Performance Studies of the ATLASpix HV-MAPS Prototype for Different Substrate Resistivities

TL;DR

This paper presents laboratory and test-beam results on the ATLASpix HV-MAPS prototype, focusing on energy calibration and charge collection depth to evaluate its suitability for high-energy physics detectors.

Contribution

It provides new calibration and charge collection data for the ATLASpix HV-MAPS prototype across different substrate resistivities, advancing detector performance understanding.

Findings

Energy calibration results from fluorescence X-ray measurements.

Charge collection depth determined from inclined track test-beam studies.

Performance insights for HV-MAPS in high-energy physics applications.

Abstract

The ATLASpix high-voltage monolithic active pixel sensor (HV-MAPS) was designed as a technology demonstrator for the ATLAS ITk Upgrade and the CLIC tracking detector. In this contribution new results from laboratory-based energy calibration measurements using fluorescence X-rays are presented for the ATLASpix Simple matrix. These findings are complemented by new results from test-beam studies with inclined tracks, in which the active charge collection depth is determined.