Speaker
Description
AstroPix is a high-voltage CMOS (HV-CMOS) monolithic silicon sensor originally developed to enable precision gamma-ray imaging and spectroscopy in the medium-energy regime (~100 keV–100 MeV) based on the experience from ATLASpix and MuPix. It features a 500 µm pixel pitch, on-pixel amplification and digitization, and low power consumption (~1.5 mW/cm²), making it scalable for large-area, multilayer telescope detector planes. The detectors have a designed dynamic range of 25 keV to 700 keV.
With these features, AstroPix meets the requirements of both the multilayer telescope detectors for space missions and the imaging layers of the Barrel Imaging Calorimeter (BIC) in the ePIC detector at the future Electron-Ion Collider (EIC). For the space-based payload, AstroPix is being integrated into sounding rocket and balloon payloads as more demonstrations of the utility of the devices. For BIC, AstroPix-based imaging layers interleaved within the lead/scintillating-fiber (Pb/SciFi) sampling calorimeter provide fine-grained shower imaging, enabling key performance features such as electron/pion or gamma/pion separation.
As part of the ongoing detector R&D efforts, we have been testing various AstroPix version 3 configurations: the single chip, a quad-chip assembly, a three-layer stack of quad chips, and a 9-chip PCB module that represents the smallest prototype unit of the imaging layer. This presentation will highlight recent performance test results from these AstroPix detector configurations.
