A5085446959- Fusion materials and technologies
- Nuclear Physics and Applications
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Electron and X-Ray Spectroscopy Techniques
- Plasma Diagnostics and Applications
- Diamond and Carbon-based Materials Research
- Radiation Detection and Scintillator Technologies
- Force Microscopy Techniques and Applications
- Air Quality Monitoring and Forecasting
- Advanced Optical Sensing Technologies
- Mechanical and Optical Resonators
- CCD and CMOS Imaging Sensors
Czech Technical University in Prague
2020-2025
The Hanbury Brown–Twiss (HBT) effect holds a pivotal place in intensity interferometry and gave seminal contribution to the development of quantum optics. To observe such an effect, both good spectral timing resolutions are necessary. Most often, HBT is observed for single frequency at time due its limitations dealing with multifrequencies simultaneously, halting limiting some applications. Here, we report fast data-driven spectrometer built one-dimensional array single-photon-sensitive...
Abstract Cross-talk is a well-known feature of single-photon avalanche detectors. It especially important to account for this effect in applications involving temporal coincidences two or more photons registered by the sensor since case cross-talk may mimic useful signal. In work, we characterize LinoSPAD2 detector, as well perform joint measurements and Hanbury Brown-Twiss two-photon interference, comparing cross-calibrating both effects. With median dark count rate 125 cps/pixel, report...
Runaway electrons, accelerated in a tokamak discharge to high energies (tens of MeV), can cause serious damage plasma facing components. Therefore, it is important develop effective mitigation strategies reduce the risk damage. To study effects various strategies, dedicated diagnostic, calorimetry probe, was developed at COMPASS tokamak. This probe successfully measured heat loads caused by runaway electrons directly, using set temperature sensors embedded graphite body. Deposited energy...
We present a proof-of-principle measurement of runaway electrons in small tokamak using silicon strip detector. The detector was placed inside the diagnostic port vessel and detected electron signal directly. measured compared to provided by other diagnostics, especially hard X-ray scintillation detector, which detects secondary photons created interaction accelerated with walls (indirect detection electrons). preliminary results show that when not saturated, direct segmented provides...
Abstract Runaway electrons are considered dangerous for the integrity of tokamak vacuum vessels. To secure success future tokamak-based machines, reliable diagnostics and mitigation strategies necessary. The COMPASS supported research runaway electron physics via regular experimental campaigns. During last two campaigns dedicated to electrons, a semiconductor detector with Timepix3 readout chip, Si sensor, SPIDR system was tested. Time evolution signals, energy measurements, sensor snapshots...