A5031320315- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Computer Graphics and Visualization Techniques
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Laser Design and Applications
- Solid State Laser Technologies
- 3D Shape Modeling and Analysis
- Advanced Optical Imaging Technologies
- Advanced Vision and Imaging
- Laser-Matter Interactions and Applications
- Engineering Technology and Methodologies
- Aesthetic Perception and Analysis
- Target Tracking and Data Fusion in Sensor Networks
- Photorefractive and Nonlinear Optics
- Thermography and Photoacoustic Techniques
- Infrared Target Detection Methodologies
- Strong Light-Matter Interactions
- Advanced Measurement and Metrology Techniques
- Advanced Thermodynamics and Statistical Mechanics
- Robotic Mechanisms and Dynamics
- Random lasers and scattering media
- Laser Material Processing Techniques
- Optical and Acousto-Optic Technologies
Czech Academy of Sciences, Institute of Physics
2017-2020
Czech Technical University in Prague
2011-2017
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...
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...
The OSQAR photon regeneration experiment searches for pseudoscalar and scalar axion-like particles by the method of "Light Shining Through a Wall", based on assumption that these weakly interacting sub-eV couple to two photons give rise quantum oscillations with optical in strong magnetic field. No excess events has been observed, which constrains di-photon coupling strength both down $5.7 \cdot 10^{-8}$ GeV$^{-1}$ massless limit. This result is most stringent constraint ever achieved...
Imaging of surface textures requires many combinations incident illumination angles and detector view. Kaleidoscope is one the means for measurement bidirectional texture function various sample surfaces. An optical system featuring kaleidoscope proposed in paper. Optical parameters such an imaging are described evaluated. We also discuss optimization process these which influences overall performance a device. provide visualization designs.
Recent intensive theoretical and experimental studies shed light on possible new physics beyond the standard model of particle physics, which can be probed with sub-eV energy experiments. In second run OSQAR photon regeneration experiment, looks for conversion to axion (or Axion-Like Particle), two spare superconducting dipole magnets Large Hadron Collider (LHC) have been used. this paper we report first results obtained from a beam propagating in vacuum within 9 T field LHC magnets. No...
Optical systems are traditionally used for accurate recording and measurement of the real world's appearance. Present techniques allow us to form a computer-based virtual world, which is in variety technical fields. The crucial issue future applications reality fidelity rendered images real-world objects. This strongly affected by appearance object's surfaces. Currently, most applied method describing surface's visual spatially nonuniform surfaces bidirectional texture function (BTF). We...
Realistic reproduction of appearance real-world materials by means computer graphics requires accurate measurement and reconstruction surface reflectance properties. We propose an interactive software simulation tool for modeling properties a kaleidoscopic optical system measurement. use ray tracing to obtain fine grain results corresponding the resolution simulated image sensor computing reflections inside this based on planar mirrors. allow different geometric configurations kaleidoscope...
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...
Spectral measurements of the night sky provide important information about natural light sources and pollution. Analysis spectral data enables identification interesting events occurring in atmosphere. We describe used method technical solution, as well first obtained results. Photometric simulations were performed under laboratory conditions. The results compared with measured whole respect to location timing. outdoor provided spectroscopic for examining pollution background.
The measurement of spatially varying surface reflectance is required for faithful reproduction real world to allow predictive look computer generated images. One such proposed method uses a rotational kaleidoscopic imaging, where illumination and imaging paths are realized by subimages on mirrors carried out DLP projector. We describe novel geometric calibration kaleidoscope that necessary get aligned accurate data from measurement. has two stages. first stage mechanically adjusts the...
Two optical methods are used in the laser-based experiment OSQAR at CERN for search of axions and axion-like particles. The first method looks as light shining through wall. second one wants to measure ultra-fine vacuum magnetic birefringence. Both have reached its attainable limits sensitivity. Present work is focused on increasing number photons their endurance time within field using a laser cavity. Presented paper covers recent state development prototype 1 meter long cavity which...
We report recent progress in design and testing of a distribution system for high-power laser beam delivery developed within the HiLASE project IOP Czech Republic. Laser is technical allowing safe precise different beams from laboratories to several experimental stations. The unique nature lasers requires new approach, which makes state-of-the-art challenge.
This paper gives short overview of laser-based experiment OSQAR at CERN which is focused on search axions and axion-like particles. The uses two experimental methods for axion – measurement the ultra-fine vacuum magnetic birefringence a method based "Light shining through wall" experiment. Because both have reached its attainable limits sensitivity we designing laser resonator. resonator will increase number convertible photons their endurance time within field. presents an opto-mechanical...
This paper covers a description and technique of possible optical method mode locking within laser resonator. The measurement system is part instrumentation laser-based experiment OSQAR at CERN. aims search axions, axion-like particles measuring ultra-fine vacuum magnetic birefringence. It uses resonator to enhance the coupling constant hypothetical photon-to-axion conversion. developed locking-in based on differential interferometry. Signal obtained from provide crucial information for...
We present recent progress in design of innovative versatile laser head for lasers based on thin-disk architecture which are being constructed at the HiLASE centre IOP Czech Republic. Concept technology allows construction providing excellent beam quality with high average output power and optical efficiency. Our newly designed carrier pump module comes from scheme consisting a parabolic mirror roof mirrors proposed 90's. However, mechanical parts cooling system were in-house simplified...
This paper presents a short analysis of possible techniques for fusion targets tracking in rep-rate regime. Target solution is limited with necessity high speed, precise and long-distance measurement combined harsh environment the vacuum chamber. The only optical seems to be usable meet required conditions system. Few standards less traditional methods are presented this paper. Its possibility target goal resolution discussed. Preparation experimental verification suggested shown too.
OSQAR experiment at CERN is based on two laser methods for search of axions and scalar particles. The light shining through the wall has been using LHC dipole magnets with an optical barrier, argon laser, cooled 2D CCD detector measuring expected regenerated photons. second method wants to measure Vacuum Magnetic Birefringence. An set-up electro-optical modulator proposed, validated subsequently improved in collaborating institutes. Cotton-Muton effect nitrogen was measured by this method....
Laser beam distribution requires complex opto-mechanical system allowing safe and precise delivery of different laser beams from hall laboratories to experimental workstations developed within the HiLASE project IOP in Czech Republic.The unique nature new generation high energy diode-pumped solid state systems with repetition rates advanced design approach.We use modular approach that allows gradual modification flexible change layout according current laboratory needs as well customization...