Optimization of capacitive coupled Low Gain Avalanche Diode (AC-LGAD) sensors for precise time and spatial resolution

Capacitive-coupled Low-Gain Avalanche Diode (AC-LGAD) sensors are being developed for high-energy particle physics experiments as a detector which provides fast time information with fine spatial resolution. This paper describes optimizations of AC-LGAD sensor fabrication parameters, such as doping...

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Bibliographic Details
Published in:arXiv.org 2022-07
Main Authors: Kita, Sayuka, Nakamura, Koji, Ueda, Tatsuki, Goya, Ikumi, Hara, Kazuhiko
Format: Article
Language:English
Subjects:
Avalanche diodes
Crosstalk
Electrodes
Optimization
Particle physics
Radiation tolerance
Sensors
Spatial resolution
Online Access:Get full text
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Summary:Capacitive-coupled Low-Gain Avalanche Diode (AC-LGAD) sensors are being developed for high-energy particle physics experiments as a detector which provides fast time information with fine spatial resolution. This paper describes optimizations of AC-LGAD sensor fabrication parameters, such as doping concentrations of the gain and electrode layers as well as the AC insulator capacitance, to realize \(\mathcal{O}\)(10)~\um{} spacial resolution, small charge cross talk to the neighboring electrodes, detection efficiency higher than 99\% at a 10\(^{-4}\) fake rate and time resolution of about 30~ps. The radiation tolerance of the sensor is presented. In addition, further application to a device capable of visible and infra-red light detection is discussed.
ISSN:2331-8422
DOI:10.48550/arxiv.2207.07355