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Low Gain Avalanche Detectors (LGADs) with excellent time resolution are essential for future collider experiments like the HL-LHC. However, proton-induced radiation damage at HL-LHC may degrade gain/charge collection due to trap defects and the Acceptor Removal Mechanism (ARM). We investigated these effects, along with impact ionization, for a neutron-equivalent proton fluence of \(4.30 \times 10^{14}\) \(\text {1 MeV} \ n_{\text {eq}} \ \text {cm}^{-2} \) using TCAD simulations. Additionally, we parameterized Selberherr’s impact ionization model based on proton fluence to match the measured gain. Optimization of the model parameters is crucial for assessing LGAD performance under HL-LHC irradiation and for developing radiation-hard LGADs for future collider experiments.

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TCAD Simulation Study to Understand the Behaviour of Proton Irradiated Thin LGADs

  • 会议论文

  • 发表日期：

    2025年

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  • Rajiv Gupta,
  • Sunidhi Saxena,
  • Chakresh Jain,
  • Kalpna Tiwari,
  • Rahul Sharma,
  • Namrata Agrawal,
  • Ashutosh Bhardwaj,
  • Kirti Ranjan,
  • Ajay Kumar

摘要

Low Gain Avalanche Detectors (LGADs) with excellent time resolution are essential for future collider experiments like the HL-LHC. However, proton-induced radiation damage at HL-LHC may degrade gain/charge collection due to trap defects and the Acceptor Removal Mechanism (ARM). We investigated these effects, along with impact ionization, for a neutron-equivalent proton fluence of \(4.30 \times 10^{14}\) \(\text {1 MeV} \ n_{\text {eq}} \ \text {cm}^{-2} \) using TCAD simulations. Additionally, we parameterized Selberherr’s impact ionization model based on proton fluence to match the measured gain. Optimization of the model parameters is crucial for assessing LGAD performance under HL-LHC irradiation and for developing radiation-hard LGADs for future collider experiments.