During the high luminosity runs of the LHC collider, the detectors will face great challenges due to the increase in the particle density. Precise time information will be fundamental to maintain good detector performance. In this article, a study of the characteristics of innovative 3D-trench pixel sensors with precise time measurement is presented. The sensors have been developed at the Fondazione Bruno Kessler in Trento by the TIMESPOT collaboration and the final detector should be capable of 20 ps time resolution, withstanding high radiation doses. In this work, first the static characteristics of the pixel sensors were measured, then their time resolution was studied with a laser system. Next, a sensor was tested with a 2 MeV energy proton beam at the Legnaro National Laboratories AN2000 accelerator facility. The time resolution has been extracted using an innovative time tag system, based on a thin layer of organic scintillator deposited above the detector combined with a Silicon Photomultiplier. The uniformity of the response in the pixel active area has been studied with a precision of a few micrometers. Preliminary results are promising and justify further investigations on the capabilities of these sensors.
Characterization of innovative pixel detectors with 3D technology
Borgato F.
2022
Abstract
During the high luminosity runs of the LHC collider, the detectors will face great challenges due to the increase in the particle density. Precise time information will be fundamental to maintain good detector performance. In this article, a study of the characteristics of innovative 3D-trench pixel sensors with precise time measurement is presented. The sensors have been developed at the Fondazione Bruno Kessler in Trento by the TIMESPOT collaboration and the final detector should be capable of 20 ps time resolution, withstanding high radiation doses. In this work, first the static characteristics of the pixel sensors were measured, then their time resolution was studied with a laser system. Next, a sensor was tested with a 2 MeV energy proton beam at the Legnaro National Laboratories AN2000 accelerator facility. The time resolution has been extracted using an innovative time tag system, based on a thin layer of organic scintillator deposited above the detector combined with a Silicon Photomultiplier. The uniformity of the response in the pixel active area has been studied with a precision of a few micrometers. Preliminary results are promising and justify further investigations on the capabilities of these sensors.
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