We present the first beam test results with centimeter-scale AC-LGAD strip sensors, using the Fermilab Test Beam Facility and sensors manufactured by the Brookhaven National Laboratory. Sensors of this type are envisioned for applications that require large-area precision 4D tracking coverage with economical channel counts, including timing layers for the Electron Ion Collider (EIC), and space-based particle experiments. A survey of sensor designs is presented, with the aim of optimizing the electrode geometry for spatial resolution and timing performance. Several design considerations are discussed towards maintaining desirable signal characteristics with increasingly larger electrodes. The resolutions obtained with several prototypes are presented, reaching simultaneous 18 μm and 32 ps resolutions from strips of 1 cm length and 500 μm pitch. With only slight modifications, these sensors would be ideal candidates for a 4D timing layer at the EIC.

First survey of centimeter-scale AC-LGAD strip sensors with a 120 GeV proton beam

Tracking detectors are of vital importance for collider-based high energy physics (HEP) experiments. The primary purpose of tracking detectors is the precise reconstruction of charged particle trajectories and the reconstruction of secondary vertices. The performance requirements from the community posed by the future collider experiments require an evolution of tracking systems, ne-cessitating the development of new techniques, materials and technologies in order to fully exploit their physics potential. In this article we summarize the discussions and conclusions of the 2022 Snowmass Instrumentation Frontier subgroup on Solid State and Tracking Detectors (Snowmass IF03).

2022 Report of the Topical Group on Solid State Detectors and Tracking for Snowmass 2021

1Fermi National Accelerator Laboratory, Batavia, IL 60510, USA 2CERN, Conseil Européen pour la Recherche Nucléaire, 1211 Geneva 23, Switzerland 3SLAC National Accelerator Laboratory; Menlo Park, California 94025, USA 4Fondazione Bruno Kessler, Trento, Italy 5Brookhaven National Laboratory, Upton, 11973, NY, USA 6Istituto Nazionale Fisica Nucleare, Sezione di Cagliari, Cagliari, Italy 7SCIPP, University of California Santa Cruz, Santa Cruz, CA 95064, USA 8Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany 9University of Illinois at Chicago, Chicago, IL 60607, USA

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