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171 results on '"Dudzak, R."'

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. Laser-driven ion and electron acceleration from near-critical density gas targets: towards high-repetition rate operation in the 1 PW, sub-100 fs laser interaction regime

Author

Ospina-Bohórquez, V., Salgado-López, C., Ehret, M., Malko, S., Salvadori, M., Pisarczyk, T., Chodukowski, T., Rusiniak, Z., Krupka, M., Lendrin, P. GuillonM., Pérez-Callejo, G., Vlachos, C., Hannachi, F., Tarisien, M., Consoli, F., Verona, C., Prestopino, G., Dostal, J., Dudzak, R., Henares, J. L., Apiñaniz, J. I., DeLuis, D., Debayle, A., Caron, J., Ceccotti, T., Hernández-Martín, R., Hernández-Toro, J., Huault, M., Martín-López, A., Méndez, C., Nguyen-Bui, T. -H., Perez-Hernández, J. A., Vaisseau, X., Varela, O., Volpe, L., Gremillet, L., and Santos, J. J.

Subjects
Physics - Plasma Physics, Physics - Applied Physics
Abstract

Ion acceleration from gaseous targets driven by relativistic-intensity lasers was demonstrated as early as the late 90s, yet most of the experiments conducted to date have involved picosecond-duration, Nd:glass lasers operating at low repetition rate. Here, we present measurements on the interaction of ultraintense ($\sim 10^{20}\,\rm W\,cm^{-2}$, 1 PW), ultrashort ($\sim 70\,\rm fs$) Ti:Sa laser pulses with near-critical ($\sim 10^{20}\,\rm cm^{-3}$) helium gas jets, a debris-free targetry compatible with high ($\sim 1\,\rm Hz$) repetition rate operation. We provide evidence of $\alpha$ particles being forward accelerated up to $\sim 2.7\,\rm MeV$ energy with a total flux of $\sim 10^{11}\,\rm sr^{-1}$ as integrated over $>0.1 \,\rm MeV$ energies and detected within a $0.5\,\rm mrad$ solid angle. We also report on on-axis emission of relativistic electrons with an exponentially decaying spectrum characterized by a $\sim 10\,\rm MeV$ slope, i.e., five times larger than the standard ponderomotive scaling. The total charge of these electrons with energy above 2 MeV is estimated to be of $\sim 1 \,\rm nC$, corresponding to $\sim 0.1\,\%$ of the laser drive energy. In addition, we observe the formation of a plasma channel, extending longitudinally across the gas density maximum and expanding radially with time. These results are well captured by large-scale particle-in-cell simulations, which reveal that the detected fast ions most likely originate from reflection off the rapidly expanding channel walls. The latter process is predicted to yield ion energies in the MeV range, which compare well with the measurements. Finally, direct laser acceleration is shown to be the dominant mechanism behind the observed electron energization.

Published
2023

3. Experimental study of the interaction of two laser-driven radiative shocks at the PALS laser

Author

Singh, R. L., Stehle, C., Suzuki-Vidal, F., Kozlova, M., Larour, J., Chaulagain, U., Clayson, T., Rodriguez, R., Gil, J. M., Nejdl, J., Krus, M., Dostal, J., Dudzak, R., Barroso, P., Acef, O., Cotelo, M., and Velarde, P.

Subjects
Physics - Plasma Physics
Abstract

Radiative shocks (RS) are complex phenomena which are ubiquitous in astrophysical environments. The study of such hypersonic shocks in the laboratory, under controlled conditions, is of primary interest to understand the physics at play and also to check the ability of numerical simulations to reproduce the experimental results. In this context, we conducted, at the Prague Asterix Laser System facility (PALS), the first experiments dedicated to the study of two counter-propagating radiative shocks propagating at non-equal speeds up to 25-50 km/s in noble gases at pressures ranging between 0.1 and 0.6 bar. These experiments highlighted the interaction between the two radiative precursors. This interaction is qualitatively but not quantitatively described by 1D simulations. Preliminary results obtained with XUV spectroscopy leading to the estimation of shock temperature and ion charge of the plasma are also presented.

Published
2022
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5. Complex interferometry of magnetized plasma: accuracy and limitations

Author

Kochetkov, Iu., Pisarczyk, T., Kalal, M., Chodukowski, T., Zaras-Szydlowska, A., Rusiniak, Z., Dudzak, R., Dostal, J., Krupka, M., and Korneev, Ph.

Subjects
Physics - Plasma Physics, Physics - Data Analysis, Statistics and Probability, Physics - Instrumentation and Detectors, Physics - Optics
Abstract

Expanding laser plasmas, produced by high energy laser radiation, possess both high thermal and magnetic field energy density. Characterization of such plasma is challenging but needed for understanding of its physical behaviour. Among all standard experimental techniques for plasma diagnostics, classical interferometry is one of the most convenient, informative and accurate. Attempts to extract more information from each single laser shot have led to development of complex interferometry, which under certain processing allows to reconstruct both plasma electron density and magnetic field strength distributions using just one data object. However, the increase in complexity and universality of the diagnostics requires a more detailed analysis of the extracted values and their accuracy.This work focuses on axisymmetric interaction geometry. We present general analysis, starting from the basic principles and trace main error sources, finally ending up with plasma density and magnetic field distributions with the derived error bars. Use of synthetic profiles makes the analysis universal, though we present an example with real experimental data in the Appendix., Comment: 24 pages, 28 figures

Published
2021
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6. Radiative characterization of supersonic jets and shocks in a laser-plasma experiment

Author

Bohlin, H, Brack, F-E, Cervenak, M, Chodukowski, T, Cikhardt, J, Dostál, J, Dudžák, R, Hubner, J., Huo, W, Jelinek, S, Klír, D, Kroll, F, Krupka, M, Krůs, M, Pisarczyk, T, Rusiniak, Z, Schlegel, T, Schramm, U., Nguyen-Bui, T-H, Weber, S, Zaraś-Szydłowska, A, Zeil, K, Kumar, D, and Tikhonchuk, V

Subjects
Physics - Plasma Physics
Abstract

The interaction of supersonic laser-generated plasma jets with a secondary gas target was studied experimentally. The plasma parameters of the jet, and the resulting shock, were characterized using a combination of multi-frame interferometry/shadowgraphy, and X-ray diagnostics, allowing for a detailed study of their structure and evolution. The velocity was obtained with an X-ray streak camera, and filtered X-ray pinhole imaging was used to infer the electron temperature of the jet and shock. The topology of the ambient plasma density was found to have a significant effect on the jet and shock formation, as well as on their radiation characteristics. The experimental results were compared with radiation hydrodynamic simulations, thereby providing further insights into the underlying physical processes of the jet and shock formation and evolution.

Published
2020
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7. Identifiable Acetylene Features Predicted for Young Earth-like Exoplanets with Reducing Atmospheres undergoing Heavy Bombardment

Author

Rimmer, P. B., Ferus, M., Waldmann, I. P., Knížek, A, Kalvaitis, D., Ivanek, O., Kubelík, P., Yurchenko, S. N., Burian, T., Dostál, J., Juha, L., Dudžàk, R., Krůs, M., Tennyson, J., Civiš, S., Archibald, A. T., and Granville-Willett, A.

Subjects
Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The chemical environments of young planets are assumed to be largely influenced by impacts of bodies lingering on unstable trajectories after the dissolution of the protoplanetary disk. We explore the chemical consequences of impacts within the context of reducing planetary atmospheres dominated by carbon monoxide, methane and molecular nitrogen. A terawatt high-power laser was selected in order to simulate the airglow plasma and blast wave surrounding the impactor. The chemical results of these experiments are then applied to a theoretical atmospheric model. The impact simulation results in substantial volume mixing ratios within the reactor of 5% hydrogen cyanide (HCN), 8% acetylene (C$_2$H$_2$), 5% cyanoacetylene (HC$_3$N) and 1% ammonia (NH$_3$). These yields are combined with estimated impact rates for the Early Earth to predict surface boundary conditions for an atmospheric model. We show that impacts might have served as sources of energy that would have led to steady-state surface quantities of 0.4% C$_2$H$_2$, 400 ppm HCN and 40 ppm NH$_3$. We provide simulated transit spectra for an Earth-like exoplanet with this reducing atmosphere during and shortly after eras of intense impacts. We predict that acetylene is as observable as other molecular features on exoplanets with reducing atmospheres that have recently gone through their own `Heavy Bombardments', with prominent features at 3.05 $\mu$m and 10.5 $\mu$m., Comment: 26 pages, 12 figures, 2 tables, accepted for publication by The Astrophysical Journal

Published
2019
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8. Laser-driven ion and electron acceleration from near-critical density gas targets: Towards high-repetition rate operation in the 1 PW, sub-100 fs laser interaction regime

Author

Ospina-Bohórquez, V., primary, Salgado-López, C., additional, Ehret, M., additional, Malko, S., additional, Salvadori, M., additional, Pisarczyk, T., additional, Chodukowski, T., additional, Rusiniak, Z., additional, Krupka, M., additional, Guillon, P., additional, Lendrin, M., additional, Pérez-Callejo, G., additional, Vlachos, C., additional, Hannachi, F., additional, Tarisien, M., additional, Consoli, F., additional, Verona, C., additional, Prestopino, G., additional, Dostal, J., additional, Dudzak, R., additional, Henares, J. L., additional, Apiñaniz, J. I., additional, De Luis, D., additional, Debayle, A., additional, Caron, J., additional, Ceccotti, T., additional, Hernández-Martín, R., additional, Hernández-Toro, J., additional, Huault, M., additional, Martín-López, A., additional, Méndez, C., additional, Nguyen-Bui, T.-H., additional, Perez-Hernández, J. A., additional, Vaisseau, X., additional, Varela, O., additional, Volpe, L., additional, Gremillet, L., additional, and Santos, J. J., additional

Published
2024
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9. 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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10. 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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11. Extended characterization of alpha particles via laser-induced p-11B fusion reaction in silicon hydrogenated boron-doped thin targets

Author

Milluzzo, G., primary, Belloni, F., additional, Petringa, G., additional, Scuderi, V., additional, Giuffrida, L., additional, Velyhan, A., additional, Verona, C., additional, Picciotto, A., additional, Rosinski, M., additional, Catalano, R., additional, Crivellari, M., additional, Dostal, J., additional, Dudzak, R., additional, Juha, L., additional, Krasa, J., additional, Krupka, M., additional, Krůs, M., additional, Lanzalone, G., additional, Leanza, R., additional, Litrico, C.G., additional, Pfeizer, M., additional, Schillaci, F., additional, Tudisco, S., additional, Margarone, D., additional, and Cirrone, G.A.P., additional

Published
2023
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13. Laser-Driven Quasi-Static Magnetic Fields for Magnetized High Energy-Density Experiments

Author

Vlachos, C., primary, Ospina-Bohorquez, V., additional, Bradford, P., additional, Pérez-Callejo, G., additional, Ehret, M., additional, Guillon, P., additional, Lendrin, M., additional, Vaisseau, X., additional, Albertazzi, B., additional, Soussan, E., additional, Koenig, M., additional, Malko, S., additional, Fedosejevs, R., additional, Kaur, C., additional, Bailly-Grandvaux, M., additional, Walsh, C. A., additional, Florido, R., additional, Suzuki-Vidal, F., additional, McGuffey, C., additional, Beg, F. N., additional, Saret, J., additional, Chodukowski, T., additional, Pisarczyk, T., additional, Rusiniak, Z., additional, Dostal, J., additional, Dudzak, R., additional, Calisti, A., additional, Ferri, S., additional, Volpe, L., additional, Gremillet, L., additional, and Santos, J.J., additional

Published
2023
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14. 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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15. 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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17. 2D MHD simulation of spontaneous magnetic fields generated during interaction of 1315.2-nm laser radiation with copper slabs at 1016 W/cm2

Author

Jach, K., primary, Pisarczyk, T., additional, Stępniewski, W., additional, Świerczyński, R., additional, Krasa, J., additional, Chodukowski, T., additional, Rusiniak, Z., additional, Zaraś-Szydłowska, A., additional, Dostal, J., additional, Dudzak, R., additional, Juha, L., additional, Kochetkov, Iu., additional, Krupka, M., additional, and Borodziuk, S., additional

Published
2021
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18. Smoothing of laser energy deposition by gas jets

Author

Batani, D., Benocci, R., Dezulian, R., Redaelli, R., Canova, F., Stabile, H., Lucchini, G., Malka, V., Faure, J., Koenig, M., Krousky, E., Masek, K., Pfeifer, M., Skala, J., Dudzak, R., Limpouch, J., Tikhoncuk, V., and Nicolai, P.

Published
2009
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20. Design of modular multi-channel electron spectrometers for application in laser matter interaction experiments at Prague Asterix Laser System

Author

Krupka, M., primary, Singh, S., additional, Pisarczyk, T., additional, Dostal, J., additional, Kalal, M., additional, Krasa, J., additional, Dudzak, R., additional, Burian, T., additional, Jelinek, S., additional, Chodukowski, T., additional, Rusiniak, Z., additional, Krus, M., additional, and Juha, L., additional

Published
2021
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21. Shock dynamics and shock collision in foam layered targets

Author

Batani, K., primary, Aliverdiev, A., additional, Benocci, R., additional, Dezulian, R., additional, Amirova, A., additional, Krousky, E., additional, Pfeifer, M., additional, Skala, J., additional, Dudzak, R., additional, Nazarov, W., additional, and Batani, D., additional

Published
2021
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22. 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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24. 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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26. Neutron production in cavity pressure acceleration of plasma objects

Author

Chodukowski, T., primary, Borodziuk, S., additional, Rusiniak, Z., additional, Cikhardt, J., additional, Jach, K., additional, Krasa, J., additional, Rosinski, M., additional, Terwinska, D., additional, Dudzak, R., additional, Pisarczyk, T., additional, Swierczynski, R., additional, Burian, T., additional, Tchorz, P., additional, Dostal, J., additional, Szymanski, M., additional, Pfeifer, M., additional, Skala, J., additional, Singh, S., additional, Krupka, M., additional, and Krus, M., additional

Published
2020
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27. 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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28. Comprehensive diagnostics of hot electron emission from plasmas produced by sub-nanosecond terawatt laser on thin foil metal targets

Author

Krupka, M., primary, Krasa, J., additional, Dudzak, R., additional, Cikhardt, J., additional, Kalal, M., additional, Burian, T., additional, Klir, D., additional, Rezac, K., additional, Dostal, J., additional, Pfeifer, M., additional, Pisarczyk, T., additional, Chodukowski, T., additional, and Rusiniak, Z., additional

Published
2019
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29. 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

30. 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

31. 2D MHD simulation of spontaneous magnetic fields generated during interaction of 1315.2-nm laser radiation with copper slabs at 1016 W/cm2.

Author

Jach, K., Pisarczyk, T., Stępniewski, W., Świerczyński, R., Krasa, J., Chodukowski, T., Rusiniak, Z., Zaraś-Szydłowska, A., Dostal, J., Dudzak, R., Juha, L., Kochetkov, Iu., Krupka, M., and Borodziuk, S.

Subjects
LASER beams, MAGNETIC fields, HIGH temperature plasmas, LASER plasmas, CONTROLLED fusion, MAGNETIC field effects, MAGNETOHYDRODYNAMIC instabilities
Abstract

Multidimensional modeling of phenomena and processes occurring during the expansion of the laser-produced plasma for different irradiation conditions related to both the laser beam parameters and the target constructions is a very complex issue, especially when modeling requires consideration of kinetic processes associated with the development of various types of microscopic instability. Multidimensional PIC codes create such a possibility, but their use is limited to modeling phenomena even in a very narrow timescale due to the limited computational capabilities of current supercomputers. For this reason, the paper attempts to interpret the results of the spontaneous magnetic field (SMF) measurements obtained during the PALS (Prague Asterix Laser System) experiment [Pisarczyk et al., AIP Adv. 10, 115201 (2020); Pisarczyk et al., Phys. Plasmas 22, 102706 (2015)] based on the 2D magneto-hydrodynamic (MHD) model [Jach et al., Computer Modeling of Dynamic Interaction of Bodies by Free Point Method (PWN, Warsaw, 2011)]. The MHD equations were used with included arbitrary (i) current of hot electrons treating it as an additional external current and (ii) ion-sound instability responsible for the increase in anomalous resistance in areas with high temperature and low-density plasma. The spatial distribution of magnetic fields and current density obtained from 2D modeling are in acceptable agreement with the experimental results [Pisarczyk et al., Plasma Phys. Controlled Fusion 62, 115020 (2020); Zaraś-Szydłowska et al., AIP Adv. 10, 115201 (2020); Pisarczyk et al., Phys. Plasmas 22, 102706 (2015)]. The inclusion of temporal changes in anomalous resistance in modeling allowed us to explain the persistence of high SMF amplitude at the level of several megagauss after the laser pulse ended due to the effect of magnetic field freezing. [ABSTRACT FROM AUTHOR]

Published
2021
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32. Elaboration of 3-frame complex interferometry for optimization studies of capacitor-coil optical magnetic field generators

Author

Pisarczyk, T., primary, Santos, J.J., additional, Dudzak, R., additional, Zaras-Szydłowska, A., additional, Ehret, M., additional, Rusiniak, Z., additional, Dostal, J., additional, Chodukowski, T., additional, Renner, O., additional, Gus'kov, S.Yu., additional, Korneev, Ph., additional, Burian, T., additional, Vlachos, Ch., additional, Kochetkov, Iu., additional, Makaruk, D., additional, Rosinski, M., additional, Kalal, M., additional, Krupka, M., additional, Pfeifer, M., additional, Klir, D., additional, Cikhardt, J., additional, Krasa, J., additional, Singh, S., additional, Borodziuk, S., additional, Krus, M., additional, Juha, L., additional, Hrebicek, J., additional, Golasowski, J., additional, and Skala, J., additional

Published
2019
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33. Laser-driven strong shocks with infrared lasers at intensity of 1016 W/cm2

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
2019
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34. Prebiotic synthesis initiated in formaldehyde by laser plasma simulating high-velocity impacts

Author

Ferus, M., primary, Pietrucci, F., additional, Saitta, A. M., additional, Ivanek, O., additional, Knizek, A., additional, Kubelík, P., additional, Krus, M., additional, Juha, L., additional, Dudzak, R., additional, Dostál, J., additional, Pastorek, A., additional, Petera, L., additional, Hrncirova, J., additional, Saeidfirozeh, H., additional, Shestivská, V., additional, Sponer, J., additional, Sponer, J. E., additional, Rimmer, P., additional, Civiš, S., additional, and Cassone, G., additional

Published
2019
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36. Time evolution of stimulated Raman scattering and two-plasmon decay at laser intensities relevant for shock ignition in a hot plasma

Author

Cristoforetti, G., primary, Antonelli, L., additional, Mancelli, D., additional, Atzeni, S., additional, Baffigi, F., additional, Barbato, F., additional, Batani, D., additional, Boutoux, G., additional, D’Amato, F., additional, Dostal, J., additional, Dudzak, R., additional, Filippov, E., additional, Gu, Y. J., additional, Juha, L., additional, Klimo, O., additional, Krus, M., additional, Malko, S., additional, Martynenko, A. S., additional, Nicolai, Ph., additional, Ospina, V., additional, Pikuz, S., additional, Renner, O., additional, Santos, J., additional, Tikhonchuk, V. T., additional, Trela, J., additional, Viciani, S., additional, Volpe, L., additional, Weber, S., additional, and Gizzi, L. A., additional

Published
2019
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37. Progress in understanding the role of hot electrons for the shock ignition approach to inertial confinement fusion

Author

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

Published
2018
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38. Wavelength dependence of laser plasma interaction related to shock ignition approach – CORRIGENDUM

Author

Pisarczyk, T., primary, Gus'kov, S.Yu., additional, Dudzak, R., additional, Renner, O., additional, Batani, D., additional, Chodukowski, T., additional, Rusiniak, Z., additional, Dostal, J., additional, Demchenko, N.N., additional, Rosinski, M., additional, Parys, P., additional, Smid, M., additional, Korneev, Ph., additional, Krousky, E., additional, Borodziuk, S., additional, Badziak, J., additional, Antonelli, L., additional, Gizzi, L.A., additional, Cristoforetti, G., additional, Koester, P., additional, Maheut, Y., additional, Volpe, L., additional, Baffigi, F., additional, Levato, T., additional, Skala, J., additional, Zaras-Szydlowska, A., additional, Trela, J., additional, Mancelli, D., additional, Ullschmied, J., additional, Pfeifer, M., additional, Juha, L., additional, Krus, M., additional, Hrebicek, J., additional, Medrik, T., additional, Jungwirth, K., additional, Krupka, M., additional, and Pisarczyk, P., additional

Published
2018
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39. About laser shocks dynamics for complex focal spots and structured targets

Author

Aliverdiev, A, Batani, D, Benocci, R, Dezulian, R, Amirova, A, Ragimkhanov, G, Krousky, E, Ullschmied, J, Skala, J, Dudzak, R, Jakubowska, K, Aliverdiev, AA, Amirova, AA, Ragimkhanov, GB, Jakubowska K, Aliverdiev, A, Batani, D, Benocci, R, Dezulian, R, Amirova, A, Ragimkhanov, G, Krousky, E, Ullschmied, J, Skala, J, Dudzak, R, Jakubowska, K, Aliverdiev, AA, Amirova, AA, Ragimkhanov, GB, and Jakubowska K

Abstract

We have analyzed the laser driven shock behavior in experiments with double focal spots, in particular, its cumulative effect in double layer foam-metal targets, explained by multiple collisions of individual shocks in the structured target. Some of experimental shock dynamics results are in a good agreement with the theoretical and numerical predictions, but others demand for new models.

Published
2018

41. Efficient acceleration of a dense plasma projectile to hyper velocities in the laser-induced cavity pressure acceleration scheme

Author

Badziak, J., primary, Krousky, E., additional, Marczak, J., additional, Parys, P., additional, Pisarczyk, T., additional, Rosiński, M., additional, Sarzynski, A., additional, Chodukowski, T., additional, Dostal, J., additional, Dudzak, R., additional, Kalinowska, Z., additional, Kucharik, M., additional, Liska, R., additional, Pfeifer, M., additional, Ullschmied, J., additional, and Zaraś-Szydłowska, A., additional

Published
2018
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43. Measurements of parametric instabilities at laser intensities relevant to strong shock generation

Author

Cristoforetti, G., primary, Antonelli, L., additional, Atzeni, S., additional, Baffigi, F., additional, Barbato, F., additional, Batani, D., additional, Boutoux, G., additional, Colaitis, A., additional, Dostal, J., additional, Dudzak, R., additional, Juha, L., additional, Koester, P., additional, Marocchino, A., additional, Mancelli, D., additional, Nicolai, Ph., additional, Renner, O., additional, Santos, J. J., additional, Schiavi, A., additional, Skoric, M. M., additional, Smid, M., additional, Straka, P., additional, and Gizzi, L. A., additional

Published
2018
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44. Experimental observation of parametric instabilities at laser intensities relevant for shock ignition

Author

Cristoforetti, G., Colaitis, A., Antonelli, L., Atzeni, S., Baffigi, F., Batani, D., Barbato, F., Boutoux, G., Dudzak, R., Koester, P., Krousky, E., Labate, L., Nicolai, Ph., Renner, O., Škorić, Miloš M., Tikhonchuk, V., Gizzi, L. A., Cristoforetti, G., Colaitis, A., Antonelli, L., Atzeni, S., Baffigi, F., Batani, D., Barbato, F., Boutoux, G., Dudzak, R., Koester, P., Krousky, E., Labate, L., Nicolai, Ph., Renner, O., Škorić, Miloš M., Tikhonchuk, V., and Gizzi, L. A.

Abstract

We report measurements of parametric instabilities and hot electron generation in a laser intensity regime up to 6 x 10(15) W/cm(2), typical of the shock ignition approach to inertial fusion. Experiments performed at the PALS laboratory in Prague show that the incident laser energy losses are dominated by Stimulated Brillouin Scattering (SBS) rather than by Stimulated Raman Scattering (SRS) or Two-Plasmon Decay (TPD). Results are compared to hydrodynamics simulations using a code that includes self-consistent calculations of non-linear laser plasma interactions and accounts for the laser intensity statistics contained in the beam speckles. Good agreement is found for the backscattered SRS light, and for temperature and flux of hot electrons. The effect of high-intensity speckles on backscattered SRS is also underlined numerically and experimentally. Copyright (C) EPLA, 2017

Published
2017

45. Experimental study of counter propagating radiative shocks

Author

Singh, Raj Laxmi, Stehlé, Chantal, Suzuki-Vidal, Francisco, Kozlová, Michaela, Larour, Jean, Chaulagain, Uddhab, Clayson, Thomas, Nejdl, Jaroslav, Krus, Miroslav, Dostál, Jan, Dudzak, R., Barroso, Patrice, Acef, Ouali, Cotelo, M., Rodriguez, R., Gil, J. M., Laboratoire de Physique des Plasmas (LPP), Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

International audience; S 04 Atelier général PNPS Radiative shocks are present at different stages of stellar evolution, for instance in the stellar infancy when matter is accreted from the stellar disk to the photosphere of the young star and is also ejected in the form of stellar jets, up to the final stages as supernovae and the interaction of their remnants with the interstellar medium. Such shocks are strongly influenced by the radiation through its coupling with hydrodynamics. Thus their topology and dynamics are quite complex. Generating such hypersonic shocks in the laboratory, with controlled conditions, is thus an adequate tool to study the influence of radiation and to compare them with numerical simulations. So far, such laboratory astrophysics studies are performed on large-scale laser facilities, addressing hydrodynamic radiative shocks, in Xenon with very high velocity (50 - 150 km/s) and moderate pressure (0.1 - 1 bar). These experiments advance the understanding of the effect of radiation on the different shock components (radiative precursors, shock collapse, walls heating etc.). In continuation of these laboratory experiments, we recently performed experiments at PALS laser facility to study a fairly new topic focusing on the interaction of two counter propagating shocks. The objective is to understand the influence of one radiative precursor onto another, to achieve higher temperature in the compressed medium. In the astrophysical context, aforementioned studies are relevant for instance, collision of supernovae remnants and more indirectly the interaction of supernovae remnants with dense molecular clouds and the impact of accretion flows on a stellar atmosphere. The experiments have been able to launch shocks with different shock speeds (~30-55 km/s and 10-25 km/s), in varying gases (Ar, Xe) and pressures (~0.1-0.3 bar). Optical interferometry allowed us to estimate several physical parameters such as shock speed and electron density in the precursor, XUV spectroscopy allowed to give information about the shock temperature. We will present some preliminary results together with numerical simulations.

Published
2016

46. Ist die routinemäßige Skelettszintigraphie in der Nachsorge des Mammakarzinoms gerechtfertigt?

Author

Dudzak R, Gabl F, Lenzhofer R, Pirich K, and Schuster R

Subjects
medicine.medical_specialty, business.industry, Retrospective cohort study, Skeletal scanning, General Medicine, medicine.disease, Gastroenterology, Bone scanning, Breast cancer, Internal medicine, medicine, Carcinoma, Alkaline phosphatase, Radiology, medicine.symptom, business, Bone pain, Statistical correlation
Abstract

In a retrospective study of 254 women with carcinoma of the breast (mean age 55.4 years) the occurrence of bone pain was compared with results of skeletal scanning, skeletal X-ray examinations and routine biochemical findings. Typical signs of skeletal metastases were found in bone scans of 119 patients, 88 (74%) of whom had bone pain. Alkaline phosphatase was elevated in 54 (45%), LDH in 32 (27%), and gamma-GT in 69 patients (58%). There was a statistical correlation between the number of affected skeletal parts and the absolute level of alkaline phosphatase (P less than 0.001) and of LDH (P less than 0.05). Skeletal scans gave no evidence of bone metastases in 36 patients who had bone pains. In this group of patients alkaline phosphatase was elevated in 4, LDH in 1 and gamma-GT in 12 patients. Routine scanning of 254 patients revealed skeletal metastases in 12% without any clinical symptoms. Bone pain and (or) increased activity of alkaline phosphatase occurred in 91% of patients with skeletal metastases. In our view, bone scan in the postoperative control of breast cancer is justified only after onset of clinical symptoms and (or) if there is an abnormally raised alkaline phosphatase activity.

Published
2008

48. Efficient production and diagnostics of MeV proton beams from a cryogenic hydrogen ribbon

Author

Velyhan, A., primary, Giuffrida, L., additional, Scuderi, V., additional, Perin, J.P., additional, Chatain, D., additional, Garcia, S., additional, Bonnay, P., additional, Dostal, J., additional, Ullschmied, J., additional, Dudzak, R., additional, Krousky, E., additional, Cykhardt, J., additional, Prokupek, J., additional, Pfeifer, M., additional, Rosinski, M., additional, Krasa, J., additional, Brabcova, K., additional, Napoli, M. De, additional, Lastovicka, T., additional, and Margarone, D., additional

Published
2017
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49. Synchronizing single-shot high-energy iodine photodissociation laser PALS and high-repetition-rate femtosecond Ti:sapphire laser system

Author

Dostal, J., primary, Dudzak, R., additional, Pisarczyk, T., additional, Pfeifer, M., additional, Huynh, J., additional, Chodukowski, T., additional, Kalinowska, Z., additional, Krousky, E., additional, Skala, J., additional, Hrebicek, J., additional, Medrik, T., additional, Golasowski, J., additional, Juha, L., additional, and Ullschmied, J., additional

Published
2017
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50. Experimental observation of parametric instabilities at laser intensities relevant for shock ignition

Author

Cristoforetti, G., primary, Colaïtis, A., additional, Antonelli, L., additional, Atzeni, S., additional, Baffigi, F., additional, Batani, D., additional, Barbato, F., additional, Boutoux, G., additional, Dudzak, R., additional, Koester, P., additional, Krousky, E., additional, Labate, L., additional, Nicolaï, Ph., additional, Renner, O., additional, Skoric, M., additional, Tikhonchuk, V., additional, and Gizzi, L. A., additional

Published
2017
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