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

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arxiv 2408.12744 v2 pith:F435LSAK submitted 2024-08-22 physics.ins-det hep-ex

classification physics.ins-dethep-ex
keywords h-siclgadsavalanchechargecompareddetectorsdiodesgain
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abstract

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 SiO$_2$ 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 $^{210}_{84}\rm{Po}$ 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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Time Resolution Characterization of 4H-SiC LGADs with a ${}^{90}$Sr Source

    physics.ins-det 2025-09 conditional novelty 6.0 of 10

    4H-SiC LGADs achieve 61 ps time resolution with 90Sr beta particles, comparable to Si LGADs, with limited collected charge identified as the current bottleneck.

  2. Impact of Proton Irradiation on 4H-SiC Low Gain Avalanche Detectors (LGADs)

    physics.ins-det 2025-07 conditional novelty 6.0 of 10

    Proton irradiation reduces the gain and rectification of 4H-SiC LGADs through gain-layer compensation and defect-limited impact ionization, yet the devices remain operational at fluences up to 3.33e14 p/cm2.

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