The most used sensors in the context of vertex and tracker detectors at High Energy Physics (HEP) experiments are hybrid silicon pixels sensors, in which the sensing diode and the front-end electronics are separated elements bonded together by means of bump contacts. A different design of silicon pixel sensors is emerged and is the future for inner trackers: Monolithic Active Pixel Sensors (MAPS). Both the sensing part and the front-end electronics are hosted on the same silicon wafer. This leads to a strong reduction of the material budget and of production costs, to lower power consumption, and lower noise. The drawbacks of reduced radiation tolerance and slower charge collection can be partially overcome by the implementation of depleted MAPS (DMAPS), where the width of the depletion region is enhanced. The ALICE experiment, installed at the CERN Large Hadron Collider (LHC),is the first experiment to implement MAPS on a large scale: the current Inner Tracking System (ITS2) of ALICE employs MAPS based on 180 nm CMOS technology. The goal of future ALICE upgrades is to push forward the development of MAPS improving radiation hardness and high rate capabilities, increasing depletion depth, and reducing power consumption and material budget. Many R&D activities on the design and characterisation of MAPS prototypes are going on. Standard and complete sensor tests are usually done at test beams at accelerator facilities; however, quicker, more affordable techniques could be very useful. The goal of this thesis work was to design, implement, and validate a fully working, pulsed laser beam based table-top setup for testing MAPS.

The most used sensors in the context of vertex and tracker detectors at High Energy Physics (HEP) experiments are hybrid silicon pixels sensors, in which the sensing diode and the front-end electronics are separated elements bonded together by means of bump contacts. A different design of silicon pixel sensors is emerged and is the future for inner trackers: Monolithic Active Pixel Sensors (MAPS). Both the sensing part and the front-end electronics are hosted on the same silicon wafer. This leads to a strong reduction of the material budget and of production costs, to lower power consumption, and lower noise. The drawbacks of reduced radiation tolerance and slower charge collection can be partially overcome by the implementation of depleted MAPS (DMAPS), where the width of the depletion region is enhanced. The ALICE experiment, installed at the CERN Large Hadron Collider (LHC),is the first experiment to implement MAPS on a large scale: the current Inner Tracking System (ITS2) of ALICE employs MAPS based on 180 nm CMOS technology. The goal of future ALICE upgrades is to push forward the development of MAPS improving radiation hardness and high rate capabilities, increasing depletion depth, and reducing power consumption and material budget. Many R&D activities on the design and characterisation of MAPS prototypes are going on. Standard and complete sensor tests are usually done at test beams at accelerator facilities; however, quicker, more affordable techniques could be very useful. The goal of this thesis work was to design, implement, and validate a fully working, pulsed laser beam based table-top setup for testing MAPS.

Studies for the next generation monolithic pixel trackers for the ALICE experiment at the CERN LHC

PANTOUVAKIS, CATERINA
2022/2023

Abstract

The most used sensors in the context of vertex and tracker detectors at High Energy Physics (HEP) experiments are hybrid silicon pixels sensors, in which the sensing diode and the front-end electronics are separated elements bonded together by means of bump contacts. A different design of silicon pixel sensors is emerged and is the future for inner trackers: Monolithic Active Pixel Sensors (MAPS). Both the sensing part and the front-end electronics are hosted on the same silicon wafer. This leads to a strong reduction of the material budget and of production costs, to lower power consumption, and lower noise. The drawbacks of reduced radiation tolerance and slower charge collection can be partially overcome by the implementation of depleted MAPS (DMAPS), where the width of the depletion region is enhanced. The ALICE experiment, installed at the CERN Large Hadron Collider (LHC),is the first experiment to implement MAPS on a large scale: the current Inner Tracking System (ITS2) of ALICE employs MAPS based on 180 nm CMOS technology. The goal of future ALICE upgrades is to push forward the development of MAPS improving radiation hardness and high rate capabilities, increasing depletion depth, and reducing power consumption and material budget. Many R&D activities on the design and characterisation of MAPS prototypes are going on. Standard and complete sensor tests are usually done at test beams at accelerator facilities; however, quicker, more affordable techniques could be very useful. The goal of this thesis work was to design, implement, and validate a fully working, pulsed laser beam based table-top setup for testing MAPS.
2022
Studies for the next generation monolithic pixel trackers for the ALICE experiment at the CERN LHC
The most used sensors in the context of vertex and tracker detectors at High Energy Physics (HEP) experiments are hybrid silicon pixels sensors, in which the sensing diode and the front-end electronics are separated elements bonded together by means of bump contacts. A different design of silicon pixel sensors is emerged and is the future for inner trackers: Monolithic Active Pixel Sensors (MAPS). Both the sensing part and the front-end electronics are hosted on the same silicon wafer. This leads to a strong reduction of the material budget and of production costs, to lower power consumption, and lower noise. The drawbacks of reduced radiation tolerance and slower charge collection can be partially overcome by the implementation of depleted MAPS (DMAPS), where the width of the depletion region is enhanced. The ALICE experiment, installed at the CERN Large Hadron Collider (LHC),is the first experiment to implement MAPS on a large scale: the current Inner Tracking System (ITS2) of ALICE employs MAPS based on 180 nm CMOS technology. The goal of future ALICE upgrades is to push forward the development of MAPS improving radiation hardness and high rate capabilities, increasing depletion depth, and reducing power consumption and material budget. Many R&D activities on the design and characterisation of MAPS prototypes are going on. Standard and complete sensor tests are usually done at test beams at accelerator facilities; however, quicker, more affordable techniques could be very useful. The goal of this thesis work was to design, implement, and validate a fully working, pulsed laser beam based table-top setup for testing MAPS.
MAPS
pixel sensors
ALICE
tracking
laser
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12608/52999