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Description
This work investigates the performance of Low Gain Avalanche Detectors (LGADs) developed by the Institute of High Energy Physics (IHEP) with different carbon implantation schemes. To characterize sensor behavior, systematic measurements of capacitance, leakage current, temporal resolution, and charge collection were performed. Radiation hardness was assessed through neutron irradiation up to a fluence of 2.5× 1015neq/cm2. The results demonstrate that both shallow and deep carbon implantation contribute to enhanced radiation hardness, although their impacts on sensor performance are not entirely identical. Nevertheless, increasing the carbon dose in deep implantation configurations results in performance degradation, as evidenced by capacitance and beta source measurements. These findings provide new insights into the optimization of carbon implantation for radiation-hardened LGAD design and contribute to a broader understanding of design strategies for radiation-hardened detectors.
