A5040562878- Radiation Detection and Scintillator Technologies
- Advanced X-ray Imaging Techniques
- Luminescence Properties of Advanced Materials
- Laser-Plasma Interactions and Diagnostics
- Atomic and Subatomic Physics Research
- X-ray Spectroscopy and Fluorescence Analysis
- Laser-Matter Interactions and Applications
- Advanced Electron Microscopy Techniques and Applications
- Atomic and Molecular Physics
- Laser-induced spectroscopy and plasma
- Advanced X-ray and CT Imaging
- Advancements in Photolithography Techniques
- Economic and Fiscal Studies
- Solid State Laser Technologies
- Radiation Dose and Imaging
- Perovskite Materials and Applications
- Mass Spectrometry Techniques and Applications
- Working Capital and Financial Performance
- Ga2O3 and related materials
- Nuclear Physics and Applications
- Traumatic Ocular and Foreign Body Injuries
- Plasma Diagnostics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Medical Imaging Techniques and Applications
- Crystallography and Radiation Phenomena
Czech Technical University in Prague
2015-2025
Extreme Light Infrastructure Beamlines
2025
Oblastní nemocnice Kladno
2019
Near-infrared (NIR)-emitting scintillators, coupled with high quantum efficiency silicon-based photodetectors, have emerged as a promising solution for highly efficient radiation detection applications. However, the study of NIR-emitting scintillators and their associated luminescence mechanism is still limited. In this work, we developed zero-dimensional Cs4EuBr6 halide via Sm2+ doping. Single crystals varying concentrations were grown by vertical Bridgman method. Under X-ray irradiation,...
In this work, experimentally measured characteristics of a kilohertz laser-driven Cu plasma X-ray source that was recently commissioned at the ELI Beamlines facility are reported. The can be driven either by an in-house developed high-contrast sub-20 fs near-infrared terawatt laser based on optical parametric chirped-pulse amplification technology or more conventional Ti:sapphire delivering 12 mJ and 45 pulses. parameters obtained with two driving lasers compared. A photon flux order up to...
The role and effect of stable Ce <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4+</sup> centers in Ce-doped LuAG single crystal scintillator is further studied by means measurements several optical, luminescence scintillation characteristics. Two LuAG:Ce samples are compared: one them the dominating xmlns:xlink="http://www.w3.org/1999/xlink">4 +</sup> center stabilized high concentration Mg xmlns:xlink="http://www.w3.org/1999/xlink">2+</sup>...
Summary We report on a very compact desk‐top transmission extreme ultraviolet (EUV) microscope based laser‐plasma source with double stream gas‐puff target, capable of acquiring magnified images objects spatial (half‐pitch) resolution sub‐50 nm. A multilayer ellipsoidal condenser is used to focus and spectrally narrow the radiation from plasma, producing quasi‐monochromatic EUV (λ = 13.8 nm) illuminating object, whereas Fresnel zone plate objective forms image. Design details, development,...
Six Mg co-doped Lu3Al5O12:Ce scintillating films were prepared by a liquid phase epitaxy method, having concentration of 0–3000 ppm. The following luminescence and scintillation characteristics their dependence on studied: photoluminescence emission excitation spectra, radioluminescence decay curves, light yield, energy resolution, afterglow. Light yield increases with until 700 ppm becomes 15–20% higher than in the Mg-free sample. Further increase leads to decrease. Scintillation is getting...
We present our recent results, related to nanoscale imaging in the extreme ultraviolet (EUV) and soft X-ray (SXR) spectral ranges demonstrate three novel systems recently developed for purpose of obtaining high spatial resolution images objects with EUV SXR radiations. All are based on laser-plasma sources, employing a double stream gas puff target. The full field microscopes—operating at 13.8 nm 2.88 wavelengths, respectively—are currently capable nanostructures sub-50 relatively short...
The development and demonstration of a table-top transmission soft X-ray (SXR) microscope, using laboratory incoherent capillary discharge source has been carried out. This Z-pinching water-window SXR source, is first its kind to be used for high spatial resolution microscopy at λ = 2.88 nm (430 eV) . A grazing incidence ellipsoidal condenser mirror focusing the radiation sample plane. Fresnel zone plate objective lens imaging onto back-illuminated (BI) CCD camera. achieved half-pitch...
Abstract We report a breakthrough concept for bulk single crystal as heavy aluminum perovskite scintillator, where due to bandgap engineering by balanced Gd admixture in Lu cation sublattice, the scintillation performance dramatically increases. In an optimized composition of (Lu, Gd)AlO 3 :Ce (LuGdAP:Ce), light yield approaches 21,000 phot/MeV, which is close that classical but much less dense YAP:Ce and 50% higher than best LuYAP:Ce reported literature. Moreover, contrary LuYAP:Ce, LuGdAP...
The performance of cerium-doped Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (Ce<sup>3+</sup>:YAG) often depends on cerium solubility achievable in a particular preparation technology.
The indirect photochemical synthesis for the preparation of bandgap- or defect-engineered multicomponent garnet powders from aqueous solutions was investigated. Gd <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> (Ga,Al) xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> (GGAG) doped with Ce + Eu and Lu (Al,Sb) were produced by calcination prepared solid precursors at various...
We present a design of compact transmission water-window microscope based on the Z-pinching capillary discharge nitrogen plasma source. The operates at wavelength 2.88 nm (430 eV), and with its table-top dimensions provides an alternative to large-scale soft X-ray (SXR) systems synchrotrons free-electron lasers. emitted radiation is filtered by titanium foil focused ellipsoidal condenser mirror into sample plane. A Fresnel zone plate was used create image onto charge-coupled device (CCD)...
Time-integrated spectra and time-resolved (20 ns resolution) of nitrogen discharge plasma radiation were recorded analyzed. Plasma was created by a 70 kA, 29 rise-time current pulse flowing through 5 mm inner diameter, 224 long capillary filled with to initial pressure ∼0.1 ÷ 1 kPa. Spectra captured in the wavelength range 8.3 14 nm. This spectral region contains Balmer series lines including potentially lasing NVII 2 – 3 transition<sup>1</sup>. Spectral identified using NIST database...
Experimentally measured characteristics of a kHz laser-driven Cu plasma X-ray source that was recently commissioned at ELI Beamlines facility are reported. The can be driven either by an in-house developed high contrast sub-20 fs near-infrared TW laser based on optical parametric chirped-pulse amplification technology, or more conventional Ti:sapphire delivering 12 mJ, 45 pulses. parameters obtained with the two driving lasers compared. Measured photon flux order up to 10^{12} K{\alpha}...
The ELI Beamlines facility advances laser-driven sources of high-flux, coherent XUV and X-ray pulses. Key developments include precisely tunable high-order harmonics advanced based on relativistic laser-matter interaction, employing both under-critical over-dense plasmas.
Laser plasma created in a krypton gas puff target is studied as source of radiation the water window spectral range (λ = 2.3–4.4 nm). The spatial development induced by sub-nanosecond Nd:YAG laser pulse focused on modeled using 2d RMHD code Z*. It shown that quickly heated and critical electron density achieved at very beginning pulse. Space-time distributions quantities, namely, temperature, density, mass expansion velocity were evaluated. Furthermore, temporal dependences temperature...
A Laser-Driven Plasma X-ray Source (LPXS) can provide intense, hard X-rays in femtosecond pulses emitted from a micrometer-size spot on recirculating liquid-metal target. Unlike tubes based electron beams, which are subject to constraints of the optics and space-charge effects, there is no fundamental limit amount laser power that be concentrated into micrometer focus. With increasing availability industrial picosecond systems it now practical offer high average flux, combined with far...
Foreign bodies are found in as many 15% of traumatic wounds. Point Care ultrasound (POCUS) is now considered reliable for detecting FBs Unfortunately, up to 38% these initially missed, resulting infections, delayed wound healing, and loss function. Microfocus X-ray imaging (MFXI) has a significantly higher resolution (up 100×) than conventional imaging. Therefore, it can potentially be used diagnostics. Up seven glass fragments smaller 2.5 mm were embedded each the 58 chicken wings thighs....
In this work we present experimental, compact desk-top SXR microscope, the EUV microscope which is at stage a technology demonstrator, and finally, contact microscope. The systems are based on laser-plasma sources, employing double stream gas puff target. full field microscopes, operating 13.8 nm 2.88 wavelengths, respectively, capable of imaging nanostructures with sub-50 spatial resolution relatively short (seconds) exposure times. operates in "water-window" spectral range, to produce an...