arxiv: 1503.03772 · v1 · pith:IB7WHCTDnew · submitted 2015-03-12 · 🌌 astro-ph.IM · physics.ins-det

HARPO: beam characterization of a TPC for gamma-ray polarimetry and high angular-resolution astronomy in the MeV-GeV range

Shaobo Wang , Denis Bernard , Philippe Bruel , Mickael Frotin , Yannick Geerebaert , Berrie Giebels , Philippe Gros , Deirdre Horan

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Marc Louzir Patrick Poilleux Igor Semeniouk David Atti\'e Denis Calvet Paul Colas Alain Delbart Patrick Sizun Diego G\"otz Sho Amano Takuya Kotaka Satoshi Hashimoto Yasuhito Minamiyama Akinori Takemoto Masashi Yamaguchi Shuji Miyamoto Schin Dat\'e Haruo Ohkuma

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keywords harpobeamexcellentmev-gevrangeangularangular-resolutionargon

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A time projection chamber (TPC) can be used to measure the polarization of gamma rays with excellent angular precision and sensitivity in the MeV-GeV energy range through the conversion of photons to e+e- pairs. The Hermetic ARgon POlarimeter (HARPO) prototype was built to demonstrate this concept. It was recently tested in the polarized photon beam at the NewSUBARU facility in Japan. We present this data-taking run, which demonstrated the excellent performance of the HARPO TPC.

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HARPO: beam characterization of a TPC for gamma-ray polarimetry and high angular-resolution astronomy in the MeV-GeV range

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