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Leakage current simulations of Low Gain Avalanche Diode with improved Radiation Damage Modeling

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arxiv 2106.15421 v2 pith:HD2FM3GU submitted 2021-06-29 physics.ins-det hep-ex

Leakage current simulations of Low Gain Avalanche Diode with improved Radiation Damage Modeling

classification physics.ins-det hep-ex
keywords lgadcurrentleakageavalanchedamagediodegainihep-ime-v1
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report precise TCAD simulations of IHEP-IME-v1 Low Gain Avalanche Diode (LGAD) calibrated by secondary ion mass spectroscopy (SIMS). Our setup allows us to evaluate the leakage current, capacitance, and breakdown voltage of LGAD, which agree with measurements' results before irradiation. And we propose an improved LGAD Radiation Damage Model (LRDM) which combines local acceptor removal with global deep energy levels. The LRDM is applied to the IHEP-IME-v1 LGAD and able to predict the leakage current well at -30 $^{\circ}$C after an irradiation fluence of $ \Phi_{eq}=2.5 \times 10^{15} ~n_{eq}/cm^{2}$. The charge collection efficiency (CCE) is under development.

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