J. Kvasnička
A5101560904- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Renewable energy and sustainable power systems
- Building energy efficiency and sustainability
- Nuclear Physics and Applications
- Radiation Effects in Electronics
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- CCD and CMOS Imaging Sensors
- Medical Imaging Techniques and Applications
- Particle accelerators and beam dynamics
- Advancements in Semiconductor Devices and Circuit Design
- Superconducting Materials and Applications
- Experimental Learning in Engineering
- Integrated Circuits and Semiconductor Failure Analysis
- VLSI and Analog Circuit Testing
- Advanced Semiconductor Detectors and Materials
- Muon and positron interactions and applications
- Low-power high-performance VLSI design
- Superconducting and THz Device Technology
Czech Academy of Sciences, Institute of Physics
2014-2024
Czech Academy of Sciences
2014-2024
Simon Fraser University
2024
TRIUMF
2024
Deutsches Elektronen-Synchrotron DESY
2016-2023
University of California, Santa Cruz
2020-2022
Université Grenoble Alpes
2019
Centre National de la Recherche Scientifique
2018-2019
Laboratoire de Physique Subatomique et de Cosmologie
2019
Université Paris Cité
2018
Abstract The ATLAS experiment is constructing new all-silicon inner tracking system for HL-LHC. strip detectors cover the radial extent of 40 to 100 cm. A approach adopted use p-type silicon material, making readout in n + -strips, so-called -in-p sensors. This allows enhanced radiation tolerance against an order magnitude higher particle fluence compared LHC. To cope with varying hit rates and occupancies as a function distance, there are two barrel sensor types, short strips (SS) 2 long...
Abstract The CALICE collaboration is developing highly granular electromagnetic and hadronic calorimeters for detectors at future energy frontier electron-positron colliders. After successful tests of a physics prototype, technological prototype the Analog Hadron Calorimeter has been built, based on design construction techniques scalable to collider detector. consists steel absorber structure active layers small scintillator tiles that are individually read out by directly coupled SiPMs....
Abstract The bulk damage of p-type silicon detectors caused by high doses gamma irradiation has been studied. study was carried out on three types n + -in-p diodes with comparable geometries but different initial resistivities. This allowed to determine how parameters studied samples influence radiation-induced changes in the measured characteristics. were irradiated a Cobalt-60 source total ionizing ranging from 0.50 up 8.28 MGy, and annealed for 80 minutes at 60 °C. Geant4 toolkit...
The production of strip sensors for the ATLAS Inner Tracker (ITk) started in 2021. Since then, a Quality Assurance (QA) program has been carried out continuously, by using specific test structures, parallel to Control (QC) inspection sensors. QA consists monitoring sensor-specific characteristics and technological process variability, before after irradiation with gammas, neutrons, protons. After two years, half full volume reached we present an analysis parameters measured as part process....
The data acquisition software framework, EUDAQ, was originally developed to read out from the EUDET-type pixel telescopes. This successfully used in many test beam campaigns which an external position and time reference were required. has recently undergone a significant upgrade, EUDAQ2, is generic, modern modular system for use by different detector types, ranging tracking detectors calorimeters. EUDAQ2 suited as overarching that links individual readout systems simplifies integration of...
The new all-silicon Inner Tracker (ITk) is being constructed by the ATLAS collaboration to track charged particles produced at High-Luminosity LHC. outer portion of ITk detector will include nearly 18,000 highly segmented and radiation hard silicon strip sensors (ATLAS18 design). Throughout production 22,000 sensors, are subjected a comprehensive suite mechanical electrical tests as part Quality Control (QC) program. In large fraction batches delivered date, high surface electrostatic charge...
The ATLAS experiment will replace its existing Inner Detector with the new all-silicon Tracker (ITk) to cope operating conditions of forthcoming high-luminosity phase LHC (HL-LHC). outer regions ITk be instrumented ∼18000 ATLAS18 strip sensors fabricated by Hamamatsu Photonics K.K. (HPK). With launch full-scale sensor production in 2021, community has undertaken quality control (QC) testing these ensure compliance mechanical and electrical specifications agreed HPK. is conducted at seven QC...
This paper presents results obtained with the combined CALICE Scintillator Electromagnetic Calorimeter, Analogue Hadronic Calorimeter and Tail Catcher & Muon Tracker, three high granularity scintillator-silicon photomultiplier calorimeter prototypes. The response of system to pions momenta between 4 GeV/c 32 is analysed, including average energy response, resolution, longitudinal shower profiles. Two techniques are applied reconstruct initial particle from measured depositions; a standard...
Abstract The high-luminosity upgrade of the Large Hadron Collider, scheduled to become operational in 2029, requires replacement ATLAS Inner Detector with a new all-silicon Tracker. Radiation hard n + -in-p micro-strip silicon sensors were developed by Tracker strip collaboration and are produced Hamamatsu Photonics K.K. Production total amount 22000 has started 2020 will continue until 2025. sensor responsibility monitor quality fabricated devices performing detailed measurements individual...
The spatial development of hadronic showers in the CALICE scintillator-steel analogue hadron calorimeter is studied using test beam data collected at CERN and FNAL for single positive pions protons with initial momenta range 10–80 GeV/c. Both longitudinal radial are parametrised two-component functions. parametrisation fit to simulations QGSP_BERT FTFP_BERT physics lists from GEANT4 version 9.6. parameters extracted simulated samples compared two types hadrons. response ratio...
Abstract The successful pre-production delivery of strip sensors for the new Inner Tracker (ITk) upgraded ATLAS detector at High Luminosity LHC (HL-LHC) CERN was completed and based on their performance full production has commenced. overall period is anticipated to last 4 years complete approximately 22000 required ITk. For Quality Assurance (QA), a number test structures designed by collaboration, along with large area diode miniature version main sensor, are produced in every wafer...
EUDAQ is a generic data acquisition software developed for use in conjunction with common beam telescopes at charged particle lines. Providing high-precision reference tracks performance studies of new sensors, are essential the research and development towards future detectors high-energy physics. As time highly limited resource, has been designed reliability ease-of-use mind. It enables flexible integration different independent devices under test via their specific systems into top-level...
The CALICE Semi-Digital Hadron Calorimeter (SDHCAL) technological prototype is a sampling calorimeter using Glass Resistive Plate Chamber detectors with three-threshold readout as the active medium. This technology one of two options proposed for hadron International Large Detector Linear Collider. was exposed to beams muons, electrons and pions different energies at CERN Super Proton Synchrotron. To be able study performance such in future experiments it important ensure reliable simulation...
A neural network for software compensation was developed the highly granular CALICE Analogue Hadronic Calorimeter (AHCAL). The uses spatial and temporal event information from AHCAL energy information, which is expected to improve sensitivity shower development neutron fraction of hadron shower. method produced a depth-dependent weighting time-dependent threshold enhancing deposits consistent with timescale evaporation neutrons. Additionally, it observed learn an energy-weighting indicative...
To achieve state-of-the-art jet energy resolution for Particle Flow, sophisticated clustering algorithms must be developed that can fully exploit available information to separate deposits from charged and neutral particles. Three published neural network-based shower separation models were applied simulation experimental data measure the performance of highly granular CALICE Analogue Hadronic Calorimeter (AHCAL) technological prototype in distinguishing deposited by a single hadron Flow....
We present a study of showers initiated by electrons, pions, kaons, and protons with momenta from 15 GeV to 150 in the highly granular CALICE scintillator-tungsten analogue hadronic calorimeter. The data were recorded at CERN Super Proton Synchrotron 2011. analysis includes measurements calorimeter response each particle type as well energy resolution studies longitudinal radial shower development for selected particles. results are compared Geant4 simulations (version 9.6.p02). In we...
The Quality Control (QC) of pre-production strip sensors for the Inner Tracker (ITk) ATLAS Detector upgrade has finished, and collaboration embarked on QC test programme production sensors. This will last more than 3 years comprises evaluation approximately 22000 8 Types sensors, 2 barrel 6 endcap, be measured at many different collaborating institutes. sustained throughput requirement combined processes is around 500 per month in total. Measurement protocols have been established acceptance...