Speaker
Description
The Time Projection Chamber (TPC) can provide accurate measurement of the three-dimensional trajectory of charged particles and distinguish between low object mass particles and dE/dx, so it is widely used in high-energy particle physics experiments. For example, in the Ring Positron Collider (CEPC) experiment, TPC became the detector of choice for the main track detector. In order to achieve a 100-microns track resolution, TPC typically uses smaller readout pads, resulting in a dramatic increase in readout electronics density and channel count.
To meet the stringent demands on high rate and PID, pixel TPC is essential for CEPC tracking system. An interposer-based pixel readout for CEPC TPC has been proposed and a demonstrator of 500um x 500um pixels was developed, together with a multi-channel readout ASIC – TEPIX. TEPIX consists of 128 channels and each channel contains a CSA, a CDS, a 14-bit Wilkinson ADC and a 14-bit TOA. TEPIX works at a frame sampling mode and can provide information of charged particles, including time and energy. The power consumption of TEPIX is less than 0.5 mW/ch. The tested ENC is about 300e @0pF. This talk carries out the development and test results of interposer-based pixel readout to meet the high-density readout requirements of TPC detectors.
