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4 results on '"Pelka, Alexander"'

2. Visualizing plasmons and ultrafast kinetic instabilities in laser-driven solids using X-ray scattering

Author

Ordyna, Paweł, Bähtz, Carsten, Brambrink, Erik, Bussmann, Michael, Laso Garcia, Alejandro, Garten, Marco, Gaus, Lennart, Göde, Sebastian, Grenzer, Jörg, Gutt, Christian, Höppner, Hauke, Huang, Lingen, Hübner, Uwe, Humphries, Oliver, Marré, Brian Edward, Metzkes-Ng, Josefine, Miethlinger, Thomas, Nakatsutsumi, Motoaki, Öztürk, Özgül, Pan, Xiayun, Paschke-Brühl, Franziska, Pelka, Alexander, Prencipe, Irene, Preston, Thomas R., Randolph, Lisa, Schlenvoigt, Hans-Peter, Schwinkendorf, Jan-Patrick, Šmíd, Michal, Starke, Sebastian, Štefaníková, Radka, Thiessenhusen, Erik, Toncian, Toma, Zeil, Karl, Schramm, Ulrich, Cowan, Thomas E., and Kluge, Thomas

Published
2024
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3. (Sub-)Picosecond Surface Correlations of Femtosecond Laser Excited Al-Coated Multilayers Observed by Grazing-Incidence X-ray Scattering.

Author

Randolph, Lisa, Banjafar, Mohammadreza, Yabuuchi, Toshinori, Baehtz, Carsten, Bussmann, Michael, Dover, Nicholas P., Huang, Lingen, Inubushi, Yuichi, Jakob, Gerhard, Kläui, Mathias, Ksenzov, Dmitriy, Makita, Mikako, Miyanishi, Kohei, Nishiuchi, Mamiko, Öztürk, Özgül, Paulus, Michael, Pelka, Alexander, Preston, Thomas R., Schwinkendorf, Jan-Patrick, and Sueda, Keiichi

Subjects
FEMTOSECOND pulses, X-ray scattering, ULTRASHORT laser pulses, FEMTOSECOND lasers, SMALL-angle X-ray scattering, SURFACE dynamics, MULTILAYERS, SURFACE morphology
Abstract

Femtosecond high-intensity laser pulses at intensities surpassing 1014 W/cm2 can generate a diverse range of functional surface nanostructures. Achieving precise control over the production of these functional structures necessitates a thorough understanding of the surface morphology dynamics with nanometer-scale spatial resolution and picosecond-scale temporal resolution. In this study, we show that single XFEL pulses can elucidate structural changes on surfaces induced by laser-generated plasmas using grazing-incidence small-angle X-ray scattering (GISAXS). Using aluminium-coated multilayer samples we distinguish between sub-picosecond (ps) surface morphology dynamics and subsequent multi-ps subsurface density dynamics with nanometer-depth sensitivity. The observed subsurface density dynamics serve to validate advanced simulation models representing matter under extreme conditions. Our findings promise to open new avenues for laser material-nanoprocessing and high-energy-density science. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Developed turbulence and nonlinear amplification of magnetic fields in laboratory and astrophysical plasmas

Author

Meinecke, Jena, Tzeferacos, Petros, Bell, Anthony, Bingham, Robert, Clarke, Robert, Churazov, Eugene, Crowston, Robert, Doyle, Hugo, Drake, R. Paul, Heathcote, Robert, Koenig, Michel, Kuramitsu, Yasuhiro, Kuranz, Carolyn, Lee, Dongwook, MacDonald, Michael, Murphy, Christopher, Notley, Margaret, Park, Hye-Sook, Pelka, Alexander, Ravasio, Alessandra, Reville, Brian, Sakawa, Youichi, Wan, Willow, Woolsey, Nigel, Yurchak, Roman, Miniati, Francesco, Schekochihin, Alexander, Lamb, Don, and Gregori, Gianluca

Published
2015

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