Characterization of 4H-SiC Low Gain Avalanche Detectors (LGADs)

Yang, Tao; Sekely, Ben; Satapathy, Yashas; Allion, Greg; Barletta, Philip; Haber, Carl; Holland, Steve; Muth, John F.; Pavlidis, Spyridon; Stucci, Stefania

doi:10.1016/j.nima.2025.170873

Characterization of 4H-SiC Low Gain Avalanche Detectors (LGADs)

Journal Article · Mon Aug 11 00:00:00 EDT 2025 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2025.170873· OSTI ID:3011020

^[1]; Sekely, Ben ^[2]; ^[2]; Allion, Greg ^[2]; Barletta, Philip ^[2]; Haber, Carl ^[1]; ^[1]; ^[2]; ^[2]; ^[3]

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
North Carolina State University, Raleigh, NC (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States)

4H-SiC Low Gain Avalanche Detectors (LGADs) have been fabricated and characterized. The devices employ a circular mesa design with low-resistivity contacts and an SiO₂ passivation layer. The I–V and C–V characteristics of the 4H-SiC LGADs are compared with complementary 4H-SiC PiN diodes to confirm a high breakdown voltage and low leakage current. Both LGADs and PiN diodes were irradiated with alpha particles from a $$^{210}_{84}$$Po source. The charge collected by each device was compared, and it was observed that low-gain charge carrier multiplication is achieved in the 4H-SiC LGAD.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); North Carolina State University, Raleigh, NC (United States)

Sponsoring Organization:: National Science Foundation (NSF); US Department of Energy; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: AC02-05CH11231; SC0024252

OSTI ID:: 3011020

Alternate ID(s):: OSTI ID: 2588534
OSTI ID: 3008161

Report Number(s):: BNL--228892-2025-JAAM

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 1082; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (14)

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