A5054754129- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Radiation Therapy and Dosimetry
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Advanced Radiotherapy Techniques
- Superconducting Materials and Applications
- Renewable Energy and Sustainability
- Medical Imaging Techniques and Applications
- Distributed and Parallel Computing Systems
- Advanced X-ray and CT Imaging
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear physics research studies
- Cold Fusion and Nuclear Reactions
Physikalisch-Technische Bundesanstalt
2023-2025
Deutsches Elektronen-Synchrotron DESY
2008-2022
Helmholtz-Zentrum Dresden-Rossendorf
2017-2021
Institute of High Energy Physics
2012-2017
University of Hassan II Casablanca
2014-2015
European Organization for Nuclear Research
2012-2014
UCLouvain
2013
Austrian Academy of Sciences
2012
Institute of Nuclear and Particle Physics
2012
National Centre of Scientific Research "Demokritos"
2012
An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members the CALICE Collaboration. The AHCAL consists a 38-layer sandwich structure steel plates and highly-segmented scintillator tiles that are read out wavelength-shifting fibers coupled to SiPMs. signal is amplified shaped with custom-designed ASIC. A calibration/monitoring system based on LED light was developed monitor SiPM gain measure full response curve in order correct...
The studies presented in this paper provide a first experimental test of the Particle Flow Algorithm (PFA) concept using data recorded high granularity calorimeters. Pairs overlaid pion showers from CALICE 2007 beam are reconstructed by PandoraPFA program developed to implement PFA for future lepton collider. Recovery neutral hadron's energy vicinity charged hadron is studied. impact two overlapping on resolution investigated. dependence confusion error distance between 10 GeV and derived...
The energy resolution of a highly granular 1 m3 analogue scintillator-steel hadronic calorimeter is studied using charged pions with energies from 10 GeV to 80 at the CERN SPS. for single hadrons determined be approximately 58%/sqrt(E/GeV}. This improved 45%/sqrt(E/GeV) software compensation techniques. These techniques take advantage event-by-event information about substructure showers which provided by imaging capabilities calorimeter. reconstruction either corrections based on local...
The CALICE Semi-Digital Hadronic Calorimeter (SDHCAL) prototype, built in 2011, was exposed to beams of hadrons, electrons and muons two short periods 2012 on different beam lines the CERN SPS. prototype with its 48 active layers, made Glass Resistive Plate Chambers their embedded readout electronics, run triggerless power-pulsing mode. performance SDHCAL during test found be very satisfactory an efficiency exceeding 90% for almost all layers. A linear response (within 5%) a good energy...
Abstract Background In ion beam radiotherapy, treatment radiation fields are inevitably contaminated with secondary neutrons. The energies of these neutrons can reach several hundreds MeV. Fluorescent nuclear track detectors (FNTDs) offer a promising solution for dosimetry fast and high‐energy neutrons, particularly given their low linear energy transfer in water (LET) detection threshold. Purpose This study presents an experimental FNTD sensitivity analysis six mono‐energetic neutron...
The CALICE collaboration is studying the design of high performance electromagnetic and hadronic calorimeters for future International Linear Collider detectors. For calorimeter, one option a highly granular sampling calorimeter with steel as absorber scintillator layers active material. High granularity obtained by segmenting into small tiles individually read out via silicon photo-multipliers (SiPM). A prototype has been built, consisting thirty-eight sensitive layers, segmented about...
The clinical implementation of a variable relative biological effectiveness (RBE) in proton therapy is currently controversially discussed. Initial evidence indicates RBE, which needs to be verified. In this study, radiation response modelling framework for assessing RBE variability established. It was applied four selected glioma patients (grade III) treated with adjuvant radio(chemo)therapy and who developed late morphological image changes on T1-weighted contrast-enhanced (T1w-CE)...
A prototype silicon-tungsten electromagnetic calorimeter for an ILC detector was tested in 2007 at the CERN SPS test beam. Data were collected with electron and hadron beams energy range 8 to 80 GeV. The analysis described here focuses on interactions of pions calorimeter. One main objectives CALICE program is validate Monte Carlo tools available design a full-sized detector. Si-W are therefore confronted predictions various physical models implemented GEANT4simulation framework.
Calorimeters with a high granularity are fundamental requirement of the Particle Flow paradigm. This paper focuses on prototype hadron calorimeter analog readout, consisting thirty-eight scintillator layers alternating steel absorber planes. The plates finely segmented into tiles individually read out via Silicon Photomultipliers. presented results based data collected pion beams in energy range from 8 GeV to 100 GeV. fine segmentation sensitive and sampling frequency allow for an excellent...
EJ-276 is a recent development in plastic scintillators that comes with improved pulse shape discrimination over its predecessor EJ-299-33. In this work, the neutron response functions, proton light output function, and detection efficiency of were measured using mono-energetic reference fields at national metrology laboratory, Physikalisch-Technische Bundesanstalt, energy range 1.5–19 MeV. particular, 14–19 MeV presented for first time. The optimization Pulse Shape Discrimination has also...
A detailed study of hadronic interactions is presented using data recorded with the highly granular CALICE silicon-tungsten electromagnetic calorimeter. Approximately 350,000 selected negatively charged pion events at energies between 2 and 10 GeV have been studied. The predictions several physics models available within Geant4 simulation tool kit are compared to this data. reasonable overall description observed; Monte Carlo 20% data, for many observables much closer. largest quantitative...
A first prototype of a scintillator strip-based electromagnetic calorimeter was built, consisting 26 layers tungsten absorber plates interleaved with planes 45×10×3 mm3 plastic strips. Data were collected using positron test beam at DESY momenta between 1 and 6 GeV/c. The prototype׳s performance is presented in terms the linearity resolution energy measurement. These results represent an important milestone development highly granular calorimeters strip technology. number possible design...
A prototype module for an International Linear Collider (ILC) detector was built, installed, and tested between 2006 2009 at CERN Fermilab as part of the CALICE test beam program, in order to study possibilities extending energy sampling behind a hadronic calorimeter providing muon tracking. The "tail catcher/muon tracker" (TCMT) is composed 320 extruded scintillator strips (dimensions 1000 mm x 50 5 mm) packaged 16 one-meter square planes interleaved steel plates. were read out with...
Lepton colliders are considered as options to complement and extend the physics programme at Large Hadron Collider. The Compact Linear Collider (CLIC) is an e+e− collider under development aiming centre-of-mass energies of up 3 TeV. For experiments CLIC, a hadron sampling calorimeter with tungsten absorber proposed. Such provides sufficient depth contain high-energy showers, while allowing compact size for surrounding solenoid. A fine-grained prototype plates scintillator tiles read out by...
The intrinsic time structure of hadronic showers influences the timing capability and required integration calorimeters in particle physics experiments, depends on active medium absorber calorimeter. With CALICE T3B experiment, a setup 15 small plastic scintillator tiles read out with Silicon Photomultipliers, is measured statistical basis high spatial temporal resolution sampling tungsten steel absorbers. results are compared to GEANT4 (version 9.4 patch 03) simulations different models....
The SPIROC chip is a dedicated very front-end ASIC for an ILC hadronic calorimeter technical prototype with Silicon Photomultiplier (or MPPC) readout. This due to equip 2,000-channel demonstrator in 2009. the successor of SiPM presently used AHCAL physics prototype, incorporating additional features like auto-triggering, pipelines, digitization as well power pulsing. Realized 0.35 ¿m SiGe technology, it designed order fulfill final detector requirements large dynamic range, low noise,...
Showers produced by positive hadrons in the highly granular CALICE scintillator-steel analogue hadron calorimeter were studied. The experimental data collected at CERN and FNAL for single particles with initial momenta from 10 to 80 GeV/c. response resolution spatial characteristics of shower development proton- pion-induced showers test beam simulations using Geant4 version 9.6 are compared.
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 primary reference instruments for neutron fluence measurements used at the Physikalisch-Technische Bundesanstalt are based on standard which is differential neutron–proton scattering cross section. Such require considerable effort their operation and analysis. Therefore, routine carried out using a transfer instrument to facilitate efficient provision of services customers. A series was conducted compare device ensure traceability measurements. This resulted in an improved...
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...