Integration of polarization in the LUTDavis Model for optical Monte Carlo simulation in radiation detectors
| Autor: | Carlotta Trigila, Emilie Roncali |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Photon
Physics::Instrumentation and Detectors Plane of incidence Clinical Sciences Monte Carlo method Biomedical Engineering Geant4 Physics::Optics Photodetector Particle detector Article Optics Geant4/GATE Photon polarization Radiology Nuclear Medicine and imaging Computer Simulation photon polarization Physics Scintillation Photons Radiological and Ultrasound Technology business.industry GATE Polarization (waves) LUT Davis model Other Physical Sciences Nuclear Medicine & Medical Imaging Cerenkov photons business Monte Carlo Method Algorithms |
| Zdroj: | Phys Med Biol Physics in medicine and biology, vol 66, iss 21 |
| Popis: | OBJECTIVE Cerenkov photons have distinctive features from scintillation photons. Among them is their polarization: their electric field is always perpendicular to the direction of propagation of light and parallel to the plane of incidence. Scintillation photons are instead considered unpolarized. APPROACH This study aims at understanding and optimizing the reflectance of polarized Cerenkov photons for optical Monte Carlo simulation of scintillation detectors with Geant4/GATE. First, the Cerenkov emission spectrum and polarization were implemented in the previously developed look-up-table Davis model of crystal reflectance. Next, we modified Geant4/GATE source code to account for scintillation and Cerenkov photons LUTs simultaneously. Then, we performed optical Monte Carlo simulations in BGO using GATE to show the effect of Cerenkov features on the photons' momentum at the photodetector face, using two surface finishes, with and without reflector. MAIN RESULTS In this work, we describe the new features added to the algorithm and GATE. We showed that Cerenkov characteristics affect their probability to be reflected/refracted and thus their travel path within a material. SIGNIFICANCE We showed the importance of accounting for accurate Cerenkov photons reflectance while performing advanced optical Monte Carlo simulations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|