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    Radiation Campaign of HPK Prototype LGAD sensors for the High-Granularity Timing Detector (HGTD)

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    We report on the results of a radiation campaign with neutrons and protons of Low Gain Avalanche Detectors (LGAD) produced by Hamamatsu (HPK) as prototypes for the High-Granularity Timing Detector (HGTD) in ATLAS. Sensors with an active thickness of 50~μ\mum were irradiated in steps of roughly 2×\times up to a fluence of 3×1015 neqcm−23\times10^{15}~\mathrm{n_{eq}cm^{-2}}. As a function of the fluence, the collected charge and time resolution of the irradiated sensors will be reported for operation at −30∘-30^{\circ}
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