J. Wiechuła
A5069782669- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Statistical Methods and Bayesian Inference
- X-ray Diffraction in Crystallography
- Advanced Data Storage Technologies
- Atomic and Molecular Physics
- Computational Physics and Python Applications
- Solid-state spectroscopy and crystallography
- Stochastic processes and statistical mechanics
- CCD and CMOS Imaging Sensors
- Luminescence Properties of Advanced Materials
- Glass properties and applications
- X-ray Spectroscopy and Fluorescence Analysis
- Theoretical and Computational Physics
Goethe University Frankfurt
2016-2025
University of Bergen
2015-2024
University of Pavol Jozef Šafárik
2022-2024
A. Alikhanyan National Laboratory
2013-2024
Central China Normal University
2023
Chicago State University
2019
China Institute of Atomic Energy
2019
Lund University
2017-2018
University of Tübingen
2011-2017
Ludwig-Maximilians-Universität München
2017
The design, construction, and commissioning of the ALICE Time-Projection Chamber (TPC) is described. It main device for pattern recognition, tracking, identification charged particles in experiment at CERN LHC. TPC cylindrical shape with a volume close to 90 m^3 operated 0.5 T solenoidal magnetic field parallel its axis. In this paper we describe detail design considerations detector operation extreme multiplicity environment central Pb--Pb collisions LHC energy. implementation resulting...
The N/Z dependence of projectile fragmentation at relativistic energies has been studied with the ALADIN forward spectrometer GSI Schwerionen Synchrotron (SIS). Stable and radioactive Sn La beams an incident energy 600 MeV per nucleon have used in order to explore a wide range isotopic compositions. For interpretation data, calculations statistical multifragmentation model for properly chosen ensemble excited sources were performed. parameters ensemble, representing variety spectator nuclei...
The A/Z dependence of projectile fragmentation at relativistic energies has been studied with the ALADIN forward spectrometer SIS. A stable beam (124)Sn and radioactive beams (124)La (107)Sn 600 MeV per nucleon have used in order to explore a wide range isotopic compositions. Chemical freeze-out temperatures are found be nearly invariant respect produced spectator sources, consistent predictions for expanded systems. Small Coulomb effects (DeltaT approximately 0.6 MeV) appear residue...
The N/Z dependence of projectile fragmentation at relativistic energies has been studied in a recent experiment the GSI laboratory with ALADiN forward spectrometer coupled to LAND neutron detector. Besides primary beam 124 Sn , also secondary beams La and 107 delivered by FRS fragment separator have used order extend range isotopic compositions produced spectator sources. With achieved mass resolution ΔA/A ≈ 1.5%, lighter isotopes atomic numbers Z ≤ 10 are individually resolved. presently...
The characteristics of triple GEM detectors have been studied systematically by using cosmic ray muons. minimum ionizing particle (MIP) spectra taken for different voltage setting. Efficiency detector has measured ray. At high rate operation GEMs the value protection resistor influences gain and stability. This feature investigated varying both resistor. measurement performed X-ray generator Fe55 source. ageing long-term stability based employing study one module is a 8 keV Cu to verify...
ALICE is the dedicated heavy-ion experiment at CERN Large Hadron Collider (LHC). Its main tracking and particle-identification detector a large volume Time Projection Chamber (TPC). The TPC has been designed to perform well in high-track density environment created high-energy collisions. In this proceeding, we describe track reconstruction procedure ALICE. particular, focus on two challenges that were faced during Run 2 data-taking period (2015–2018) of LHC, which baseline fluctuations...
ALICE (A Large Heavy Ion Experiment) is one of the four large scale experiments at Hadron Collider (LHC) CERN. The High Level Trigger (HLT) an online computing farm, which reconstructs events recorded by detector in real-time. most compute-intense task reconstruction particle trajectories. main tracking devices are Time Projection Chamber (TPC) and Inner Tracking System (ITS). HLT uses a fast GPU-accelerated algorithm for TPC based on Cellular Automaton principle Kalman filter. employs...
ALICE is the dedicated heavy-ion experiment at LHC.Due to unique particle identification capabilities of central barrel detectors (|η| < 0.9), J/ψ can be measured in di-electron channel very demanding environment Pb-Pb collisions LHC.In addition are forward rapidity (2.5 y 4) with a muon spectrometer.ALICE only LHC an acceptance for that reaches down p T = 0 both, mid-and rapidity.Preliminary results on nuclear modification factor inclusive production √ s NN 2.76 TeV presented.
Abstract The aggregation kinetics of Mn 2+ ‐cation‐vacancy dipoles in the KCl matrix is examined by ESR and photoluminescence methods at room temperature. In dependence on annealing (aging) conditions four different products appear crystal: luminescent dipole aggregates (no line) formed during short temperature, two non‐luminescent ‐rich microprecipitates (K 4 MnCl 6 2 ) yielding distinct lines, a product not any detectable line. activation energies obtained for emission decay higher...
ALICE (A Large Ion Collider Experiment) is one of four major experiments at the Hadron (LHC) CERN. The High Level Trigger (HLT) a compute cluster, which reconstructs collisions as recorded by detector in real-time. It employs custom online data-transport framework to distribute data and workload among nodes. subdetectors sensitive environmental conditions such pressure temperature, e.g. Time Projection Chamber (TPC). A precise reconstruction particle trajectories requires calibration these...
Abstract A large-volume Time Projection Chamber (TPC) is the main tracking and particle identification (PID) detector of ALICE experiment at CERN LHC. PID in TPC performed via specific energy-loss measurements (d E /d x ), which are derived from average pulse-height distribution ionization generated by charged-particle tracks traversing volume. During Runs 1 2, until 2018, gas amplification stage was based on multiwire proportional chambers (MWPC). Signals MWPC show characteristic long...
The ALICE detector employs sub detectors sensitive to environmental conditions such as pressure and temperature, e.g. the time projection chamber (TPC). A precise reconstruction of particle trajectories requires calibration these detectors. Performing in real HLT improves online potentially renders certain offline steps obsolete, speeding up physics analysis. For LHC Run 3, starting 2020 when data reduction will rely on reconstructed data, becomes a necessity. In order run online, now...
The Time Projection Chamber (TPC) of the ALICE experiment at CERN LHC was upgraded for Run 3 and 4. Readout chambers based on Gas Electron Multiplier (GEM) technology a new readout scheme allow continuous data taking highest interaction rates expected in Pb-Pb collisions. Due to absence gating grid system, significant amount ions created multiplication region is enter TPC drift volume distort uniform electric field that guides electrons pads. Analytical calculations were considered correct...