UNIGE document Doctoral Thesis
previous document  unige:138577  next document
add to browser collection
Title

High-Voltage CMOS Pixel Detectors for the ATLAS ITk Upgrade

Author
Directors
Defense Thèse de doctorat : Univ. Genève, 2020 - Sc. 5455 - 2020/04/28
Abstract In this work the characterization of two sensors produced using the H35 and aH18 technologies by ams AG, the H35DEMO and the ATLASPIX1, is presented. The characterization focused on the charge-collection performance, the particle detection efficiency and the spatial and time resolution, measured before and after irradiation using protons and neutrons. The charge-collection performance has been studied using the transient current technique. The results have shown that the depletion depth increases significantly due to the acceptor removal effect of irradiation, which can compensate for the charge carriers loss caused by trapping. The particle detection efficiency and the space and time resolution have been studied in several testbeam campaigns. Results have shown an excellent efficiency, larger than 99%, which does not degrade after neutron irradiation. Proton irradiation, instead, produces a decrease in efficiency to 95% at a fluence of 1e15 neq/cm^2. These measurements have also allowed identifying a few shortcomings in the read-out circuitry, addressed in subsequent designs.
Identifiers
URN: urn:nbn:ch:unige-1385772
Full text
Thesis (17.6 MB) - public document Free access
Structures
Research group Groupe Iacobucci
Project FP7: STREAM
Citation
(ISO format)
ZAFFARONI, Ettore. High-Voltage CMOS Pixel Detectors for the ATLAS ITk Upgrade. Université de Genève. Thèse, 2020. doi: 10.13097/archive-ouverte/unige:138577 https://archive-ouverte.unige.ch/unige:138577

37 hits

15 downloads

Update

Deposited on : 2020-07-27

Export document
Format :
Citation style :