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Development of a 3D Silicon Coincidence Avalanche Detector (3D-SiCAD) for charged particle tracking

Matteo Maria Vignetti 1
1 INL - DE - INL - Dispositifs Electroniques
INL - Institut des Nanotechnologies de Lyon
Abstract : The objective of this work is to develop a novel position sensitive charged particle detector referred to as "3D Silicon Coincidence Avalanche Detector" (3D-SiCAD). The working principle of this novel device relies on a "time-coincidence" mode detection between a pair of vertically aligned Geiger-mode avalanche diodes, with the aim of achieving negligible noise levels with respect to detectors based on conventional avalanche diodes, such as Silicon Photo-Multipliers (SiPM), and, at the same time, providing single charged particle detection capability thanks to the high charge multiplication gain, inherent of the Geiger-mode operation. A 3D-SiCAD could be particularly suitable for nuclear physics applications, in the field of High Energy Physics experiments and emerging Medical Physics applications such as hadron-therapy and Proton Computed Tomography whose future developments demand unprecedented figures in terms of material budget, noise, spatial resolution, radiation hardness, power consumption and cost-effectiveness. In this work, a 3D-SiCAD demonstrator has been successfully developed and fabricated in the Austria Micro-Systems High-Voltage 0.35 μm CMOS technology by adopting a “flip-chip” approach for the 3D-assembling. The characterization results allowed demonstrating the feasibility of this novel device and validating the expected performances in terms of excellent particle detection efficiency and noise rejection capability with respect to background counts.
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Matteo Maria Vignetti. Development of a 3D Silicon Coincidence Avalanche Detector (3D-SiCAD) for charged particle tracking. Electronics. Université de Lyon, 2017. English. ⟨NNT : 2017LYSEI017⟩. ⟨tel-01920836⟩

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