Structure of the main chamber and readout PCB. (IMAGE)

Nuclear Science and Techniques

Structure of the main chamber and readout PCB.

Caption

The figure illustrates the core components of the INPC-TPC main chamber, including a gas distribution system, field cage, Gas Electron Multiplier (GEM), readout PCB, and preamplifier array. The aluminum housing ensures mechanical stability and gas tightness (up to 5 atm) while providing electromagnetic shielding to reduce signal noise. The field cage, composed of cross-arranged copper rings, achieves a uniform electric field via series voltage division. The readout PCB (diameter 560 mm) is equipped with 4608 hexagonal readout pads (2 mm diameter, 125 µm spacing), and the dual-GEM configuration enables submillimeter spatial resolution (122 µm in the X-Y plane) and stable gain.

Credit

Jia-Jun Zhang

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License

CC BY-NC

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