Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Jaroslav Straus"'
Autor:
Huaiyu Cui, Alexandr Frolov, Jiri Schmidt, Jaroslav Straus, Tomas Burian, Vera Hajkova, Jaromir Chalupsky, Yongpeng Zhao, Karel Kolacek, Libor Juha
Publikováno v:
Applied Sciences, Vol 12, Iss 3, p 1251 (2022)
Monocrystalline barium fluoride (BaF2) slab targets were irradiated by focused 46.9-nm laser radiation at various fluence levels above the ablation threshold. Well-developed ablation patterns with sharp edges were studied by AFM (atomic force microsc
Externí odkaz:
https://doaj.org/article/0029f9cc3a7142698978c3a20c461e18
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
Autor:
V. Stelmashuk, Petr Hoffer, Jiri Schmidt, Petr Jiricek, J. Houdkova, Karel Kolacek, Andrii Tuholukov, Jaroslav Straus, Alexandr Frolov
Publikováno v:
Applied Optics. 60:8766
Thin-film Al filters are very popular owing to their high transmittance in the wavelength range of 17–67 nm and low transmittance in the visible and near-UV regions; however, they are prone to oxidation. The amorphous A l 2 O 3 layers on the Al sur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::397d1cf1b96eaf6bb0da016f6a756103
https://doi.org/10.1364/ao.432592
https://doi.org/10.1364/ao.432592
Autor:
Alexandr Frolov, Libor Juha, V. Stelmashuk, Petr Lukes, Karel Kolacek, Jiri Schmidt, Petr Hoffer, Jaroslav Straus
Publikováno v:
Optics Damage and Materials Processing by EUV/X-ray Radiation VII.
Thin film Al filters, very popular for their high transmittance in the wavelength range 17 to 67 nm and simultaneously low transmittance in the visible and near UV region, are prone to oxidation. The amorphous Al2O3 layers on the Al surfaces have muc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8eb35d682cbe0b58bd54e84d7b63a3d
https://doi.org/10.1117/12.2521988
https://doi.org/10.1117/12.2521988
Publikováno v:
Optics Damage and Materials Processing by EUV/X-ray Radiation VII.
We report results of ablation experiments of different materials through Ni grid with an intense XUV laser beam. As a source of XUV radiation (energy of about 100 J) with wavelength of 46.9 nm was used high-current capillary discharge driver. Abla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::188d8c4213aef68077ba7bec3b4176d2
https://doi.org/10.1117/12.2521444
https://doi.org/10.1117/12.2521444
Modelling of time development of cylindrical underwater spark channel in compressible viscous liquid
Autor:
Jiri Schmidt, Alexandr Frolov, Jaroslav Straus, Eduardo Oliva, Karel Kolacek, Petr Hoffer, Andrii Tuholukov, V. Stelmashuk
Publikováno v:
Journal of Physics D: Applied Physics. 53:505201
In this study, a new finite-difference cylindrical model of long underwater spark is developed that allows us to numerically calculate the time evolution of the underwater spark channel from a given power input. A one dimensional simulation starts in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23855f2a3109ef8ab10340fc00e613a1
https://doi.org/10.1088/1361-6463/abb048
https://doi.org/10.1088/1361-6463/abb048
Autor:
Karel Kolacek, Libor Juha, Jaroslav Straus, M. Toufarová, Oleksandr Frolov, Jiri Matejicek, Jiri Schmidt, Monika Vilémová, Aleš Jäger, Koichi Kasuya, Andrey Choukourov
Publikováno v:
Laser and Particle Beams
The experimental study of damage to tungsten (W), molybdenum (Mo), and silicon carbide (SiC) surfaces induced by focused extreme ultraviolet laser radiation (λ ~ 47 nm/~1.5 ns/21–40 µJ) is presented. It was found that W and Mo behaved similarly:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb4d853747f6042acfb4c98cc845a9cd