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A Time Projection Chamber (TPC) for use as an active target has been developed. The TPC is used for nuclear experiments using unstable nuclear beam and is intended to measure a recoil nucleus in forward scattering whose energy is very small. It is designed to have two field cages and beams pass between the cages in order to decrease distortion of the electric field inside the TPC due to the ions created...
We developed a prototype time projection chamber using gas electron multipliers (GEM–TPC) for high energy heavy ion collision experiments. To investigate its performance, we conducted a beam test with three kinds of gases (Ar(90%)–CH 4 (10%), Ar(70%)–C 2 H 6 (30%) and CF 4 ). Detection efficiency of 99%, and spatial resolution of 79μm in the pad-row direction and 313μm...
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