The effect of nanovoid elongation on electron multiplication during (sub)nanosecond electrical breakdown

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00119096" target="_blank" >RIV/00216224:14310/21:00119096 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.37904/nanocon.2020.3726" target="_blank" >https://doi.org/10.37904/nanocon.2020.3726</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/nanocon.2020.3726" target="_blank" >10.37904/nanocon.2020.3726</a>

Result language

angličtina

Original language name

The effect of nanovoid elongation on electron multiplication during (sub)nanosecond electrical breakdown

Original language description

We investigate how the geometry of nanovoids present during the (sub)nanosecond electrical breakdown in liquid water influences the electron multiplication. Our analysis uses a particle-tracing Monte Carlo simulation toolkit Geant4-DNA. The electron multiplication in nanovoids is one of the possible scenarios describing the charge generation in liquid water. In our simplified model, we assume a constant homogeneous electric field, an ellipsoidal shape of nanovoids, and isotropic distribution of the primary electron's velocity. The quantity of interest is the number of ionizations per number of launched primary electrons. We study this yield of electrons as we vary the ellipsoid eccentricity parameter while keeping the volume constant. The nanovoids with zero eccentricity (spherical case) produce smaller yield since the suppressed length does not favor electron multiplication. On the other hand, a very prolonged ellipsoid causes the loss of most electrons because of early collisions with the void-liquid interface. Therefore, for a particular value of eccentricity, the yield is maximal. The results of this study contribute to the elucidation of the initial phases of discharge evolution in polar liquids and is one of the first steps towards quantitative assessment of the importance of microscopic parameters involved. The understanding of this phenomenon promises the explanation of macroscopic parameters observed in the (sub)nanosecond electrical breakdown experiments.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/GA18-04676S" target="_blank" >GA18-04676S: Fundamental phenomena of nanosecond discharge in liquid water</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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

Article name in the collection

NANOCON 2020: 12th International Conference on Nanomaterials - Research & Application

ISBN

9788087294987

ISSN

2694-930X

e-ISSN

—

Number of pages

6

Pages from-to

167-172

Publisher name

TANGER Ltd.

Place of publication

Ostrava

Event location

Brno

Event date

Oct 21, 2020

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000664505500028