A5101503776- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Big Data Technologies and Applications
- Particle Accelerators and Free-Electron Lasers
- Radiation Effects in Electronics
- Advanced Data Storage Technologies
- Structural Analysis of Composite Materials
- Advanced Semiconductor Detectors and Materials
- Engineering and Materials Science Studies
- Digital Radiography and Breast Imaging
- Advanced MRI Techniques and Applications
- Statistical Distribution Estimation and Applications
- Islamic Thought and Society Studies
Czech Technical University in Prague
2018-2024
University Medical Center Freiburg
2021-2024
University of Freiburg
2021-2024
Université de Montréal
2016-2023
Institute of Particle Physics
2016-2023
The University of Adelaide
2016-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre
2019-2023
University College London
2021
Imperial College London
2021
King's College London
2021
We present a study of the radiation field at various locations in ATLAS experiment, using compact detector systems based on pixelated silicon sensors assembled with Timepix readout chips. The hodoscope design ATLAS-Timepix (TPX) detectors includes neutron converters between two sensors, allowing characterization both and charged particle fields track by basis. Thermal fast neutrons are discriminated segmenting sensor area dedicated sensitive materials. Using specific pattern recognition...
A network of Timepix (TPX) devices installed in the ATLAS cavern measures LHC luminosity as a function time stand-alone system. The data were recorded from 13 TeV proton-proton collisions 2015. Using two TPX devices, number hits created by particles passing pixel matrices was counted. van der Meer scan beams analysed using bunch-integrated averages over different bunch profiles for an approximate absolute normalization. It is demonstrated that has capability to measure reduction with...
A 1 mm thick CdTe sensor bump-bonded to a Timepix readout chip operating in Time-over-Threshold (ToT) mode has been characterized view of possible applications particle and medical physics. The layer was segmented into 256 × pixels, with pixel pitch 55 μm. This device, ohmic contact type, exposed alpha-particles photons from an 241Am source, 137Cs protons different energies (0.8–10 MeV) delivered by the University Montreal Tandem Accelerator. device irradiated on negatively biased backside...
Timepix3 devices are hybrid pixel detectors developed within the Medipix3 collaboration at CERN providing a simultaneous measurement of energy (ToT) and time arrival (ToA) in each its 256$\times$256 pixels (pixel pitch: 55 µm). The timestamp resolution below 2 ns allows charge carrier drift times, so that particle trajectories can be reconstructed 3D on microscopic level ($z$-resolution: 30-60 trajectory reconstruction methodology elsewhere is validated against simulated data ground truth...
The capability of Timepix3 detectors installed in ATLAS to measure luminosity is evaluated. It described how noisy pixels are identified and excluded. Two different methods for determination, i.e. cluster counting thermal neutron compared with each other. achieved short-term relative precision both determined by modeling the curve. shown that using a < 0.5 % can be 60 s time intervals. For neutrons, (for intervals) ≈ 2 was found. Hereby statistics limiting factor. findings discussed view...
A network of Timepix (TPX) devices installed in the ATLAS cavern measures Large Hadron Collider (LHC) luminosity as a stand-alone system. The data were recorded from 13-TeV proton–proton collisions 2016. Using two TPX devices, number hits created by particles passing pixel matrices was counted. Absolute is determined with van der Meer scan technique separating LHC proton beams and measuring widths low-intensity collisions. exact determination activation background contributes to overall...
Direct conversion semiconductor detectors have become an indispensable tool in radiation detection by now. In order to obtain a high efficiency, especially when detecting X or γ rays, high-Z sensors are necessary. Like other compound semiconductors GaAs, compensated chromium (GaAs:Cr), suffers from number of defects that affect the charge collection efficiency and homogeneity material. A precise knowledge this problem is important predict performance such eventually correct their response...
One of the challenges in directional deep brain stimulation (DBS) is to determine orientation implanted electrodes relative targeted regions. Post-operative images must be aligned with a model lead, usually computer-based provided by manufacturer. This paper shows that models can alternatively obtained capturing individual leads using micro-CT, high-resolution CT technique. Contrary computer-aided design models, lead generated this way provide realistic X-ray contrast and finer details.
A network of Timepix (TPX) devices installed in the ATLAS cavern has unique capability measuring luminosity with thermal neutron counting Large Hadron Collider proton-proton collisions at 13 TeV. Compared hit-counting method, method advantage that it is not affected by induced radioactivity. The results determination are presented for several independently operated TPX detectors. long-term time stability measurements individual and between different devices. high-statistics data sets allow a...
Abstract New developments of pixel detectors based on GaAs sensors offer effective registration the transition radiation (TR) X-rays and perform simultaneous measurements their energies emission angles. This unique feature opens new possibilities for particle identification basis maximum available information about generated TR photons. Results studies energy-angular distributions using a 500 |j.m thick sensor attached to Timepix3 chip are presented. Measurements, analysis techniques...
A network of Timepix (TPX) devices installed in the ATLAS cavern measures LHC luminosity as a function time stand-alone system. The data were recorded from 13 TeV proton-proton collisions 2015. Using two TPX devices, number hits created by particles passing pixel matrices was counted. van der Meer scan beams analysed using bunch-integrated averages over different bunch profiles for an approximate absolute normalization. It is demonstrated that has capability to measure reduction with...
Abstract The response of a Timepix3 (256 × 256 pixels, pixel pitch 55 μm) detector with 500 μm thick HR GaAs:Cr sensor was studied in proton beams 125 MeV at the Danish Centre for Particle Therapy Aarhus, Denmark and 120 GeV/ c pion beam Super-Proton Synchrotron (SPS) CERN. biased different voltages irradiated angles. readout chip configured to operate electron hole collection modes. Measurements grazing angles allowed see elongated tracks well-defined impact exit points, so that charge...
ATLAS-TPX detectors were used to measure ionising dose and charged particle fluences in the ATLAS experiment. We present a study of detector responses different species compare measurements with Geant4 simulations.