Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Petr Hoffer"'
Publikováno v:
Plasma, Vol 7, Iss 2, Pp 316-328 (2024)
This study utilizes the Kerr effect in the analysis of a pulsed electric field (intensity ~108 V/m, limited by the liquid dielectric strength) in deionized water at the sub-nanosecond time scale. The results provide information about voltage waveform
Externí odkaz:
https://doaj.org/article/a14d587fe8f94c4686549bba67545228
Publikováno v:
Plasma, Vol 4, Iss 1, Pp 183-200 (2021)
The microscopic physical mechanisms of micro-discharges produced in liquid waters by nanosecond high-voltage pulses are quite complex phenomena, and relevant coherent experimentally supported theoretical descriptions are yet to be provided. In this s
Externí odkaz:
https://doaj.org/article/fdaccc92d3524a7080701849d2e683f0
Publikováno v:
Plasma Chemistry and Plasma Processing.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4402c8db22379b465628bef85560b505
https://doi.org/10.1007/s11090-023-10325-y
https://doi.org/10.1007/s11090-023-10325-y
Autor:
Alexandr Frolov, Vitaliy Stelmashuk, Karel Kolacek, Vaclav Prukner, Andrii Tuholukov, Petr Hoffer, Jaroslav Straus, Jiri Schmidt, Vit Jirasek, Eduardo Oliva
Publikováno v:
Journal of Physics D: Applied Physics. 56:285201
The pressure in an underwater discharge channel is the main parameter that influences all its applications. In this study, we investigate a relatively large gap with a plane-to-plane electrode geometry that uses the assistance of an injected gas bubb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac91e0296050af8795d44f423d2085a5
https://doi.org/10.1088/1361-6463/accaf3
https://doi.org/10.1088/1361-6463/accaf3
Publikováno v:
IEEE Transactions on Plasma Science. 48:491-499
The prime objective of this article is to determine the accuracy of prediction of underwater spark expansion using an incompressible approach. A spark channel expansion is studied experimentally using a high-speed camera and an optical hydrophone. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ef0c1ede50e5da79b8550d84f2152e8
https://doi.org/10.1109/tps.2019.2963536
https://doi.org/10.1109/tps.2019.2963536
Autor:
Vitaliy Stelmashuk, Andrii Tuholukov, Yakov E. Krasik, Petr Hoffer, Jiri Schmidt, Jaroslav Straus, Alexandr Frolov
Publikováno v:
Journal of Applied Physics. 133:033301
The results of experimental research on the acoustic and electrical characteristics of underwater spark discharges facilitated by a preliminary discharge are presented. The latter was produced through the application of a short duration high-voltage
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa854b00c746724291de8432327240ed
https://doi.org/10.1063/5.0132851
https://doi.org/10.1063/5.0132851
Autor:
Vitaliy Stelmashuk, Vaclav Prukner, Karel Kolacek, Andrii Tuholukov, Petr Hoffer, Jaroslav Straus, Oleksandr Frolov, Vit Jirasek
Publikováno v:
Processes; Volume 10; Issue 8; Pages: 1474
This paper is aimed at the investigation of the acoustic and spectral characteristics of underwater electric sparks generated between two plate electrodes, using synchronized gas bubble injection. There are two purposes served by discharge initiation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e830834b27d27958375ce57db1a7b33
https://doi.org/10.3390/pr10081474
https://doi.org/10.3390/pr10081474
Publikováno v:
Plasma
Volume 4
Issue 1
Pages 11-200
Plasma, Vol 4, Iss 11, Pp 183-200 (2021)
Volume 4
Issue 1
Pages 11-200
Plasma, Vol 4, Iss 11, Pp 183-200 (2021)
The microscopic physical mechanisms of micro-discharges produced in liquid waters by nanosecond high-voltage pulses are quite complex phenomena, and relevant coherent experimentally supported theoretical descriptions are yet to be provided. In this s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9634ebfec4b7f1441b4e7764afd6be09
Publikováno v:
Plasma Sources Science and Technology. 31:015005
Gaseous micro-bubbles dispersed in liquid water represent perturbations of the homogeneity of the liquid and influence the onset of electrical discharge in the bulk liquid. In this study, we systematically examined shadowgraph images to analyse the g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd1fceb736031a7b0ff6e7f06fac67aa
https://doi.org/10.1088/1361-6595/ac3bd6
https://doi.org/10.1088/1361-6595/ac3bd6
Autor:
Petr Hoffer, V. Stelmashuk
Publikováno v:
IEEE Transactions on Plasma Science. 45:3160-3165
This paper describes the time evolution of ball plasmoids generated by millisecond atmospheric discharge in contact with water. The aim of this paper was to clarify an initiation and a formation mechanism of an atmospheric ball plasmoid. The use of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a06bdc2726380eaae3ec2c1541d2fc4
https://doi.org/10.1109/tps.2017.2770224
https://doi.org/10.1109/tps.2017.2770224