低增益雪崩探测器的数值仿真与辐照效应研究

Abstract

Abstract: The Low Gain Avalanche Detector (LGAD) is a new type of fast timing detector designed to overcome the slow response and poor irradiation resistance of conventional silicon detectors under heavy hadron radiation. This study aims to analyze the variation of LGAD related electrical parameters under different temperature and neutron flux irradiation, including leakage current, dark count rate, transient signal, gain, etc. The physical model of LGAD is constructed by using Technology Computer Aided Design (TCAD) tool, and a new “three-trap body damage model” is introduced to study it. The results show that LGAD has better performance at low temperature. After irradiation, the leakage current increases, the dark count rate increases, the transient collection signal deteriorates and the gain decreases. The defects caused by irradiation affect the space effective charge and internal electric field of the LGAD, which can be reduced by increasing the voltage and decreasing the temperature. The effect of different temperature and irradiation on the performance of the detector obtained by this study has some guiding significance for the follow-up research and radiation hardening design of the detector.

Key words: Low Gain Avalanche Detector, TCAD simulation, neutron irradiation, radiation model

CLC Number:

TL81

ZHANG Xiangming, SUN Shifeng, ZHANG Ao. TCAD simulation and irradiation effect study on low gain avalanche detector[J].RADIATION PROTECTION, 2024, 44(3): 265-274.

References

[1] Pellegrini G, Fernández-Martínez P, Baselga M, et al. Technology developments and first measurements of Low Gain Avalanche Detectors (LGAD) for high energy physics applications[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2014, 765: 12-16.
[2] YANG Xiao, WU Kuo, ZHENG Xiangxuan, et al. Radiation hardness characterization of low gain avalanche detector prototypes for the high granularity timing detector[J]. JUSTC,2022, 52(1): 24-30+71.
[3] 陈晗.用于LGAD读出的高精度时间测量原型ASIC研究[D]. 合肥:中国科学技术大学,2022.
CHEN Han. Research of high precision time measurement prototype ASIC for the LGAD readout[D]. Hefei: University of Science and Technology of China, 2022.
[4] Kramberger G, Baselga M, Cindro V, et al. Radiation effects in Low Gain Avalanche Detectors after hadron irradiations[J]. Journal of Instrumentation, 2015, 10(7): P07006.
[5] Ranjeet Dalal, Geetika Jain, Ashutosh Bhardwaj, et al. TCAD simulation of low gain avalanche detectors[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016, 836: 113-121.
[6] Moll, Michael. Displacement damage in silicon detectors for high energy physics[J]. IEEE Transactions on Nuclear Science, 2018, 65(8): 1561-1582.
[7] Ferrero M, Arcidiacono R, Barozzi M, et al. Radiation resistant LGAD design[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2019, 919: 16-26.
[8] Esteban Currás. Low Gain Avalanche Detectors for 4-dimensional tracking applications in severe radiation environments[C]. Proceedings of the 29th International Workshop on Vertex Detectors (VERTEX2020), 2021.
[9] Neil Moffat, Richard Bates. Simulation of the small pixel effect contributing to a low fill factor for pixellated Low Gain Avalanche Detectors (LGAD)[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2021, 1018: 165746.
[10] Esteban Currás, M. Fernández, Michael Moll. Gain reduction mechanism observed in low gain avalanche diodes[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2022, 1031: 166530.
[11] David Friday. A time-integrated analysis of Bd→ π+ π- π+ π- at LHCb and simulations for Low Gain Avalanche Detectors (LGAD)[D]. Diss: University of Glasgow, 2023.
[12] Neil Moffat. Low gain avalanche detectors for particle physics and synchrotron applications[D]. Diss: University of Glasgow, 2020.
[13] YANG Yuzhen, XIAO Suyu, Fan Yunyun, et al. Characterization of the first prototype NDL Low Gain Avalanche Detectors (LGAD)[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2021, 1011:165591.
[14] LI Mengzhao, FAN Yunyun, LIU Bo, et al. The performance of IHEP-NDL LGAD sensors after neutron irradiation[J]. Journal of Instrumentation, 2021, 16(8): P08053.
[15] WU K, ZHAO M, YANG T, et al. Design and fabrication of Low Gain Avalanche Detectors (LGAD): A TCAD simulation study[J]. Journal of Instrumentation, 2020, 15(3): C03008.
[16] TAO Yang, WU Kewei, ZHAO Mei, et al. Leakage current simulations of Low Gain Avalanche Diode with improved Radiation Damage Modeling[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2022, 1040: 167111.
[17] Passeri D, Moscatelli F, Morozzi A, et al. Modeling of radiation damage effects in silicon detectors at high fluences HL-LHC with Sentaurus TCAD[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016, 824: 443-445.
[18] XU Yux, XIANG Ping, XIE Xiaopeng. Comprehensive understanding of dark count mechanisms of single-photon avalanche diodes fabricated in deep sub-micron CMOS technologies[J]. Solid-State Electronics, 2017, 129: 168-174.
[19] LI Mengzhao, FAN Yunyun, JIA Xuewei, et al. Effects of shallow carbon and deep N++ layer on the radiation hardness of IHEP-IME LGAD sensors[J]. IEEE Transactions on Nuclear Science, 2022, 69(5): 1098-1103.
[20] LI C H, YANG X, GE J J, et al. Performance of LGAD sensors with carbon enriched gain layer produced by USTC[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2022, 1039: 167008.

TCAD simulation and irradiation effect study on low gain avalanche detector

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