The performance of IHEP-NDL LGAD sensors after neutron irradiation

Abstract

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.

References in corpus (5)

• Beam test results of a 16 ps timing system based on ultra-fast silicon detectors
• Radiation resistant LGAD design
• Radiation Hardness of Thin Low Gain Avalanche Detectors
• Gain and time resolution of 45 $\mu$m thin Low Gain Avalanche Detectors before and after irradiation up to a fluence of $10^{15}$ n${}_{eq}$/cm${}^2$
• Comparison of 35 and 50 μm thin HPK UFSD after neutron irradiation up to 6*10^15 neq/cm^2

Cited by in corpus (1)

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