Abstract
This paper presents the design and test of the readout electronics for Micromegas detector, which is developed for the future CEPC-TPC tracking system. The front-end electronics is based on the VMM3 chip, a 64-channel ASIC with high resolution of charge and time, which has been used in the readout system of both the Micromegas and sTGC detectors in the New Small Wheels Upgrade project. The test results show that the charge resolution and time resolution of the readout electronics connected to the Micromegas-TPC detector are measured to be 1.19 fC and 2.20 ns, respectively, and the position resolution and time resolution of the Micromegas-TPC detector are determined to be 142 μm and 18.4 ns, respectively.
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