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25 results on '"Nevrkla, Michal"'

1. Laser and pinching discharge plasmas spectral characteristics in water window region 2

Author

Kolar, Petr, Vrbova, Miroslava, Nevrkla, Michal, Vrba, Pavel, and Jancarek, Alexandr

Subjects
Physics - Plasma Physics
Abstract

Water window emission spectra of two laboratory nitrogen plasma sources were examined with a free standing grating spectrometer (FSGS). The highest line intensities at the wavelength 2.88 nm achievable with the sources were compared. Pulse energies for this line were judged as 0.02 mJ/srad and 0.16 mJ/srad with laser produced plasma system and pinching discharge plasma, respectively. The spectral resolution was found about 0.01 nm at 3rd order of spectral lines around wavelength 2.5 nm.

Published
2011

2. Diagnostics for precise target positioning in ~10^22 W/cm2 laser-plasma experiments

Author

Vishnyakov, Evgeny, primary, Sagisaka, Akito, primary, Ogura, Koichi, primary, Pikuz, Tatiana, primary, Armstrong, C, primary, Pikuz, Sergey, primary, Gonzalez-Izquierdo, Bruno, primary, Esirkepov, Timur, primary, Yan, Wenchao, primary, Jeong, Tae Moon, primary, Singh, Sushil, primary, Hadjisolomou, Prokopis, primary, Finke, Ondřej, primary, Grittani, Gabriele Maria, primary, Nevrkla, Michal, primary, Lazzarini, Carlo Maria, primary, Velyhan, Andriy, primary, Hayakawa, Takehito, primary, Fukuda, Yuji, primary, Koga, James, primary, Ishino, Masahiko, primary, Kondo, Kotaro, primary, Miyasaka, Yasuhiro, primary, Kon, Akira, primary, Nishikino, Masaharu, primary, Nosach, Evgeny, primary, Khikhlukha, Danila, primary, Tsygvintsev, Ilia, primary, Kumar, Deepak, primary, Nejdl, Jaroslav, primary, Margarone, Daniele, primary, Sasorov, Pavel, primary, Weber, Stefan, primary, kando, masaki, primary, Kiriyama, Hiromitsu, primary, Kato, Yoshiaki, primary, Korn, Georg, primary, Kondo, Kiminori, primary, Bulanov, Sergei, primary, Kawachi, Tetsuya, primary, and Pirozhkov, Alexander, primary

Published
2023
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3. Instruments for best target position determination in the high-intensity laser-solid interaction experiment

Author

Vishnyakov, Eugene A., primary, Sagisaka, Akito, additional, Ogura, Koichi, additional, Pikuz, Tatiana A., additional, Armstrong, Chris D., additional, Pikuz, Sergey A., additional, Gonzalez-Izquierdo, Bruno, additional, Esirkepov, Timur Z., additional, Yan, Wenchao, additional, Jeong, Tae Moon, additional, Singh, Sushil, additional, Hadjisolomou, Prokopis, additional, Finke, Ondrej, additional, Grittani, Gabriele Maria, additional, Nevrkla, Michal, additional, Lazzarini, Carlo Maria, additional, Velyhan, Andriy, additional, Hayakawa, Takehito, additional, Fukuda, Yuji, additional, Koga, James K., additional, Ishino, Masahiko, additional, Kondo, Kotaro, additional, Miyasaka, Yasuhiro, additional, Kon, Akira, additional, Nishikino, Masaharu, additional, Nosach, Evgeny V., additional, Khikhlukha, Danila, additional, Tsygvintsev, Ilya P., additional, Kumar, Deepak, additional, Nejdl, Jaroslav, additional, Margarone, Daniele, additional, Sasorov, Pavel V., additional, Kando, Masaki, additional, Kiriyama, Hiromitsu, additional, Korn, Georg, additional, Kondo, Kiminori, additional, Bulanov, Sergei V., additional, Kawachi, Tetsuya, additional, and Pirozhkov, Alexander S., additional

Published
2023
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4. Multiscale modeling of HHG and its applications

Author

Vábek, Jan, primary, Finke, Ondrej, additional, Veyrinas, Kevin, additional, Valentin, Constance, additional, Němec, Tadeáš, additional, Descamps, Dominique, additional, Nevrkla, Michal, additional, Péjot, Clément, additional, Bobrova, Nadezda, additional, Burgy, Frédéric, additional, Jurkovičová, Lucie, additional, Albrecht, Martin, additional, Jancárek, Alexandr, additional, Constant, Eric, additional, Hort, Ondrej, additional, Mével, Eric, additional, Limpouch, Jiří, additional, Skupin, Stefan, additional, Nejdl, Jaroslav, additional, and Catoire, Fabrice, additional

Published
2023
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5. Multiscale modeling of HHG and its applications

Author

Vábek, Jan, Finke, Ondrej, Veyrinas, Kevin, Valentin, Constance, Němec, Tadeáš, Descamps, Dominique, Nevrkla, Michal, Péjot, Clément, Bobrova, Nadezda, Burgy, Frédéric, Jurkovič, M., Albrecht, Martin, Jancárek, Alexandr, Constant, Eric, Hort, Ondrej, Mével, Eric, Limpouch, Jiří, Skupin, Stefan, Nejdl, Jaroslav, Catoire, Fabrice, Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Czech Technical University in Prague (CTU), ELI Beamlines, Institute of Physics of the Czech Academy of Sciences (FZU / CAS), Czech Academy of Sciences [Prague] (CAS)-Czech Academy of Sciences [Prague] (CAS), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], optics-free focusing, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], XUV focusing, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], electrical discharge, multi-scale HHG, quasi-phase matching, phase-matching, high harmonic generation
Abstract

Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic; High-harmonic generation (HHG) in gaseous media is a workhorse tool in attosecond science. Its description origins from the microscopic scale of a single atom or molecule interacting with a driving IR-laser pulse. However, its practical realization usually employs a macroscopic volume of the gas. The macroscopic aspect aggregates all the microscopic emitters and brings novel physical mechanisms that drive the generation. One of the key mechanisms within the macroscopic scale is the shaping of the driving pulse due to the non-linear response of the medium. We present a comprehensive numerical model describing and coupling the physics on both scales. The model consists of different modules that provide different levels of approximation to choose an optimal trade-off between accuracy and computational cost. We then use it to address two generation schemes, where we provide a detailed picture together with experimental realizations. The first scheme uses a long medium homogeneously pre-ionized by an electrical discharge to optimize the phase-matching of the harmonic signal. This scheme allows, in particular, for optimizing HHG in long media where the control is difficult because the driving pulse undergoes strong reshaping and defocusing due to the non-linear response after the entrance to the medium. The second scheme introduces a mechanism to control the divergence of the harmonic beam in thin targets. The divergence is driven by shaping the wavefront of the driving pulse. This allows for spectrally selective focusing of the harmonic beams without the use of optics, which leads to inevitable losses in the XUV region.

Published
2023

6. Instruments for best target position determination in the high-intensity laser-solid interaction experiment

Author

Menoni, Carmen S., Nejdl, Jaroslav, Vishnyakov, Eugene A., Sagisaka, Akito, Ogura, Koichi, Pikuz, Tatiana A., Armstrong, Chris, Pikuz, Sergey A., Gonzalez-Izquierdo, Bruno, Esirkepov, Timur Zh., Yan, Wenchao, Jeong, Tae Moon, Singh, Sushil, Hadjisolomou, Prokopis, Finke, Ondrej, Grittani, Gabriele Maria, Nevrkla, Michal, Lazzarini, Carlo Maria, Velyhan, Andriy, Hayakawa, Takehito, Fukuda, Yuji, Koga, James, Ishino, Masahiko, Kondo, Kotaro, Miyasaka, Yasuhiro, Kon, Akira, Nishikino, Masaharu, Nosach, Yevhen, Khiklukha, Danila, Tsygvintsev, Ilya, Kumar, Deepak, Nejdl, Jaroslav, Margarone, Daniele, Sasorov, Pavel V., Kando, Masaki, Kiriyama, Hiromitsu, Korn, Georg, Kondo, Kiminori, Bulanov, Sergei V., Kawachi, Tetsuya, and Pirozhkov, Alexander S.

Published
2023
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8. TERESA Target Area at ELI Beamlines

Author

Tryus, Maksym, primary, Grepl, Filip, additional, Chagovets, Timofej, additional, Velyhan, Andriy, additional, Giuffrida, Lorenzo, additional, Stancek, Stanislav, additional, Kantarelou, Vasiliki, additional, Istokskaia, Valeria, additional, Schillaci, Francesco, additional, Zakova, Martina, additional, Psikal, Jan, additional, Nevrkla, Michal, additional, Lazzarini, Carlo Maria, additional, Grittani, Gabriele Maria, additional, Goncalves, Leonardo, additional, Nawaz, Muhammad Fahad, additional, Cupal, Josef, additional, Koubíkova, Lucia, additional, Buck, Samuel, additional, Weiss, Jiri, additional, Peceli, Davorin, additional, Szotkowski, Petr, additional, Majer, Karel, additional, Naylon, Jack Alexander, additional, Green, Jonathan Tyler, additional, Kramer, Daniel, additional, Rus, Bedrich, additional, Korn, Georg, additional, Levato, Tadzio, additional, and Margarone, Daniele, additional

Published
2020
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10. Experimental Study of Nanosecond Laser-Generated Plasma Channels

Author

Levato, Tadzio, primary, Nevrkla, Michal, additional, Nawaz, Muhammad Fahad, additional, Giuffrida, Lorenzo, additional, Grepl, Filip, additional, Zulic, Haris, additional, Pilar, Jan, additional, Hanus, Martin, additional, Divoky, Martin, additional, Lucianetti, Antonio, additional, Mocek, Tomas, additional, and Margarone, Daniele, additional

Published
2020
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12. HELL: High-Energy Electrons by Laser Light, a User-Oriented Experimental Platform at ELI Beamlines

Author

Levato, Tadzio, primary, Bonora, Stefano, additional, Grittani, Gabriele, additional, Lazzarini, Carlo, additional, Nawaz, Muhammad, additional, Nevrkla, Michal, additional, Villanova, Leonardo, additional, Ziano, Roberto, additional, Bassanese, Silvano, additional, Bobrova, Nadezhda, additional, Casarin, Katia, additional, Chacon-Golcher, Edwin, additional, Gu, Yanjun, additional, Khikhlukha, Danila, additional, Kramer, Daniel, additional, Lonza, Marco, additional, Margarone, Daniele, additional, Olšovcová, Veronika, additional, Rosinski, Marcin, additional, Rus, Bedrich, additional, Sasorov, Pavel, additional, Versaci, Roberto, additional, Zaraś-Szydłowska, Agnieska, additional, Bulanov, Sergei, additional, and Korn, Georg, additional

Published
2018
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13. High ionization states observed in soft x-ray spectra from plasmas of second row transition elements produced by femtosecond laser pulses

Author

Lokasani, Ragava, primary, Barte, Ellie Floyd, additional, Gavrilov, Petr, additional, Hribek, Petr, additional, Jancarek, Alexandr, additional, Kos, Domagoj, additional, Nevrkla, Michal, additional, Pina, Ladislav, additional, Higashiguchi, Takeshi, additional, O’Sullivan, Gerry, additional, and Limpouch, Jiri, additional

Published
2017
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15. Instruments for best target position determination in the high-intensity laser-solid interaction experiment.

Author

Vishnyakov, Eugene A., Sagisaka, Akito, Ogura, Koichi, Pikuz, Tatiana A., Armstrong, Chris, Pikuz, Sergey A., Gonzalez-Izquierdo, Bruno, Esirkepov, Timur Zh., Yan, Wenchao, Jeong, Tae Moon, Singh, Sushil, Hadjisolomou, Prokopis, Finke, Ondrej, Grittani, Gabriele Maria, Nevrkla, Michal, Lazzarini, Carlo Maria, Velyhan, Andriy, Hayakawa, Takehito, Fukuda, Yuji, and Koga, James

Published
2023
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25. Time-resolved XUV radiation diagnostics from nitrogen discharge Z-pinch plasma

Author

Nevrkla, Michal, Jancarek, Alexandr, Hübner, Jakub, Sheftman, Danny, Pina, Ladislav, Vrba, Pavel, and Vrbova, Miroslava

Abstract

XUV radiation from nitrogen filled capillary discharge plasma was diagnosed using a 104grooves/mm SiNx free-standing transmission grating. The resolution bandwidth of 0.3 nm was achieved. Time dependence of 13.4 nm line emitted power was recorded by photomultiplier in order to verify inherence of resonant radiation emission corresponding to NVII 2-3 laser transition. An increase of emitted power is expected during the pinch decay caused by recombination processes. We report here results obtained with 90 mm long capillary discharge supplied by a current pulse with maximum amplitude of 50kA and quarter-period of 80 ns. This high-current pulse was generated by a 1.5 ohm water line high-voltage generator which is used for underwater wire explosion experiments and which was adjusted for capillary discharge design using results of PSPICE simulations. Initial nitrogen pressures were varied in the range of 20 ÷ 500 Pa. MHD and kinetic simulations of the discharge plasma were performed and compared with experimental data. Simulations were performed with presumption of wall ablation. The capillary wall and electrodes material emission lines were also identified in measured spectra.

Published
2011
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