Abstract

Heavy hadron irradiation leads to type inversion of n-type silicon detectors. After type inversion, the charge collected at low bias voltages by silicon microstrip detectors is higher when read out from the n-side compared to p-side read out. The n-side read out has been successfully used in combination with oxygen-enriched n-type silicon substrate to maximise the radiation hardness of microstrip detectors. Alternatively, the n-side read out can be implemented on p-type substrates reducing the complexity of fabrication. Miniature silicon microstrip detectors made on standard and oxygen-enriched p-type substrate have been produced. The charge collection properties of such detectors with and without oxygenation are here compared for the first time after severe charged hadron irradiation.

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