A5072384158- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Advanced X-ray Imaging Techniques
- High-pressure geophysics and materials
- Atomic and Molecular Physics
- Laser Design and Applications
- Plasma Diagnostics and Applications
- Optical Systems and Laser Technology
- Visual perception and processing mechanisms
- Ocular and Laser Science Research
- Atrial Fibrillation Management and Outcomes
- Cardiac Arrhythmias and Treatments
- Advanced Surface Polishing Techniques
- Neural and Behavioral Psychology Studies
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Advanced Optical Sensing Technologies
- Ionosphere and magnetosphere dynamics
- Antiplatelet Therapy and Cardiovascular Diseases
- Plasma Applications and Diagnostics
- Integrated Circuits and Semiconductor Failure Analysis
- Laser-Matter Interactions and Applications
Charles University
2012-2024
Czech Academy of Sciences
2022-2024
Czech Academy of Sciences, Institute of Plasma Physics
2021-2024
Czech Academy of Sciences, Institute of Physics
2022-2024
Czech Technical University in Prague
2021
Michigan State University
2011
Friedrich-Alexander-Universität Erlangen-Nürnberg
1998
AimsSurgical ablation procedure can restore sinus rhythm (SR) in patients with atrial fibrillation (AF) undergoing cardiac surgery. However, it is not known whether has any impact on long-term clinical outcomes.
This paper describes design, development, and implementation of a multi-channel magnetic electron spectrometer for the application in laser–plasma interaction experiments carried out at Prague Asterix Laser System. Modular design allows setup variable configurations to evaluate angular distribution hot emission. The array configuration spectrometers consists 16 channels mounted around target. modules incorporate plastic collimator designed suppress secondary radiation by absorbing wide angle...
Abstract Experimental and theoretical study of plasma processes affected by strong laser generated magnetic fields is reported. The PALS system operating at 3ω (438.5 nm) delivered intensities up to 1×10 16 W/cm 2 on targets. By using a special target consisting Cu foil connected sub-mm coil, the level 10 T were generated. This 1.4 times higher than field with 1.315 μm (1ω) beam comparable intensity. We found that these sufficiently modify blow-off from which resulted in changed expansion...
Methods of ablation imprints in solid targets are widely used to characterize focused X-ray laser beams due a remarkable dynamic range and resolving power. A detailed description intense beam profiles is especially important high-energy-density physics aiming at nonlinear phenomena. Complex interaction experiments require an enormous number be created under all desired conditions making the analysis demanding requiring huge amount human work. Here, for first time, we present imprinting...
Abstract Optical generators of strong magnetic fields based on the laser-driven-coil target concept are considered to be useful tools for studies magnetized plasmas in particular, study implosion fusion targets inertial research and astrophysical applications. This paper presents results directed at an investigation plasma properties a laser-induced field. In experiment carried out kilojoule PALS laser facility, generator field was disc-coil (DC) composed Cu disk coupled single-turn coil...
Abstract Magnetized plasma studies are necessary for many applied studies, including laser-driven inertial fusion, modeling astrophysically relevant phenomena, and innovative industrial medical applications. An interesting method of generating highly magnetized can be based on the interaction a laser with spiral-shaped cavity (snail-like) targets. A target shaped in this way represent central area spherical pellet that is not irradiated radially, but rather through an entrance hole allowing...
We report on an experiment performed at the FLASH2 free-electron laser (FEL) aimed producing warm dense matter via soft x-ray isochoric heating. In experiment, we focus study of ions emitted during ablation process using time-of-flight electron multipliers and a shifted Maxwell–Boltzmann velocity distribution model. find that most are thermal, but some impurities chemisorbed target surface, such as protons, accelerated by electrostatic field created in plasma escaped electrons. The...
When given a cue about the color of search target people can use top-down control to constrain their and eye movements only objects (Williams, 1967). Here we investigate whether simultaneously bias attention that were defined as having either one two distinct colors. Participants searched for leftward facing C among display 24 Landolt Cs while monitored movements. Each was colored red, yellow, green or blue. In critical block trials, participants told target, if present, would be red OR...
Extreme ultraviolet (EUV) photon beam characterization techniques, Hartmann wavefront sensing and single shot ablation imprinting, were compared along the caustic of a tightly focused free-electron laser (FEL) at beamline FL24 FLASH2, Free-electron LASer in Hamburg DESY. The transverse coherence EUV FEL was determined by Young's double pinhole experiment used back-propagation algorithm which includes partial to calculate intensity profiles from measurements. A very good agreement profile...
Xray free-electron lasers (XFELs) enable experiments that would have been impractical or impossible at conventional X-ray laser facilities. Indeed, more XFEL facilities are being built and planned, with their aim to deliver larger pulse energies higher peak brilliance. While seeking increase the power, it is quintessential consider maximum fluence a grazing-incidence FEL mirror can withstand. To address this issue, several studies were conducted on damage by soft pulses European facility....
The interaction of supersonic laser-generated plasma jets with a secondary gas target was studied experimentally. parameters the jet, and resulting shock, were characterized using combination multi-frame interferometry/shadowgraphy, X-ray diagnostics, allowing for detailed study their structure evolution. velocity obtained an streak camera, filtered pinhole imaging used to infer electron temperature jet shock. topology ambient density found have significant effect on shock formation, as well...
A proper spatial characterization of a laser beam profile is indisputably important for any laser-mater experiment as well protection beamline optical elements. Method ablation and desorption imprints provides thorough analysis applicable to broad range photon energies. This method, however, often requires up thousands shots which must be then manually analyzed. Here we present method based on deep learning image segmentation model able substitute human element currently indispensable in...
We report on ion emission from plasma produced thick targets irradiated with nanosecond and femtosecond pulses delivered by mid-ultraviolet soft x-ray lasers, respectively. To distinguish between different acceleration mechanisms, the maximum kinetic energy of ions under interaction conditions is plotted versus laser fluence. The transformation time-of-flight detector signal into charge density distance-of-flight spectra makes it possible to determine mean fastest groups based influence...
The ablation imprints method is a well-established approach to thoroughly characterising fluence distributions [J/cm2] of focused short-wavelength free-electron laser beams. For visible and near-infrared beams, distribution the beam can also be measured by other means, for example, projecting magnified image focal spot onto camera. We studied viability in spectral range compared it above-mentioned conventional approach. Furthermore, we effects X-ray, visible, radiation on damage....
Abstract The influence of a transverse magnetic field on the formation and evolution supersonic plasma jets shocks was studied experimentally, compared with 3D numerical simulations. An improved jet collimation seen due to change in topology restricting radial expansion ablated plasma. also shown strongly affect shock structures, both indirectly through modified geometry, as well compression lines region. interaction characteristics were found depend relative contribution pressure balancing ram jet.