEEE Access

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Early stage of underwater electrical wire explosion was observed by shadowgraph. By decreasing initial energy, the early stage of wire explosion was slowed down and possible to capture shadow photos during phase transitions. The vaporization process of wire is usually axially non-uniform due to random local micro explosions along the wire. The degree of non-uniform will be significantly decreased when increasing the initial energy. During explosion of the wire, more than one shock waves were generated not only from phase transition, but also from different pulses of deposition power. A modified piston model was introduced to explain the phenomenon.

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Time-resolved spectroscopy of light emission from plasma generated by a converging strong shock wave in water

Cited by 14 publications

References 20 publications

Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Electrical wire explosion as a source of underwater shock waves

Observation of Early Stage of Underwater Electrical Wire Explosion by Shadowgraph

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