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First operation and performance of a 200 lt double phase LAr LEM-TPC with a 40 × 76 cm<sup>2</sup>readout

First operation and performance of a 200 lt double phase LAr LEM-TPC with a 40 × 76 cm<sup>2</sup>readout

In this paper we describe the design, construction, and operation of a first large area double-phase liquid argon Large Electron Multiplier Time Projection Chamber (LAr LEM-TPC). The detector has a maximum drift length of 60 cm and the readout consists of a 40 × 76 cm2 LEM and 2D projective …