Abstract PolarLight is a gas pixel X-ray polarimeter mounted on CubeSat, which was launched into Sun-synchronous orbit in 2018 October. We build mass model of the whole CubeSat with Geant4 toolkit to simulate background induced by cosmic (CXB) and high-energy charged particles orbit. The simulated energy spectra morphologies event images both suggest that measured dominated electrons, minor con...

Relevance. The photofission of shielded nuclear materials is widely used to develop methods for non-destructive analysis their isotopic composition. To stimulate the reaction, bremsstrahlung beams obtained on electronic accelerators are used. Their parameters significantly depend design features and sample activation schemes. Purpose. Theoretical modelling an optimal scheme stimulating accelera...

We discuss several features of hadronic showers recorded in the high granularity CALICE Si-W ECAL and scintillator-tile HCAL and confront them with several Geant4 physics models. The first measurements of the time-structure of hadronic showers in a tungsten scintillator calorimeter are presented. The high granularity of the CALICE calorimeters allows a software compensation which improves the e...

An algorithm has been developed for the GEANT4 Monte-Carlo package for the efficient computation of screened Coulomb interatomic scattering. It explicitly integrates the classical equations of motion for scattering events, resulting in precise tracking of both the projectile and the recoil target nucleus. The algorithm permits the user to plug in an arbitrary screening function, such as Lens-Je...

A new Geant4 physics list is prepared for nuclear physics 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 in the physics list. The INCL model prepared is well established for targets heavier than Aluminium and projectile energies from ∼ 150 MeV up to 2.5 GeV ∼ 3 GeV. Validity of ...

An algorithm has been developed for the GEANT4 Monte-Carlo package for the efficient computation of screened Coulomb interatomic scattering. It explicitly integrates the classical equations of motion for scattering events, resulting in precise tracking of both the projectile and the recoil target nucleus. The algorithm permits the user to plug in an arbitrary screening function, such as Lens-Je...

A technique to measure low intensity fast neutron flux has been developed. The design, calibrations, procedure for data analysis and interpretation of the results are discussed in detail. The technique has been applied to measure the neutron background from rock at the Boulby Underground Laboratory, a site used for dark matter and other experiments, requiring shielding from cosmic ray muons. Th...

We present an Open-source library called gVirtualXRay to simulate realistic X-ray images in realtime. It implements the attenuation law (also called Beer-Lambert) on GPU. It takes into account the polychromatism of the beam spectra as well as the finite size of X-ray tubes. The library is written in C++ using modern OpenGL. It is fully portable and works on most common desktop/laptop computers....

PURPOSE With the advent of magnetic resonance imaging (MRI)-guided radiation therapy it is becoming increasingly important to consider the potential influence of a magnetic field on ionising radiation. This paper aims to study the effect of a magnetic field on the track structure of radiation to determine if the biological effectiveness may be altered. METHODS Using the Geant4-DNA (GEometry A...