Determination of through-going tracks’ direction by means of δ-rays in the ICARUS liquid argon time projection chamber
2000
Abstract We exploited the crossing muon data, collected in the 50 l liquid argon TPC exposed at the CERN neutrino beam in 1997, to investigate the possibility of identitying the direction of minimum ionizing particle tracks relying only on δ-rays orientation. In this note we show that simple selection criteria allow using δ-rays down to very low energy (few MeV) with high efficiency and no misidentification of their direction. The Monte Carlo prediction – two recognized δ-rays per meter of track – is very well matched by the result of the scanning of the experimental data.
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