2015 JINST TH 004
Ph.d. degree
University of Trento, Italy 2013
Marco Povoli
Supervisor: Gian-Franco Dalla Betta
Development of enhanced double-sided 3D radiation sensors for pixel detector upgrades at HL-LHC
Keywords:
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Radiation-hard detectors
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Solid state detectors
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Particle tracking detectors
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Detector modelling and simulations II (electric fields, charge transport,
multiplication and induction, pulse formation, electron emission, etc)
Abstract:
The upgrades of High Energy Physics (HEP) experiments at the
Large Hadron Collider (LHC) will call for new radiation hard technologies to be
applied in the next generations of tracking devices that will be required to
withstand extremely high radiation doses. In this sense, one of the most
promising approaches to silicon detectors, is the so called 3D technology. This
technology realizes columnar electrodes penetrating vertically into the silicon
bulk thus decoupling the active volume from the inter-electrode distance. 3D
detectors were first proposed by S. Parker and collaborators in the mid '90s as
a new sensor geometry intended to mitigate the effects of radiation damage in
silicon. 3D sensors are currently attracting growing interest in the field of
High Energy Physics, despite their more complex and expensive fabrication,
because of the much lower operating voltages and enhanced radiation hardness.
3D technology was also investigated in other laboratories,
with the intent of reducing the fabrication complexity and aiming at medium
volume sensor production in view of the first upgrades of the LHC experiments.
This work will describe all the efforts in design, fabrication and
characterization of 3D detectors produced at FBK for the ATLAS Insertable B-
Layer, in the framework of the ATLAS 3D sensor collaboration. In addition, the
design and preliminary characterization of a new batch of 3D sensor will also
be described together with new applications of 3D technology.