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V. Babicky
Academy of Sciences of the Czech Republic
Analytical chemistryPhysicsCorona dischargeShock waveElectric discharge
28Publications
9H-index
442Citations
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Publications 27
Newest
Jun 25, 2017 in ICDL (International Conference on Dielectric Liquids)
#1V. BabickyH-Index: 9
#2Martin ClupekH-Index: 16
Last. Petr LukesH-Index: 21
view all 3 authors...
Method of determining nanosecond pulse parameters and energy deposited to the nanosecond discharge in liquids using back current shunt mounted in the middle of the supply coaxial cable is presented. A simple simulation of the discharge chamber circuit with respect to the parasitic impedances was performed for better understanding of the shape of the reflected pulse and to verify limitations of this method.
3 CitationsSource
Jun 25, 2017 in ICDL (International Conference on Dielectric Liquids)
#1Petr LukesH-Index: 21
#2Martin ClupekH-Index: 16
Last. Milan SimekH-Index: 17
view all 5 authors...
We have evaluated chemical activity of the nanosecond discharge in bulk liquid water by measuring the plasmachemical production of hydrogen peroxide and oxidation of phenol used as chemical probe of OH radicals. Nanosecond pulse generator was used as a source of high voltage pulses (6 ns FWHM) with adjustable amplitude of the positive polarity (60–110 kV) and pulse energy 50–150 mJ/pulse. Obtained results gave clear evidence about the plasmachemical production of OH radicals by nanosecond discha...
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Jun 1, 2017 in ICDL (International Conference on Dielectric Liquids)
#1Branislav PongrácH-Index: 6
#2Milan SimekH-Index: 17
Last. Petr LukesH-Index: 21
view all 5 authors...
Basic morphologic structure and emission fingerprints of micro-discharges produced in deionized water by short high voltage pulses (duration of 6 ns and amplitude of + 100 kV) are presented. Time-resolved ICCD images evidence typical streamer-like branched filamentary structure of the discharge with propagation velocity 2–4×105 m/s. Emission spectra show a broad-band continuum evolving during the first few nanoseconds followed by the well-known HI/OI atomic lines. The electron densities were est...
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Jun 19, 2016 in ICOPS (International Conference on Plasma Science)
#1Petr LukesH-Index: 21
#2Martin ClupekH-Index: 16
Last. Juergen F. Kolb (Leibniz Association)H-Index: 34
view all 6 authors...
Electrical discharge plasmas in liquids have been studied for a number of years for applications in different environmental, biological or medical applications. However, the physics underlying the complex phenomena of electric discharge formation in liquid media as well as the chemistry of plasma/liquid interactions induced by these discharges is not fully understood. OH radical is one of the most strongly oxidative species produced by plasma in water and is also building block of H2O2 which is ...
2 CitationsSource
#1Petr LukesH-Index: 21
#2Martin ClupekH-Index: 16
Last. B. MarsalekH-Index: 1
view all 7 authors...
Novel apparatus for the generation of underwater plasma based on DC diaphragm discharge excited in a vapor bubble has been developed for decontamination and disinfection of conductive water. The apparatus allows deposition of relatively high applied power into the discharge (order of kW) and the treatment of a relatively large volume of liquid (order of L/min). The apparatus is operated at the quasi-pulse regime with self-terminating discharge pulses (with a repetition rate of 15–20 Hz) generate...
9 CitationsSource
#1Petr LukesH-Index: 21
#2Martin ClupekH-Index: 16
Last. V. BabickyH-Index: 9
view all 3 authors...
Pulsed corona discharge in atmospheric air was generated above a water surface using a reticulated vitreous carbon planar electrode. The effects of the discharge gap spacing and solution conductivity on the characteristics of the discharge were studied. Images of the discharge filamentary patterns propagating over the water surface are presented.
20 CitationsSource
Jun 26, 2011 in ICDL (International Conference on Dielectric Liquids)
#1Petr Lukes (CAS: Academy of Sciences of the Czech Republic)H-Index: 21
#2Martin Clupek (CAS: Academy of Sciences of the Czech Republic)H-Index: 16
Last. Pavel Sunka (CAS: Academy of Sciences of the Czech Republic)H-Index: 15
view all 4 authors...
Electrical breakdown of water using porous ceramic-coated rod electrodes were investigated for two types of ceramics, oxide (corundum) and silicates (almandine). Properties of the ceramic layer and its interaction with the electrolyte, i.e., surface chemistry at the electrolyte/ceramic surface interface, were found as important factors in generating electrical discharges in water. The buildup of surface charge, which was determined by the polarity of the applied voltage, pH and chemical composit...
Source
#1Petr Lukes (CAS: Academy of Sciences of the Czech Republic)H-Index: 21
#2Martin Clupek (CAS: Academy of Sciences of the Czech Republic)H-Index: 16
Last. Vaclav JandaH-Index: 13
view all 5 authors...
The effects of tungsten material used as a high-voltage needle electrode on the production of hydrogen peroxide and the degradation of dimethylsulfoxide (DMSO) caused by a pulsed corona discharge in water were investigated. A reactor of needle?plate electrode geometry was used. The erosion of the tungsten electrodes by the discharge was evaluated. The yields of H2O2 production and the decomposition of DMSO by the discharge, which were obtained using the tungsten electrodes, were compared with th...
18 CitationsSource
#1Petr Lukes (CAS: Academy of Sciences of the Czech Republic)H-Index: 21
#2Martin Clupek (CAS: Academy of Sciences of the Czech Republic)H-Index: 16
Last. Pavel Sunka (CAS: Academy of Sciences of the Czech Republic)H-Index: 15
view all 4 authors...
Effects associated with the electrical breakdown of water using porous ceramic-coated rod electrodes were investigated for two types of ceramics, oxide (corundum) and silicates (almandine). Properties of the ceramic layer and its interaction with the electrolyte were found as important factors in the generation of electrical discharges in water. Initiation of the discharge depended not only on the permittivity and porosity of the ceramic, but also the surface charge formed on the ceramic, which ...
16 CitationsSource
Jun 1, 2009 in ICOPS (International Conference on Plasma Science)
#1Petr LukesH-Index: 21
#2Martin ClupekH-Index: 16
Last. Vaclav JandaH-Index: 13
view all 7 authors...
UV radiation in the 200-300 nm wavelength range with doses of several mJ/cm2 is known to cause lethal damage of cells. Amongst UV effects on bacteria is the dimerization of thymine bases in their DNA strands. This inhibits the ability of bacteria to replicate properly. The results obtained using the emission spectroscopy showed a radiation from the pulsed corona discharge in water in a wide range of wavelengths (200-1000 nm), which is dominated by the spectral lines of hydrogen and oxygen atom a...
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