Abstract
We present results of irradiation tests performed in the pion beam of the Paul Scherrer Institute. Our results confirm the prediction, that the Δ-resonance is reflected as an enhancement of the damage caused by low energy pions. At the peak of the Δ-resonance we measure a damage constant 1.5 times higher than generally adopted for neutrons and high energy protons. This result means that the lifetime of silicon detectors close to the vertex at LHC experiments will be limited by the pion background. We predict type inversion of high resistivity detectors to occur after two months of full luminosity and the depletion voltage to reach 200 V within the first four years, even if the detectors are operated at 0°C.
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Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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