On modeling of “plasmoid” created by electric discharge

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F18%3A00498228" target="_blank" >RIV/61389021:_____/18:00498228 - isvavai.cz</a>

Výsledek na webu

<a href="http://iopscience.iop.org/article/10.1088/1742-6596/996/1/012012/meta" target="_blank" >http://iopscience.iop.org/article/10.1088/1742-6596/996/1/012012/meta</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/996/1/012012" target="_blank" >10.1088/1742-6596/996/1/012012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On modeling of “plasmoid” created by electric discharge

Popis výsledku v původním jazyce

Plasma processes involving liquid phases are widely used in various applications, such as biomedical processes, shock wave generation for medical applications, material processes, sterilization in water treatment and others. Two main configurations of high voltage electrodes submersed in water have been used for an electrical discharge generation: pin˗to˗pin and pin˗to˗plate. An electrical breakdown in the plate˗to˗plate configuration is generally difficult to reproduce, because there is a uniform and weak electric field in the interelectrode region in this geometry. One major advantage of using plate electrodes is their greater “wear hardness” to high-energy discharges. The plate electrodes can withstand extremely high energy deposition at which the pin electrode is quickly destroyed. Due to that the system of plate electrodes is proposed to be used for shock wave generation in litotripsy. The electrical discharge between plate electrodes can be initiated by creating an inhomogeneity in the electrical field. Two methods of discharge initiation between plate electrodes are proposed for this aim: 1) focusing of a shock wave in the interelectrode region, 2) a bubble injection into the electrode gap. Both methods employ the fact that a typical order of magnitude of an electrical breakdown field for gas is 30 kV cm−1 , i.e. 30 times less than the electrical field required for the electrical breakdown in water. The physical mechanisms of discharge initiation and positive streamer propagation are discussed.

Název v anglickém jazyce

On modeling of “plasmoid” created by electric discharge

Popis výsledku anglicky

Plasma processes involving liquid phases are widely used in various applications, such as biomedical processes, shock wave generation for medical applications, material processes, sterilization in water treatment and others. Two main configurations of high voltage electrodes submersed in water have been used for an electrical discharge generation: pin˗to˗pin and pin˗to˗plate. An electrical breakdown in the plate˗to˗plate configuration is generally difficult to reproduce, because there is a uniform and weak electric field in the interelectrode region in this geometry. One major advantage of using plate electrodes is their greater “wear hardness” to high-energy discharges. The plate electrodes can withstand extremely high energy deposition at which the pin electrode is quickly destroyed. Due to that the system of plate electrodes is proposed to be used for shock wave generation in litotripsy. The electrical discharge between plate electrodes can be initiated by creating an inhomogeneity in the electrical field. Two methods of discharge initiation between plate electrodes are proposed for this aim: 1) focusing of a shock wave in the interelectrode region, 2) a bubble injection into the electrode gap. Both methods employ the fact that a typical order of magnitude of an electrical breakdown field for gas is 30 kV cm−1 , i.e. 30 times less than the electrical field required for the electrical breakdown in water. The physical mechanisms of discharge initiation and positive streamer propagation are discussed.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Journal of Physics: conference series

ISBN

—

ISSN

1742-6588

e-ISSN

—

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

Institute of physics

Místo vydání

Bristol

Místo konání akce

Moskva

Datum konání akce

22. 11. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000445819900012