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The performance of IHEP-NDL LGAD sensors after neutron irradiation

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arxiv 2107.03563 v1 pith:ZLTWLQD3 submitted 2021-07-08 physics.ins-det

Mengzhao Li , Yunyun Fan , Bo Liu , Han Cui , Xuewei Jia , Shuqi Li , Chengjun Yu , Xuan Yang
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Wei Wang Mingjie Zhai Tao Yang Kewei Wu Yuhang Tan Suyu Xiao Mei Zhao Xin Shi Zhijun Liang Yuekun Heng Joao Guimaraes da Costa Xingan Zhang Dejun Han Alissa Howard Gregor Kramberger
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classification physics.ins-det
keywords lgadsensorshighirradiationtimingchargecollectedneutron
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The performances of Low Gain Avalanche diode (LGAD) sensors from a neutron irradiation campaign with fluences of 0.8 x 10^15, 15 x 10^15 and 2.5 x 10^15 neq/cm2 are reported in this article. These LGAD sensors are developed by the Institute of High Energy Physics, Chinese Academy of Sciences and the Novel Device Laboratory for the High Granularity Timing Detector of the High Luminosity Large Hadron Collider. The timing resolution and collected charge of the LGAD sensors were measured with electrons from a beta source. After irradiation with a fluence of 2.5 x 10^15 neq/cm2, the collected charge decreases from 40 fC to 7 fC, the signal-to-noise ratio deteriorates from 48 to 12, and the timing resolution increases from 29 ps to 39 ps.

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  1. Properties of carbon-infused silicon LGAD devices after non-uniform irradiation with 24 GeV/c protons

    physics.ins-det 2024-12 conditional novelty 6.0 of 10

    First IV/CV measurements of carbon-infused LGAD sensors after non-uniform 24 GeV/c proton irradiation up to 1e16 p/cm2 show a common operating voltage may remain viable despite a roughly tenfold dose gradient.

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