Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 76: Silicon Detectors VII
T 76.3: Talk
Thursday, March 19, 2026, 16:45–17:00, KH 01.022
Characterization of the AstroPix v3 HVMAPS — Lennart Huth1, •Stephan Lachnit1, Richard Leys2, Elizaveta Sitnikova1, Simon Spannagel1, and Nicolas Striebig2 — 1Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 2Karlsruher Institut für Technologie KIT, Karlsruhe, Germany
AstroPix is a High-Voltage Monolithic Active Pixel Sensor (HVMAPS) designed for space-based medium-energy gamma-ray observatories like NASA’s AMEGO-X. It aims to deliver a dynamic range from 25 to 700 keV with an energy resolution of 10 % at 122 keV. To achieve a high quantum efficiency, full depletion of the sensor is essential. Due to power and cooling restrictions in space, the power consumption of the sensor is limited to less than 1.5 mW/cm2.
The third iteration of the sensor (AstroPix v3) consists of a 35×35 pixel matrix with a pixel pitch of 500 µm. It has been characterized at the DESY II Test Beam Facility in order to evaluate the detection efficiency, spatial resolution and depletion depth of the sensor using charged particles.
In this contribution, laboratory measurements and first results of this test beam campaign will be shown.
Keywords: MAPS; HVMAPS; pixel; testbeam