A5106497565- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Acoustic Wave Resonator Technologies
- Calibration and Measurement Techniques
- Ferroelectric and Piezoelectric Materials
- Spectroscopy and Quantum Chemical Studies
- Advanced Chemical Physics Studies
- Optical measurement and interference techniques
- Advanced Measurement and Metrology Techniques
- Photocathodes and Microchannel Plates
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Adaptive optics and wavefront sensing
- Optical and Acousto-Optic Technologies
- Quantum, superfluid, helium dynamics
- Molecular spectroscopy and chirality
- Advanced optical system design
Technical University of Liberec
2014-2024
Czech Academy of Sciences, Institute of Plasma Physics
2013-2024
Prague Institute of Planning and Development
2024
A. Alikhanyan National Laboratory
2023
University of Aveiro
2017-2023
University of Freiburg
2015-2019
Warsaw University of Technology
2019
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2017-2018
École Polytechnique Fédérale de Lausanne
2011-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2015-2017
Physics beyond the Standard Model predicts possible existence of new particles that can be searched at low energy frontier in sub-eV range. The OSQAR photon regeneration experiment looks for "Light Shining through a Wall" from quantum oscillation optical photons into "Weakly Interacting Sub-eV Particles", such as axion or Axion-Like Particles (ALPs), 9 T transverse magnetic field over unprecedented length $2 \times 14.3$ m. In 2014, this has been run with an outstanding sensitivity, using...
A new method to amplify the photon-axion conversions in a magnetic field is proposed using buffer gas at specific pressure photon-regeneration experiment. As first result, bounds for mass and coupling constant laboratory experiments aiming detect any hypothetical scalars pseudoscalars, which can couple photons were obtained, excluding with 95% confidence level, recently withdrawn PVLAS result.
Standard Model extensions often predict low‐mass and very weakly interacting particles, such as the axion. A number of small‐scale experiments at intensity/precision frontier are actively searching for these elusive complementing searches physics beyond colliders. Whilst a next generation will give access to huge unexplored parameter space, discovery would have tremendous impact on our understanding fundamental physics.
Vibrationally resolved spectra provide a stringent test of the accuracy theoretical calculations. We combine thawed Gaussian approximation (TGA) with an on-the-fly ab initio (OTF-AI) scheme to calculate vibrationally emission oligothiophenes up five rings. The efficiency OTF-AI-TGA permits treating all vibrational degrees freedom on equal footing even in pentathiophene 105 freedom, thus obviating need for global harmonic approximation, popular large systems. Besides reproducing almost...
Domain structures of unpoled as well poled (along [001]- and [110]-direction) Pb(Zn1/3Nb2/3)O3 (PZN)-8% PbTiO3 (PT) Pb(Mg1/3Nb2/3)O3 (PMN)-29% PT single crystals have been investigated by scanning force microscopy (SFM) in the piezoresponse mode, at room temperature. Antiparallel domain detected mostly both materials, with a fingerprint pattern (001)-oriented PZN-8% crystal. The ferroelastic wall has identified (110)-oriented “Writing” ferroelectric domains performed applying dc voltage to...
The problem of electromechanical film characterization, and, in particular, the determination piezoelectric activities thin films deposited on substrates, is fundamental importance development structures for microelectromechanical system (MEMS) applications. design and architecture MEMS are directly related to mechanical performances material. In this article, we present compare some results obtained different experimental setup d33 coefficient. We have optimized conditions using a laser...
The development of a large size gaseous detector single photons, able to stably operate at high gain and rate, provide good time resolution insensitivity magnetic field would be beneficial future Cherenkov Imaging Counters.The could based on the use multilayer architecture THGEM electron multipliers coupled solid state CsI photocathode.A systematic study response THGEM-based counters versus geometrical
In the context of a project to upgrade gas photon detectors of COMPASS RICH-1, we have performed an R&D programme aimed to develop detectors based on multi-layer arrangements of thick GEM electron multipliers coupled CsI photoconverter. For this purpose, thick GEMs been characterised in detail including gain performance, its dependance the geometrical parameters and time-evolution, feature exhibited by with open insulator surfaces. The variation due evolution drammatically depends on the...
Finding microRNA targets in the coding region is difficult due to overwhelming signal encoding amino acid sequence. Here, we introduce an algorithm (called PACCMIT-CDS) that finds potential within sequences by searching for conserved motifs are complementary seed and also overrepresented comparison with a background model preserving both codon usage Precision sensitivity of PACCMIT-CDS evaluated using PAR-CLIP proteomics data sets. Thanks properly constructed background, new achieves lower...
Photon detectors based on micropattern gas represent a new generation of gaseous photon detectors. In the context project to upgrade COMPASS RICH-1, we are performing an R&D programme aimed both establish principles and develop engineering aspects multi-layer arrangements thick GEMs electron multipliers coupled CsI photoconverter. this context, reduced rate backflow positive ions generated in multiplication process is required overcome critical issues related bombardment photoconverter by...
Recent theoretical and experimental studies highlight the possibility of new fundamental particle physics beyond Standard Model that can be probed by sub-eV energy experiments. The OSQAR photon regeneration experiment looks for "Light Shining through a Wall" (LSW) from quantum oscillation optical photons into "Weakly Interacting Sub-eV Particles" (WISPs), like axion or axion-like particles (ALPs), in 9 T transverse magnetic field over unprecedented length $2 \times 14.3$ m. No excess events...
We recently showed that the dephasing representation (DR) provides an efficient tool for computing ultrafast electronic spectra and further acceleration is possible with cellularization [M. Šulc J. Vaníček, Mol. Phys. 110, 945 (2012)]10.1080/00268976.2012.668971. Here, we focus on increasing accuracy of this approximation by first implementing exact Gaussian basis method, which benefits from quantum dynamics efficiency classical dynamics. Starting DR derived together ten other methods...
Evaluation of symmetry-forbidden or weakly-allowed vibronic spectra requires treating the transition dipole moment beyond Condon approximation. To include spectral features not captured in global harmonic models, we have recently implemented an on-the-fly ab initio extended thawed Gaussian approximation, where propagated wavepacket is a multiplied by linear polynomial. more anharmonic effects, here represent initial superposition three independent wavepackets - one for term and two displaced...
We explore three specific approaches for speeding up the calculation of quantum time correlation functions needed time-resolved electronic spectra. The first relies on finding a minimum set sufficiently accurate surfaces. second increases step required convergence exact simulations by using different split-step algorithms to solve time-dependent Schrödinger equation. third approach lowers number trajectories approximate semiclassical dynamics methods.
The photon detectors based on MPGD (MicroPattern Gaseous Detector) represent the new generation of gaseous detectors. We report about an R&D programme dedicated to study both principles and engineering aspects Thick GEMs (THGEM) electron multipliers coupled a CsI photoconverting coating.