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

Sayuka Kita; Koji Nakamura; Tatsuki Ueda; Ikumi Goya; Kazuhiko Hara

doi:10.1016/j.nima.2022.168009

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

Instrumentation and Detectors 2023-01-25 v1 High Energy Physics - Experiment

Authors: Sayuka Kita , Koji Nakamura , Tatsuki Ueda , Ikumi Goya , Kazuhiko Hara

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Abstract

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.

Keywords

ac-lgad sensor optimization time resolution spatial resolution doping concentration radiation tolerance particle detection

Cite

@article{arxiv.2207.07355,
  title  = {Optimization of capacitive coupled Low Gain Avalanche Diode (AC-LGAD) sensors for precise time and spatial resolution},
  author = {Sayuka Kita and Koji Nakamura and Tatsuki Ueda and Ikumi Goya and Kazuhiko Hara},
  journal= {arXiv preprint arXiv:2207.07355},
  year   = {2023}
}

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11 pages, 25 figures, Submitted to Nuclear Instruments & Methods in physics research A (NIMA)

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

Abstract

Keywords

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