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Full Sensor Efficiency Sub-Pixel Efficiency (4x4) Resolution / Pixel Uniformity

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Testbeam Measurements for the Mu3e Experiment

Moritz Kiehn¹ on behalf of the Mu3e Collaboration

1) Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany

Testing a HV-MAPS Pixel Sensor Prototype

Full Sensor Efficiency Sub-Pixel Efficiency (4x4) Resolution / Pixel Uniformity

Te st be am S et up a t D ES Y Te st be am R es ul ts

● First working prototype

● High efficiency ~ 99% almost everywhere

● Small non-uniformity due to non-optimal tuning

● Efficiencies folded to 4x4 submatrix

● No visible Substructure

● Small inefficiencies at pixel edges / corners

● Resolution as predicted by size of a single pixel (gray markers)

● Uniform response

Aconite Beam Telescope and MuPix4 Prototype

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