Use of swift CMOS sensors for X ray imaging with high sensitivity
type: Distribution
access URL: https://theses.hal.science/tel-00955895
format: HTML
issued: 2026-05-06T03:20:40.749759
modified: 2026-05-06T03:20:40.710300

test_moissonnage_selune
type: Agent

Use of swift CMOS sensors for X ray imaging with high sensitivity
type: Dataset
contact point: Organization
  fn: CCSD
keyword: imagerie-par-comptage
keyword: single-photons
keyword: cmos-pixel-sensors
keyword: photons-uniques
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: theses
keyword: counting-image
keyword: infoeu-reposemanticsdoctoralthesis
keyword: rayons-x
keyword: capteurs-a-pixel-cmos
keyword: x-rays
landing page: https://theses.hal.science/tel-00955895
description: This work investigates the potential application of CMOS pixel sensors, designed for particle tracking, for the detection of X rays. We explain how the image definition can be improved exploiting the single photon counting technique. An experimental system, based on an X ray source, is developed to measure the single point resolution of photons. Thanks to a full GEANT4 simulation of the device, the evaluation uncertainty is predicted to be 2 µm. We apply our method to the direct detection of low energy (< 10 keV) X rays by a CMOS pixel to measure a spatial resolution of 52 lp/mm. For higher energies, an hybrid device, coupling a CSi(Tl) highly segmented crystal with a CMOS sensor, is used. The spatial resolution reaches in this case 15 lp/mm. A detailed simulation study demonstrated that this limited performance is related to the characteristics of the light emitted by the crystal.
identifier: NNT: 2012STRAE047
issued: 2026-05-06T03:20:40.731390
language: fr
modified: 2026-05-06T03:20:40.731394