A5102972042- Laser-Plasma Interactions and Diagnostics
- Ion-surface interactions and analysis
- Combustion and Detonation Processes
- Laser-Matter Interactions and Applications
- Energetic Materials and Combustion
- Forensic Fingerprint Detection Methods
- Laser-induced spectroscopy and plasma
- Traumatic Ocular and Foreign Body Injuries
- Nuclear Physics and Applications
- Geophysics and Sensor Technology
- High-Velocity Impact and Material Behavior
- Gyrotron and Vacuum Electronics Research
- Plasma Diagnostics and Applications
- Earthquake Detection and Analysis
- Electromagnetic Launch and Propulsion Technology
- Pulsed Power Technology Applications
- Induction Heating and Inverter Technology
- Advanced X-ray Imaging Techniques
- Electric Power Systems and Control
- Power Transformer Diagnostics and Insulation
- Engineering Diagnostics and Reliability
- Metallurgy and Material Forming
- Legal Studies and Reforms
- Sensor Technology and Measurement Systems
- Particle Accelerators and Free-Electron Lasers
Technion – Israel Institute of Technology
2012-2024
Financial Research (Hungary)
2024
Institute of High Current Electronics
2008
Tel Aviv University
2001
Results and analysis of a microsecond time scale underwater electrical wire explosion are presented. Experiments were carried out with Cu exploded by current pulse ⩽100kA duration. The is based on shadow spectrally resolved streak photography which used to monitor the evolution discharge channel shock wave. obtained data for hydrodynamic calculation generated water flow parameters, such as pressure velocity distribution between In particular, at boundary energy transferred estimated. results...
Results of spectroscopic research in the visible range light radiation generated by underwater electrical wire explosions (UEWE) are presented. A pulsed generator with an output voltage ∼110kV, current ∼70kA, and rise time ∼60ns was used for explosion Cu wires 0.1mm diameter 50mm length. It shown that UEWE is not governed “polarity” effect, which plays important role vacuum. The results detailed space- time-resolved measurements show spectrum differs significantly expected from exploding...
Analysis of time- and space-resolved spectrum radiation emitted from the discharge channel generated by an underwater electrical wire explosion is reported. The purpose this investigation was to detect a possible shunting corona discharge. During careful analysis no evidence for such found. Discharge temperature 7eV estimated quantitative spectra.
The results of a study shock wave (SW) generation by means underwater electrical wire explosion with different exploding configurations and two high-current microsecond submicrosecond timescale generators are presented. By using aperiodical generator discharge, ~85% ~15% the stored energy was transferred to generated water flow, respectively. flow is distributed between its internal (~25%) kinetic (~75%) energies. It shown that zigzag configuration, confinement SW propagation region, an...
The results of the first experiments on underwater electrical explosion a spherical wire array generating converging strong shock wave are reported. Using moderate pulse power generator with stored energy ≤6 kJ and discharge current ≤500 kA rise-time ∼300 ns, explosions Cu Al arrays different diameters number diameter wires were tested. Electrical, optical, destruction diagnostics used to determine deposited into array, time-of-flight origin implosion, parameters water at that location....
Investigation of underwater electrical wire explosions occurring in the time scale few microseconds requires a measurement pressure waves with nanosecond rise and microsecond fall time. Various types gauges are used for this purpose, however, none them seems to be suitable task since frequency range lies between 107 109 Hz, whereas all mechanical have bandwidth below Hz. Therefore, mathematical processing measurements is required reconstruction actual wave forms. In article, signal...
The results of experimental studies the convergence shock waves (SWs) generated by underwater electrical explosion a spherical wire array supplied current pulse with an amplitude ∼300 kA and rise time ∼1.1 μs are reported. In experiments, power spectrum light emission from optical fiber, copper tube, time-dependent resistance resistor placed in equatorial plane were measured. A comparison data numerical simulations SW shows that keeps its uniformity along major part towards implosion origin.
The article discusses the practical experience, prospects and vectors of development financial investigations in Kazakhstan, problems associated with search return assets located abroad. authors focus on main obstacles faced by law enforcement agencies investigation crimes, as well existing mechanisms for fraudulently acquired funds from highlights examples successful unsuccessful asset recovery, provides recommendations improving situation this area.
Summary form only given. Converging strong shock wave, generated by underwater electrical explosion of a spherical wire array, was used to generate plasma inside copper tube (3 mm outer diameter and 1.4 inner diameter) placed at the equatorial plane. The array consisting 40 wires each 100 μm diameter, 30 mm. this current pulse ~200 kA in amplitude rise time ~1μs supplied high-current generator charged up 27 kV, results an aperiodic discharge when almost all stored energy deposited exploding...
Summary form only given. The results of experimental studies a converging shock wave generated by underwater electrical explosion spherical wire array are reported. Two high-current generators, sub-microsecond (~ 350 ns rise time and ~550 kA current amplitude) microsecond (~1.1 μs ~300 timescale were used for explosion. In the latter case, addition energy was transferred to water flow imploding due global pressure discharge current. experiments, power spectrum self-light emission from an...
Summary form only given. Underwater electrical explosion of wire arrays is a promising method obtaining extreme states water (T > 1 eV, P 1010 TPa). These are obtained in the vicinity implosion strong converging shock waves generated by array explosion. Explosions cylindrical and spherical were studied which latter results higher parameters due to wave convergence smaller region (origin sphere as opposed an axis cylinder). Latest our laboratory show that one can achieve even with same amount...
The generation of strong (≥30 T) magnetic fields is important for basic research and different applications. such involves high energy (>100 kJ) pulse generators >100 T are usually obtained by destructive methods. measurement either Hall probes or B-dots fiber optic probes. Here we present the results measuring a pulsed field up to 50 generated single/three turns coils. coils were placed in water supplied ~230 kA current with rise time ~1 μs produced generator stored ~3 kJ. Due Verdet...
Summary form only given. Experimental studies of a spherical converging shock wave (SW) interaction with preliminary formed plasma are presented. The SW was generated by an underwater electrical explosion Cu wire array (radius 15 mm, number wires 40, and diameter 0.1 mm) supplied 240-kA amplitude current pulse rise time ~0.8 μs. 40 Pa propane discharge between the cathode anode electrodes, placed at distance 1.5 mm apart, inside 2 inner quartz capillary located equatorial plane array. light...
Summary form only given. (Results of generation converging Strong Shock Waves (SSW) generated by underwater electrical explosion cylindrical and spherical Cu Al wire arrays are presented. High-current generators with stored energy 10 kJ 5 output current amplitudes up to 500 kA 300 rise time around 350 ns 1000 ns, respectively, were used explode varying lengths, radii number wires. It was shown that the implosion SSW lead extreme state water pressure several tens Mbar, density 8 g/cm <sup...
Summary form only given. The results of experimental and numerical studies spherical implosion converging strong shock waves (SSW) generated using underwater electrical explosion Cu wire arrays are reported. In the experiment, a ~ 4 kJ pulse generator with discharged current amplitude -300 kA, rise time 1 μs was used for array explosion. Spherical radii 10 mm, 12.5 15 mm 20 were tested. Number wires varied in range 20-40 different diameters 0.1-0.2 mm. A largest wave velocity, pressure,...
Underwater electrical wire explosion (UEWE) has been demonstrated to be a robust approach in the research of matter at extreme conditions, main goal high energy density physics (HEDP). Indeed, applying pulse generators with stored several kJ allows one achieve <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\geq 10^{8}\mathrm{J}/(\text{kg}\times \mathrm{s})$</tex> deposition rate, pressure xmlns:xlink="http://www.w3.org/1999/xlink">$>...
Studies of properties various materials at extreme conditions is subject which related to Warm Dense Plasma and High Energy Density Matter. We explored how the resistivity temperature wires made tin, molybdenum, silver, platinum evolves with time during underwater electrical explosion by ~110 kA in amplitude current pulse rise-time ~220 ns [1]. The discharge voltage were measured using a Tektronix high divider Rogowski coils, respectively. Shadow streak images exploding wire generated shock...
Results of generation extreme state water in the vicinity implosion axis converging strong cylindrical and spherical shock waves are reported. The wave was produced by underwater electrical explosion either Cu or Al wire arrays. A 10 kJ pulse generator with a current amplitude ≤ 500 kA rise time 350 ns used to explode arrays varying lengths, radii number wires. Hydrodynamic numerical simulations coupled SESAME equation for experimental data propagation, energy deposition rate array light...