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May 21 – 26, 2017
Beijing International Convention Center
Asia/Shanghai timezone

Signal to noise ratio of Low Gain Avalanche Detector

May 25, 2017, 3:12 PM
Room 307 (Beijing International Convention Center)

Room 307

Beijing International Convention Center

No.8 Beichen Dong Road, Chaoyang District, Beijing P. R. China 100101
oral Semiconductor detectors R4-Semiconductor detectors(6)


Prof. Guangqing Yan (Beijing Normal University)


Low gain avalanche detectors (LGAD) were attracted considerable attention as a new concept of silicon radiation detectors. These devices are based on reach‐through avalanche photodiodes and provide a moderate gain (gain~10). Compared with general avalanche photodiodes (APD), LGAD have a remarkable improvement of the signal-to-noise ratio (SNR) which makes them more suitable to detect high energy charged particles. Moreover, LGAD have good time resolution so that they can be used as sensors for tracking. In this paper, the SNR of LGAD was proved to be better than APD and PIN by theoretical methods. Our LGAD were measured. The punch-through voltage is 45V and the breakdown voltage is 65V. The gain is almost not changed with the biased voltage and temperature under the breakdown voltage. The SNR reaches the maximum 320 while the bias voltage is 64V and the gain is 4.

Primary authors

Prof. Guangqing Yan (Beijing Normal University) Mrs Guangqing Yan (Beijing Normal University)


Ms Jiali Jiang (Beijing Normal University) Mr Jian Liu (Beijing Normal University) Prof. Kun Liang (Beijing Normal University) Dr Ran He (Beijing Normal University) Prof. Ru Yan (Beijing Normal University) Dr Tianqi Zhao (Beijing Normal University) Mr Wenxuan Chen (Beijing Normal University)

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