Characterization of BNL and HPK AC-LGAD sensors with a 120 GeV proton beam

Abstract

We present measurements of AC-LGADs performed at the Fermilab's test beam facility using 120 GeV protons. We studied the performance of various strip and pad AC-LGAD sensors that were produced by BNL and HPK. The measurements are performed with our upgraded test beam setup that utilizes a high precision telescope tracker, and a simultaneous readout of up to 7 channels per sensor, which allows detailed studies of signal sharing characteristics. These measurements allow us to assess the differences in designs between different manufacturers, and optimize them based on experimental performance. We then study several reconstruction algorithms to optimize position and time resolutions that utilize the signal sharing properties of each sensor. We present a world's first demonstration of silicon sensors in a test beam that simultaneously achieve better than 6-10 micron position and 30 ps time resolution. This represents a substantial improvement to the spatial resolution than would be obtained with binary readout of sensors with similar pitch.

References in corpus (4)

• Resistive AC-Coupled Silicon Detectors: principles of operation and first results from a combined analysis of beam test and laser data
• Measurements of an AC-LGAD strip sensor with a 120 GeV proton beam
• First application of machine learning algorithms to the position reconstruction in Resistive Silicon Detectors
• Combined analysis of HPK 3.1 LGADs using a proton beam, beta source, and probe station towards establishing high volume quality control

Cited by in corpus (4)

• 4D Tracking: Present Status and Perspective
• Optimization of capacitive coupled Low Gain Avalanche Diode (AC-LGAD) sensors for precise time and spatial resolution
• First survey of centimeter-scale AC-LGAD strip sensors with a 120 GeV proton beam
• The performance of large-pitch AC-LGAD with different N+ dose