AstroPix is a sensor design suitable for the
hard X-ray to gamma-rayenergy range.
Specifically, it is a
high-voltage CMOS (HVCMOS) monolithic active pixel sensor
(HVMAPS).
The technology promises to improve the capabilities of
sensors in this regime, and a number of AstroPix versions
have been developed, attempting to push designs toward
its potential.
The sensor design is useful for both ground-based particle-physics
accelerators and for space gamma-ray and X-ray observatories.
Some planned tests for the latter use are A-STEP
(for AstroPix Sounding Rocket Technology Demonstrator Payload)
and ComPair-2, a planned balloon-borne
prototype for a proposed space observatory, AMEGO-X.
The name AstroPix has also been used for an unrelated
effort that makes astronomy images available.