First study of small-cell 3D Silicon Pixel Detectors for the High Luminosity LHC
E. Curr\'as (1), J. Duarte-Campderr\'os (1), M. Fern\'andez (1), A., Garc\'ia (1), G. G\'omez (1), J. Gonz\'alez (1), R. Jaramillo (1), D. Moya, (1), I. Vila (1), S. Hidalgo (2), M. Manna (2), G. Pellegrini (2), D. Quirion, (2), D. Pitzl (3), A. Ebrahimi (4), T. Rohe (5)
TL;DR
This paper presents the first study of small-cell 3D silicon pixel detectors for the High Luminosity LHC, focusing on their response to ionizing radiation and performance metrics in a test beam.
Contribution
It introduces the first investigation of 50x50 μm^2 3D pixel sensors with a new hybrid assembly and evaluates their performance post-irradiation.
Findings
High efficiency and good charge sharing observed
Stable signal-to-noise ratio across angles
Promising resolution for future high-luminosity applications
Abstract
A study of 3D pixel sensors of cell size 50 {\mu}m x 50 {\mu}m fabricated at IMB-CNM using double-sided n-on-p 3D technology is presented. Sensors were bump-bonded to the ROC4SENS readout chip. For the first time in such a small-pitch hybrid assembly, the sensor response to ionizing radiation in a test beam of 5.6 GeV electrons was studied. Results for non-irradiated sensors are presented, including efficiency, charge sharing, signal-to-noise, and resolution for different incidence angles.
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