Performance of TPC detector for the double β-decay experiment

Abstract A Large Time Projection Chamber (TPC) in a magnetic field designed to search for neutrinoless double β -decay of different isotopes is now operational. The TPC construction, high voltage drift supply, multiwire detectors, gas system is described. The first tracks from cosmic muons and background electrons have been obtained. Our goal is two neutrino double β -decay of 136 Xe.