A5103229841- 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
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Nuclear reactor physics and engineering
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Radiation Therapy and Dosimetry
- Particle accelerators and beam dynamics
- Distributed and Parallel Computing Systems
- Neurological disorders and treatments
- Planetary Science and Exploration
- Sparse and Compressive Sensing Techniques
- Fractal and DNA sequence analysis
- Modular Robots and Swarm Intelligence
- Robotics and Sensor-Based Localization
- Radiation Detection and Scintillator Technologies
Helsinki Institute of Physics
2003-2013
University of Helsinki
2000-2013
European Organization for Nuclear Research
2007-2013
CEA Paris-Saclay
2012
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012
Institut de Recherche sur les Lois Fondamentales de l'Univers
2012
Menlo School
2006-2007
SLAC National Accelerator Laboratory
2006-2007
Qinetiq (United Kingdom)
2007
Stanford Synchrotron Radiation Lightsource
2006
Geant4 is a software toolkit for the simulation of passage particles through matter. It used by large number experiments and projects in variety application domains, including high energy physics, astrophysics space science, medical physics radiation protection. Its functionality modeling capabilities continue to be extended, while its performance enhanced. An overview recent developments diverse areas presented. These include optimization complex setups; improvements propagation fields; new...
We present here a intra-nuclear cascade model implemented in Geant4 5.0. The is based on re-engineering of INUCL code. Models included are Bertini with exitons, pre-equilibrium model, nucleus explosion fission and evaporation model. Intermediate energy nuclear reactions from 100 MeV to 3 GeV treated for proton, neutron, pions, photon isotopes. represent overview the models, review results achieved simulations make comparisons experimental data.
Geant4 offers a set of models to simulate hadronic showers in calorimeters. Recent improvements several relevant the modelling are discussed. These include improved cross sections, revision FTF model, addition quasi-elastic scattering QGS and enhancements nuclear precompound de-excitation models. The validation physics against thin target experiments has been extended especially energy region 10 GeV below. Examples new results shown.
Good geometrical calibration is essential in the use of high resolution detectors. The individual sensors detector have to be calibrated with an accuracy better than intrinsic resolution, which typically order 10 um. We present effective method perform fine sensor positions a assembly consisting large number pixel and strip sensors. Up six geometric parameters, three for location orientation, can computed each on basis particle trajectories traversing system. performance demonstrated both...
Four of the most‐used Geant4 hadronic models, Quark‐gluon string, Bertini‐style cascade, Binary cascade and Chiral Invariant Phase Space, are discussed. These models cover high, medium low energies, respectively, represent a more theoretical approach to simulating interactions than do Low Energy High Parameterized models. The four together not yet all particles for so among others, used fill gaps.The validity range in energy particle type each model is presented, as discussion models'...
Geant4 is a software toolkit for the simulation of passage particles through matter. It has abundant hadronic models from thermal neutron interactions to ultra relativistic hadrons. An overview validations in physics presented based on thin‐target measurements. In most cases, good agreement available between Monte Carlo prediction and experimental data; however, several problems have been detected which require some improvement models.
The Geant4 hadronic models cover the entire range of energies required by calorimeters in new and planned experiments. extension improvement elastic, cascade, parameterized quark‐gluon string will be discussed. Such improvements include to more particle types, a review correction cross sections, better treatment energy momentum conservation. Concurrent with this development has been validation program which includes comparisons double differential sections. An ongoing shower also discussed...
We test the usage of a Toolkit for Multivariate Data Analysis (TMVA) in b tagging. Tagging jets associated with heavy neutral MSSM Higgs bosons at LHC can be used to extract from Drell-Yan background, which are mainly light quark and gluon jets. Achievable tagging efficiency is studied more than ten MVA classifiers 1% mistagging rate. Most were found perform better simple track counting algorithm.
A new Geant4 physics list is prepared for nuclear applications in the domain dominated by spallation. The C++ translation of original Fortran INCL intra-nuclear cascade and ABLA fission/de-excitation codes are used list. model well established targets heavier than Aluminium projectile energies from 150 MeV up to 2.5 GeV - 3 GeV. Validity demonstrated, neutron double differential cross sections residual nuclei production discussed. Foreseen improvements models treatment light (Carbon Oxygen)...
Geant4 provides a number of models for hadronic interactions and they are valid certain types beam particles over energy region. These validated using data from thin target experiments intermediate energies (between 2 30 GeV/c) nuclear targets. comparisons showed strengths weaknesses these will help to formulate good physics list application in high experiments.
We have developed a novel data acquisition system for measuring tracking parameters of silicon detector in particle beam. The is based on commercial Analog-to-Digital VME module and PC Linux Data Acquisition System. This DAQ realized with C++ code using object-oriented techniques. Track the beam particles were reconstructed off-line analysis automatic position alignment algorithm. new was used to test Czochralski type detectors. important parameters, including signal size distributions noise...