Abstract:
To enhance the compactness and lightness of the time projection chamber (TPC), an integrated Micromegas detector with a 128-channel two-dimensional strip-readout system was employed as its core readout component, and its working conditions and performance were investigated. The TPC features a sensitive volume of 10 cm×10 cm×8 cm, weights less than 2.5 kg, and has an avalanche region thickness of 100 μm in the detector. To ensure the TPC’s sealing while minimizing its mass, a dual nested structure with a low-mass chamber and a flange ring was designed. The incorporation of a common mode choke coil reduced noise in detector imaging, eliminating noise points and periodic noise from various signals. The TPC successfully measured the trajectories of alpha particles using a working gas mixture of 93% Ar and 7% CO
2 at a flow rate of 0.6 L/min. Test results show good agreement with simulation outcomes obtained using Geant4 software, confirming the TPC’s effective particle track detection capabilities.
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