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arXiv · 1810.05856

Characterization of FBK small-pitch 3D diodes after neutron irradiation up to 3.5x10**16 neq cm**-2

Roberto Mendicino·Maurizio Boscardin·Gian-Franco Dalla Betta
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Abstract

We report on the characterization by a position resolved laser system of small-pitch 3D diodes irradiated with neutrons up to an extremely high fluence of 3.5x10**16 neq cm**-2. We show that very high values of signal efficiency are obtained, in good agreement with the geometrical expectation based on the small values of the inter-electrode spacings, and also boosted by charge multiplication effects at high voltage. These results confirm the very high radiation tolerance of small-pitch 3D sensors well beyond the maximum fluences expected at the High Luminosity LHC.

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Roberto Mendicino, Maurizio Boscardin, Gian-Franco Dalla Betta. 2018-10-13. Characterization of FBK small-pitch 3D diodes after neutron irradiation up to 3.5x10**16 neq cm**-2. https://doi.org/10.1088/1748-0221%2F14%2F01%2Fc01005

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