Development of a new generation of micro-structured semi-conductor detectors for X-rays medical imaging
type: Dataset
description: In X-ray medical imaging, semi-conductors tend to replace scintillator crystals (most of the commercial devices), thank to their higher spatial resolution and energy resolution. Counting mode is another tendency, because it allows reducing the radiation dose delivered to the patient. This work aims at developing a new generation of semi-conductor detectors, different from CdTe / CdZnTe for environmental concerns, and associated with a new detection structure (3D geometry). Semi-insulating GaAs from specific growth and supplier, with adapted metallic electrodes, shows the ability to count photons. Then, a proof of concept of the 3D geometry is provided, through the characterization of electrodes machining in bulk material, metal deposition and connection to a read-out electronic circuit. Finally, the achievement of these objectives is reflected in the preliminary characterization of 3D detector based on semi-insulating GaAs.
landing page: https://theses.hal.science/tel-00707718
identifier: NNT: 2012PA112078
keyword: 3d-structure
keyword: cdte
keyword: detecteur-de-rayons-x
keyword: detecteur-micro-structure
keyword: gaas
keyword: infoeu-reposemanticsdoctoralthesis
keyword: laser-micro-machining
keyword: micro-structured-detector
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: structure-3d
keyword: theses
keyword: usinage-laser
keyword: x-rays-detector
issued: 2026-05-15T18:25:39.239745
modified: 2026-05-15T18:25:39.239750
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Development of a new generation of micro-structured semi-conductor detectors for X-rays medical imaging
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00707718
issued: 2026-05-15T18:25:39.244118
modified: 2026-05-15T18:25:39.192603