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arXiv · 2006.01999

Measurements of an AC-LGAD strip sensor with a 120 GeV proton beam

Artur Apresyan·Wei Chen·Gabriele D'Amen·Karri Folan Di Petrillo·Gabriele Giacomini·Ryan Heller·Hakseong Lee·Sergey Los·Chang-Seong Moon·Alessandro Tricoli
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Abstract

The development of detectors that provide high resolution in four dimensions has attracted wide-spread interest in the scientific community for several applications in high-energy physics, nuclear physics, medical imaging, mass spectroscopy as well as quantum information. In addition to high time resolution and thanks to the AC-coupling of the electrodes, LGAD silicon sensors can provide high resolution in the measurement of spatial coordinates of an incident minimum ionizing particle. Such AC-coupled LGADs, also known as AC-LGADs, are therefore considered as candidates for future detectors to provide 4-dimensional measurements in a single sensing device with 100$\%$ fill factor. This article presents the first characterization of an AC-LGAD sensor with a proton beam of 120 GeV momentum at Fermilab. The sensor consists of strips with 80 $\mu$m width, fabricated at Brookhaven National Laboratory. The signal properties, efficiency, spatial, and time resolution are presented. The experimental results show that the time resolution of such an AC-LGAD is compatible to standard LGADs with similar gain, and that AC-LGADs can be segmented with fine pitches as standard strip or pixel detectors.

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Artur Apresyan, Wei Chen, Gabriele D'Amen, Karri Folan Di Petrillo, Gabriele Giacomini, Ryan Heller, Hakseong Lee, Sergey Los, Chang-Seong Moon, Alessandro Tricoli. 2020-06-03. Measurements of an AC-LGAD strip sensor with a 120 GeV proton beam. https://doi.org/10.1088/1748-0221/15/09/p09038

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