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759 results on '"Renner, O."'

1. High Yield of Alpha Particles Generated in Proton-Boron Nuclear Fusion Reactions Induced in Solid Boron Hydride B${}_{18}$H${}_{22}$

Author

Krůs, M., Ehn, M., Kozlová, M., Bould, J., Pokorný, P., Gajdoš, P., Dudžák, R., Renner, O., Guldan, M., Myška, M., Škoda, L., and Londesborough, M. G. S.

Subjects
Physics - Plasma Physics
Abstract

The use of solid boron hydride molecules as a fuel for proton-boron fusion was proposed by M. Kr\r{u}s and M. Londesborough at "Interaction of Inorganic Clusters, Cages, and Containers with Light" workshop in November 2021. Here we demonstrate experimentally, for first time, that the solid boron hydride, octadecaborane - \textit{anti}-B${}_{18}$H${}_{22}$, produces a relatively high yield of alpha particles of about $10^9$ per steradian using a sub-nanosecond, low-contrast laser pulse (PALS) with a typical intensity of $10^{16}$ Wcm${}^{-2}$. In contrast to previously published proton-boron studies, the boron hydrides, due to their composition containing only atoms of boron and hydrogen, represent a natural choice for future proton-boron nuclear fusion schemes., Comment: 17 pages, 6 figures

Published
2024

2. Observation and modelling of Stimulated Raman Scattering driven by an optically smoothed laser beam in experimental conditions relevant for Shock Ignition

Author

Cristoforetti, G., Huller, S., Koester, P., Antonelli, L., Atzeni, S., Baffigi, F., Batani, D., Baird, C., Booth, N., Galimberti, M., Glize, K., Heron, A., Khan, M., Loiseau, P., Mancelli, D., Notley, M., Oliveira, P., Renner, O., Smid, M., Schiavi, A., Tran, G., Woolsey, N. C., and Gizzi, L. A.

Subjects
Physics - Plasma Physics
Abstract

We report results and modelling of an experiment performed at the TAW Vulcan laser facility, aimed at investigating laser-plasma interaction in conditions which are of interest for the Shock Ignition scheme to Inertial Confinement Fusion, i.e. laser intensity higher than 10^16 W/cm2 impinging on a hot (T > 1 keV), inhomogeneous and long scalelength preformed plasma. Measurements show a significant SRS backscattering (4 - 20% of laser energy) driven at low plasma densities and no signatures of TPD/SRS driven at the quarter critical density region. Results are satisfactorily reproduced by an analytical model accounting for the convective SRS growth in independent laser speckles, in conditions where the reflectivity is dominated by the contribution from the most intense speckles, where SRS gets saturated. Analytical and kinetic simulations well reproduce the onset of SRS at low plasma densities in a regime strongly affected by non linear Landau damping and by filamentation of the most intense laser speckles. The absence of TPD/SRS at higher densities is explained by pump depletion and plasma smoothing driven by filamentation. The prevalence of laser coupling in the low density profile justifies the low temperature measured for hot electrons (7 - 12 keV), well reproduced by numerical simulations.

Published
2021

4. Semi-analytical approaches to study hot electrons in the shock ignition regime

Author

Afshari, M., Antonelli, L., Barbato, F., Folpini, G., Jakubowska, K., Krousky, E., Renner, O., Smid, M., and Batani, D.

Subjects
Physics - Plasma Physics
Abstract

Hot electrons role in shock generation and energy deposition to hot dense core is crucial for the shock ignition scheme implying the need for their characterization at laser intensities of interest for shock ignition. In this paper we analyze the experimental results obtained at the PALS laboratory and provide an estimation of hot electrons temperature and conversion efficiency using a semi analytical approach, including Harrach-Kidder's model., Comment: Has been accepted in Physics of Plasma journal

Published
2018
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6. Characterization of hot electrons generated by laser–plasma interaction at shock ignition intensities

Author

Filippov, E. D., primary, Khan, M., additional, Tentori, A., additional, Gajdos, P., additional, Martynenko, A. S., additional, Dudzak, R., additional, Koester, P., additional, Zeraouli, G., additional, Mancelli, D., additional, Baffigi, F., additional, Gizzi, L. A., additional, Pikuz, S. A., additional, Nicolaï, Ph.D., additional, Woolsey, N. C., additional, Fedosejevs, R., additional, Krus, M., additional, Juha, L., additional, Batani, D., additional, Renner, O., additional, and Cristoforetti, G., additional

Published
2023
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7. Investigation on the origin of hot electrons in laser plasma interaction at shock ignition intensities

Author

Cristoforetti, G., primary, Baffigi, F., additional, Batani, D., additional, Dudzak, R., additional, Fedosejevs, R., additional, Filippov, E. D., additional, Gajdos, P., additional, Juha, L., additional, Khan, M., additional, Koester, P., additional, Krus, M., additional, Mancelli, D., additional, Martynenko, A. S., additional, Nicolai, Ph., additional, Pikuz, S. A., additional, Renner, O., additional, Tentori, A., additional, Volpe, L., additional, Woolsey, N., additional, Zeraouli, G., additional, and Gizzi, L. A., additional

Published
2023
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8. P3: An installation for high-energy density plasma physics and ultra-high intensity laser–matter interaction at ELI-Beamlines

Author

Weber, S., Bechet, S., Borneis, S., Brabec, L., Bučka, M., Chacon-Golcher, E., Ciappina, M., DeMarco, M., Fajstavr, A., Falk, K., Garcia, E.-R., Grosz, J., Gu, Y.-J., Hernandez, J.-C., Holec, M., Janečka, P., Jantač, M., Jirka, M., Kadlecova, H., Khikhlukha, D., Klimo, O., Korn, G., Kramer, D., Kumar, D., Lastovička, T., Lutoslawski, P., Morejon, L., Olšovcová, V., Rajdl, M., Renner, O., Rus, B., Singh, S., Šmid, M., Sokol, M., Versaci, R., Vrána, R., Vranic, M., Vyskočil, J., Wolf, A., and Yu, Q.

Published
2017
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11. Commissioning results from the high-repetition rate nanosecond-kilojoule laser beamline at the extreme light infrastructure

Author

Condamine, F P, primary, Jourdain, N, additional, Kramer, D, additional, Trojek, P, additional, Gintrand, A, additional, Fauvel, G, additional, Pandikian, P, additional, Bartoníček, J, additional, Friedman, G, additional, Havlík, M, additional, Hernandez, J-C, additional, Hubáček, J, additional, Laštovička, T, additional, Orna, V, additional, Renner, O, additional, Rubovič, P, additional, Rus, B, additional, Singh, R L, additional, Vyhlídka, Š, additional, and Weber, S, additional

Published
2022
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12. Influence of the magnetic field on properties of hot electron emission from ablative plasma produced at laser irradiation of a disc-coil target

Author

Pisarczyk, T, primary, Renner, O, additional, Dudzak, R, additional, Chodukowski, T, additional, Rusiniak, Z, additional, Domanski, J, additional, Badziak, J, additional, Dostal, J, additional, Krupka, M, additional, Singh, S, additional, Klir, D, additional, Ehret, M, additional, Gajdos, P, additional, Zaras-Szydłowska, A, additional, Rosinski, M, additional, Tchórz, P, additional, Szymanski, M, additional, Krasa, J, additional, Burian, T, additional, Pfeifer, M, additional, Cikhardt, J, additional, Jelinek, S, additional, Kocourkova, G, additional, Batani, D, additional, Batani, K, additional, Santos, J, additional, Vlachos, C, additional, Ospina-Bohórquez, V, additional, Volpe, L, additional, Borodziuk, S, additional, Krus, M, additional, and Juha, L, additional

Published
2022
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13. Magnetized plasma implosion in a snail target driven by a moderate-intensity laser pulse

Author

Pisarczyk, T., Gus’kov, S. Yu, Zaras-Szydłowska, A., Dudzak, R., Renner, O., Chodukowski, T., Dostal, J., Rusiniak, Z., Burian, T., Borisenko, N., Rosinski, M., Krupka, M., Parys, P., Klir, D., Cikhardt, J., Rezac, K., Krasa, J., Rhee, Y.-J., Kubes, P., Singh, S., Borodziuk, S., Krus, M., Juha, L., Jungwirth, K., Hrebicek, J., Medrik, T., Golasowski, J., Pfeifer, M., Skala, J., Pisarczyk, P., and Korneev, Ph.

Published
2018
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27. Studies of laser-plasma interaction physics with low-density targets for direct-drive inertial confinement fusion on the Shenguang III prototype

Author

Tikhonchuk, V. T., primary, Gong, T., additional, Jourdain, N., additional, Renner, O., additional, Condamine, F. P., additional, Pan, K. Q., additional, Nazarov, W., additional, Hudec, L., additional, Limpouch, J., additional, Liska, R., additional, Krůs, M., additional, Wang, F., additional, Yang, D., additional, Li, S. W., additional, Li, Z. C., additional, Guan, Z. Y., additional, Liu, Y. G., additional, Xu, T., additional, Peng, X. S., additional, Liu, X. M., additional, Li, Y. L., additional, Li, J., additional, Song, T. M., additional, Yang, J. M., additional, Jiang, S. E., additional, Zhang, B. H., additional, Huo, W. Y., additional, Ren, G., additional, Chen, Y. H., additional, Zheng, W., additional, Ding, Y. K., additional, Lan, K., additional, and Weber, S., additional

Published
2021
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29. Design, installation and commissioning of the ELI-Beamlines high-power, high-repetition rate HAPLS laser beam transport system to P3

Author

Borneis, S., primary, Laštovička, T., additional, Sokol, M., additional, Jeong, T.-M., additional, Condamine, F., additional, Renner, O., additional, Tikhonchuk, V., additional, Bohlin, H., additional, Fajstavr, A., additional, Hernandez, J.-C., additional, Jourdain, N., additional, Kumar, D., additional, Modřanský, D., additional, Pokorný, A., additional, Wolf, A., additional, Zhai, S., additional, Korn, G., additional, and Weber, S., additional

Published
2021
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30. Observation and modelling of stimulated Raman scattering driven by an optically smoothed laser beam in experimental conditions relevant for shock ignition

Author

Cristoforetti, G., primary, Hüller, S., additional, Koester, P., additional, Antonelli, L., additional, Atzeni, S., additional, Baffigi, F., additional, Batani, D., additional, Baird, C., additional, Booth, N., additional, Galimberti, M., additional, Glize, K., additional, Héron, A., additional, Khan, M., additional, Loiseau, P., additional, Mancelli, D., additional, Notley, M., additional, Oliveira, P., additional, Renner, O., additional, Smid, M., additional, Schiavi, A., additional, Tran, G., additional, Woolsey, N. C., additional, and Gizzi, L. A., additional

Published
2021
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38. X-ray time-resolved diagnostics of hot electron generation in shock ignition relevant experiments

Author

Filippov, E.D., primary, Martynenko, A.S., additional, Cervenak, M., additional, Antonelli, L., additional, Baffigi, F., additional, Cristoferetti, G., additional, Gizzi, L.A., additional, Pisarczyk, T., additional, Mancelli, D., additional, Ospina, V., additional, Krus, M., additional, Dudzak, R., additional, Pikuz, S.A., additional, Batani, D., additional, and Renner, O., additional

Published
2020
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39. Hot electron retention in laser plasma created under terawatt subnanosecond irradiation of Cu targets

Author

Pisarczyk, T, primary, Kalal, M, additional, Gus’kov, S Yu, additional, Batani, D, additional, Renner, O, additional, Santos, J, additional, Dudzak, R, additional, Zaras-Szydłowska, A, additional, Chodukowski, T, additional, Rusiniak, Z, additional, Dostal, J, additional, Krasa, J, additional, Krupka, M, additional, Kochetkov, Iu, additional, Singh, S, additional, Cikhardt, J, additional, Burian, T, additional, Krus, M, additional, Pfeifer, M, additional, Cristoforetti, G, additional, Gizzi, L A, additional, Baffigi, F, additional, Antonelli, L, additional, Demchenko, N N, additional, Rosinski, M, additional, Terwińska, D, additional, Borodziuk, S, additional, Kubes, P, additional, Ehret, M, additional, Juha, L, additional, Skala, J, additional, and Korneev, Ph, additional

Published
2020
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40. Publisher's Note: “Laser-driven strong shocks with infrared lasers at intensity of 1016 W/cm2” [Phys. Plasmas 26, 112708 (2019)]

Author

Antonelli, L., primary, Trela, J., additional, Barbato, F., additional, Boutoux, G., additional, Nicolaï, Ph., additional, Batani, D., additional, Tikhonchuk, V., additional, Mancelli, D., additional, Tentori, A., additional, Atzeni, S., additional, Schiavi, A., additional, Baffigi, F., additional, Cristoforetti, G., additional, Viciani, S., additional, Gizzi, L. A., additional, Smid, M., additional, Renner, O., additional, Dostal, J., additional, Dudzak, R., additional, Juha, L., additional, and Krus, M., additional

Published
2020
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42. High-resolution x-ray imaging of extended lasing plasmas

Author

Forster, E., Hutcheon, R.J., Renner, O., Uschmann, I., Vollbrecht, M., Nantel, M., Klisnick, A., and Jaegle, P.

Subjects
X-ray lasers -- Analysis, Laser plasmas, Astronomy, Physics
Abstract

An x-ray imaging system with a bent focusing crystal was used for time-resolved one-dimensional imaging of a long plasma column of highly ionized aluminum. This scheme uses a focusing geometry with a spherically bent crystal and a slit on the Rowland circle. Alternative schemes of x-ray monochromatic imaging are briefly discussed. The homogeneity of the up to 40-mm-long laser-generated plasma column was studied with a temporal resolution of 100 ps. The potential spatial resolution of the instrument is 90 [[micro]meter] or better. Monochromatic images taken on the resonance He[Alpha] line of Al XII characterize the homogeneity of a plasma generated to study a recombination x-ray laser scheme, giving an amplified spontaneous emission in Al XI. Key words: X-ray optics, x-ray imaging, x-ray lasers.

Published
1997

43. Progress in understanding the role of hot electrons for the shock ignition approach to inertial confinement fusion

Author

Batani, D., Antonelli, L., Barbato, F., Boutoux, G., Colaitis, A., Feugeas, J.L., Folpini, G., Mancelli, D., Nicolai, Ph., Santos, J., Trela, J., Tikhonchuk, V., Badziak, J., Choudukowski, T., Jakubowska, K., Kalinowska, Z., Pisarczyk, T., Rosinki, M., Sawicka, M., Baffigi, F., Cristoforetti, G., D'Amato, F., Koester, P., Gizzi, L.A., Viciani, S., Atzeni, S., Schiavi, A., Skoric, M., Gus'kov, S., Honrubia Checa, José Javier, Limpouch, J., Klimo, O., Skala, J., Gu, Y.J., Krousky, E., Renner, O., Smid, M., Weber, S., Dudzak, R., Krus, M., Ullschmied, J., Batani, D., Antonelli, L., Barbato, F., Boutoux, G., Colaitis, A., Feugeas, J.L., Folpini, G., Mancelli, D., Nicolai, Ph., Santos, J., Trela, J., Tikhonchuk, V., Badziak, J., Choudukowski, T., Jakubowska, K., Kalinowska, Z., Pisarczyk, T., Rosinki, M., Sawicka, M., Baffigi, F., Cristoforetti, G., D'Amato, F., Koester, P., Gizzi, L.A., Viciani, S., Atzeni, S., Schiavi, A., Skoric, M., Gus'kov, S., Honrubia Checa, José Javier, Limpouch, J., Klimo, O., Skala, J., Gu, Y.J., Krousky, E., Renner, O., Smid, M., Weber, S., Dudzak, R., Krus, M., and Ullschmied, J.

Abstract

This paper describes the results of a series of experiments conducted with the PALS laser at intensities of interest for the shock ignition approach to inertial fusion. In particular, we addressed the generation of hot electrons (HE) (determining their average energy and number), as well as the parametric instabilities which are producing them. In addition, we studied the impact of HE on the formation and dynamics of strong shocks.

Published
2019

44. Laser-driven strong shocks with infrared lasers at intensity of 1016 W/cm2

Author

Antonelli, L., Trela, J., Barbato, F., Boutoux, G., Nicolaï, P., Batani, D., Tikhonchuk, V., Mancelli, D., Tentori, A., Atzeni, S., Schiavi, A., Baffigi, F., Cristoforetti, G., Viciani, S., Gizzi, L. A., (0000-0002-7162-7500) Smid, M., Renner, O., Dostal, J., Dudzak, R., Juha, L., Krus, M., Antonelli, L., Trela, J., Barbato, F., Boutoux, G., Nicolaï, P., Batani, D., Tikhonchuk, V., Mancelli, D., Tentori, A., Atzeni, S., Schiavi, A., Baffigi, F., Cristoforetti, G., Viciani, S., Gizzi, L. A., (0000-0002-7162-7500) Smid, M., Renner, O., Dostal, J., Dudzak, R., Juha, L., and Krus, M.

Abstract

We present the results of an experiment on laser-driven shock waves performed at the Prague Asterix Laser system (PALS), where the fundamental frequency of the laser (1315 nm) is used to launch a strong shock in planar geometry. The experiment aims to characterize both shock waves and hot electrons generated at intensities of ’ 1016 W=cm2 . It is shown that, in these interaction conditions, hydrodynamics is strongly impacted by noncollisional mechanisms, and the role of the hot electrons, generated by parametric instabilities, is essential in determining shock dynamics.

Published
2019

49. X-ray spectroscopic study of charge exchange phenomena in plasma-wall interaction

Author

Renner O., Krouský E., Šmíd M., Liska R., Váchal P., Khattak F.Y., Dalimier E., and Oks E.

Subjects
Physics, QC1-999
Abstract

Jets of energetic ions launched at laser-burnt-through foils represent an efficient tool for investigation of plasma interaction with solid surfaces (plasma-wall interaction, PWI) and for description of transient phenomena occurring close to the walls. Highly charged ions approaching the secondary target interpenetrate the near surface layer, collide with the counter-propagating matter and capture a large number of electrons. This results in a creation of atoms in highly excited Rydberg states or hollow ions with multiple inner vacancies; plasma jet and target ions may also undergo charge exchange (CE) processes. We report PWI experiments with Al/Si(PMMA) and Al/C targets irradiated at normal or oblique laser incidence. The distinct dip structures observed in red wings of Al Lyγ self-emission is interpreted in terms of CE between C6+ and Al12+ in the near-wall zone. The spectroscopic identification of CE phenomena is supported by results of analytical and numerical calculations.

Published
2013
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50. Modelling of ion deceleration in interpenetrating laser-generated plasma plumes

Author

Larroche O., Liska R., Renner O., and Dalimier E.

Subjects
Physics, QC1-999
Abstract

The modelling of intense laser interaction with solid targets represents a complicated complex of plasma physics and numerical methods. The presented simulations contribute to a better understanding of plasma-wall interactions by studying the interpenetration and mutual deceleration of two plasma plumes of different materials created on two foil targets. The initial phase is simulated by the 2D hydrodynamics code PALE until the plumes start to interpenetrate. The mixing, interpenetration and deceleration of the plumes cannot be modelled by standard hydrodynamic methods and a more advanced model has to be used. We employ the 1.5D multi-fluid code MULTIF which is designed for modelling of mixing, interpenetration and deceleration of several plasmas from different materials. The simulated velocity profiles of the Al ions reveal oscillations due to their deceleration and reflection. Those numerical results compare well with X-ray spectroscopic measurements performed at the PALS laser facility.

Published
2013
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