HARPO: a TPC as a gamma-ray telescope and polarimeter

Denis Bernard , Philippe Bruel , Mickael Frotin , Yannick Geerebaert , Berrie Giebels , Philippe Gros , Deirdre Horan , Marc Louzir

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Patrick Poilleux Igor Semeniouk Shaobo Wang Shebli Anvar David Atti\'e Paul Colas Alain Delbart Patrick Sizun Diego G\"otz

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classification 🌌 astro-ph.IM physics.ins-det

keywords gamma-rayphotonangular-precisionastronomybeamchamberconversiondemonstrator

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A gas Time Projection Chamber can be used for gamma-ray astronomy with excellent angular-precision and sensitivity to faint sources, and for polarimetry, through the measurement of photon conversion to $e^+e^-$ pairs. We present the expected performance in simulations and the recent development of a demonstrator for tests in a polarized photon beam.

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HARPO: a TPC as a gamma-ray telescope and polarimeter

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