PROPOSITION DE THÈSE 2016
DE STAGE M2
+33(0)1 64 46 83 00
+33(0)1 69 46 83 97
Groupe du Laboratoire
Adresse et lieu du stage
téléphone
e-mail
ATLAS
LAL Université Paris-Sud- Bâtiment 200
BP 34 – 91898 Orsay cédex
01 64 46 83 74
[email protected]
Titre : Advanced Planar Pixel technology developments for the ATLAS
upgrade Phase 2
Précisions sur le sujet proposé :
The aim of the thesis consists of a technical research and development
programme to study and enhance the actual knowledge of advanced
silicon pixel sensors for tracking and timing applications in High
Energy Physics.
The upgrade of the ATLAS vertex detectors for the HL-LHC phase poses
very strong requirements to the pixel systems in terms of radiation
hardness, high performance, low noise and reduced material budget.
Granular hybrid pixel modules are the most evident candidates to
instrument the inner layers at HL-LHC and they also represent an
attractive solution to be exploited in next generation for future project
collider experiments* .
Important efforts are carried on at LAL on innovative designs of
edgeless silicon planar pixel sensors with very fine pitches and low
thickness to be used in ATLAS high luminosity phase (HL-LHC). For
this task, we intend to work in a joint research academic and
industrial framework including specialized foundries in Europe to
further develop new promising technologies based on planar pixel
sensors and also silicon based Low Gain Avalanche Detectors (LGAD).
An effort will be put to set close collaborations with R&D centres (CEALETI Grenoble) and companies regarding the vertical integration
technologies inter connexions which constitute an attractive approach
to increase the sensitivity of the full surface of the detection area using
state of the art innovative silicon wafer stacking technologies.
In this work, we intend to investigate dedicated irradiation models
using Technology Computed Aided simulators for thin pixel sensor in
order to have a better understanding of the radiation damage of silicon
pixel vertexes used in very harsh radioactive environment. Reliability of
TCAD simulators will be reinforced thanks to doping profile
measurement approach developed with our partner from CNRSVersailles GEMaC** Laboratory using Secondary Ion Mass
Spectroscopy experimental facility. State of the art and modern
experimental infrastructure located in CAPTINOV clean Room will be
used to probe and characterize new pixel concepts that will developed
in the framework of this project.
The optimization of hybrid pixel sensors will allow for a wider
application of this technology to be used not only for tracking
applications but also where challenging timing applications and high
gain requirements are mandatory.
There will be of a large collaborative effort with foundries and research
laboratories to bring this type of challenging (Planar or LGAD) design
to a level where these detectors can be fully fruited in future projects
in high energy physics experiments and also as spinoff for the medical
field, in the detectors for synchrotron light sources and material
science.