Abstract
The HARP experiment, at the CERN Proton Synchrotron, measures hadron production cross sections of protons of known momenta (1.5 - 15 GeV/c) impinging on different solid and liquid targets. The HARP TPC provides tracking and particle identification. It is a cylindrical 3D imaging chamber which surrounds the experimental target hit by an extracted beam. The first calibration run was completed and preliminary detector performances for X-rays energy resolution, momentum and d E / d x resolution were evaluated. The preliminary results of an analysis of elastic scattering using a H 2 target completes the evaluation of TPC performance.
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