The Compton-Pair telescope: A prototype for a next-generation MeV $γ$-ray observatory

Kavli Affiliate: Sven Herrmann

| First 5 Authors: Janeth Valverde, Nicholas Kirschner, Zachary Metzler, Lucas D. Smith, Nicholas Cannady

| Summary:

The Compton Pair (ComPair) telescope is a prototype that aims to develop the
necessary technologies for future medium energy gamma-ray missions and to
design, build, and test the prototype in a gamma-ray beam and balloon flight.
The ComPair team has built an instrument that consists of 4 detector
subsystems: a double-sided silicon strip detector Tracker, a novel
high-resolution virtual Frisch-grid cadmium zinc telluride Calorimeter, and a
high-energy hodoscopic cesium iodide Calorimeter, all of which are surrounded
by a plastic scintillator anti-coincidence detector. These subsystems together
detect and characterize photons via Compton scattering and pair production,
enable a veto of cosmic rays, and are a proof-of-concept for a space telescope
with the same architecture. A future medium-energy gamma-ray mission enabled
through ComPair will address many questions posed in the Astro2020 Decadal
survey in both the New Messengers and New Physics and the Cosmic Ecosystems
themes. In this contribution, we will give an overview of the ComPair project
and steps forward to the balloon flight.

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