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

Authors :: Frotin, M.
Gros, P.
Attié, D.
Bernard, D.
Dauvois, V.
Delbart, A.
Durand, D.
Geerebaert, Y.
Legand, S.
Magnier, P.
Poilleux, P.
Semeniouk, I.
Publication Year :: 2015
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.<br />Comment: Proceedings_MPGD2015, EPJ Web of Conferences