Sealed operation, and circulation and purification of gas in the HARPO TPC

Abstract

HARPO is a time projection chamber (TPC) demonstrator of a gamma-ray telescope and polarimeter in the MeV-GeV range, for a future space mission. We present the evolution of the TPC performance over a five month sealed-mode operation, by the analysis of cosmic-ray data, followed by the fast and complete recovery of the initial gas properties using a lightweight gas circulation and purification system.

arXiv commentProceedings_MPGD2015, EPJ Web of Conferences

References in corpus (5)

• The Fermi Large Area Telescope On Orbit: Event Classification, Instrument Response Functions, and Calibration
• Polarimetry of cosmic gamma-ray sources above e+e- pair creation threshold
• TPC in gamma-ray astronomy above pair-creation threshold
• HARPO - A Gaseous TPC for High Angular Resolution Gamma-Ray Astronomy and Polarimetry from the MeV to the TeV
• HARPO: beam characterization of a TPC for gamma-ray polarimetry and high angular-resolution astronomy in the MeV-GeV range

Cited by in corpus (2)

• Performance measurement of HARPO: a Time Projection Chamber as a gamma-ray telescope and polarimeter
• $\gamma$-ray polarimetry with conversions to $e^{+}{e}^{-}$ pairs: polarization asymmetry and the way to measure it