Fabrication and performance of AC-coupled LGADs
Abstract
Detectors that can simultaneously provide fine time and spatial resolution have attracted wide-spread interest for applications in several fields such as high-energy and nuclear physics as well as in low-energy electron detection, photon science, photonics and imaging. Low-Gain Avalanche Diodes (LGADs), being fabricated on thin silicon substrates and featuring a charge gain of up to 100, exhibit excellent timing performance. Since pads much larger than the substrate thickness are necessary to achieve a spatially uniform multiplication, a fine pad pixelation is difficult. To overcome this limitation, the AC-coupled LGAD approach was introduced. In this type of device, metal electrodes are placed over an insulator at a fine pitch, and signals are capacitively induced on these electrodes. At Brookhaven National Laboratory, we have designed and fabricated prototypes of AC-coupled LGAD sensors. The performance of small test structures with different particle beams from radioactive sources are shown.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1571434
- Report Number(s):
- BNL-212212-2019-JAAM
Journal ID: ISSN 1748-0221; TRN: US2001292
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Instrumentation
- Additional Journal Information:
- Journal Volume: 14; Journal Issue: 09; Journal ID: ISSN 1748-0221
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; solid state detectors; timing detectors; charge transport and multiplication in solid media; detector modelling and simulations II; electric fields; charge transport; multiplication and induction; pulse formation; electron emission
Citation Formats
Giacomini, Gabriele, Chen, W., D'Amen, G., and Tricoli, A. Fabrication and performance of AC-coupled LGADs. United States: N. p., 2019.
Web. doi:10.1088/1748-0221/14/09/P09004.
Giacomini, Gabriele, Chen, W., D'Amen, G., & Tricoli, A. Fabrication and performance of AC-coupled LGADs. United States. https://doi.org/10.1088/1748-0221/14/09/P09004
Giacomini, Gabriele, Chen, W., D'Amen, G., and Tricoli, A. Mon .
"Fabrication and performance of AC-coupled LGADs". United States. https://doi.org/10.1088/1748-0221/14/09/P09004. https://www.osti.gov/servlets/purl/1571434.
@article{osti_1571434,
title = {Fabrication and performance of AC-coupled LGADs},
author = {Giacomini, Gabriele and Chen, W. and D'Amen, G. and Tricoli, A.},
abstractNote = {Detectors that can simultaneously provide fine time and spatial resolution have attracted wide-spread interest for applications in several fields such as high-energy and nuclear physics as well as in low-energy electron detection, photon science, photonics and imaging. Low-Gain Avalanche Diodes (LGADs), being fabricated on thin silicon substrates and featuring a charge gain of up to 100, exhibit excellent timing performance. Since pads much larger than the substrate thickness are necessary to achieve a spatially uniform multiplication, a fine pad pixelation is difficult. To overcome this limitation, the AC-coupled LGAD approach was introduced. In this type of device, metal electrodes are placed over an insulator at a fine pitch, and signals are capacitively induced on these electrodes. At Brookhaven National Laboratory, we have designed and fabricated prototypes of AC-coupled LGAD sensors. The performance of small test structures with different particle beams from radioactive sources are shown.},
doi = {10.1088/1748-0221/14/09/P09004},
journal = {Journal of Instrumentation},
number = 09,
volume = 14,
place = {United States},
year = {Mon Sep 02 00:00:00 EDT 2019},
month = {Mon Sep 02 00:00:00 EDT 2019}
}
Web of Science
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