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Abstract—A Compact front-end electronics (Compact_FEC) for reading Micromegas detector is presented in this paper. It includes the detector signal readout module, data acquisition module, and power supply module. The detector signal readout module uses a current-based readout chip, ADAS1128, which integrates 128 current amplifiers for multi-channel charge information measurement. After noise test and calibration, this readout electronics was applied to readout the Micromegas detectors. X-ray with iron-55 source and cosmic ray muon tracking tests were performed to test the energy-resolved and position-resolved performance. 5.9keV X-ray test results show that the Micromegas detector has the full peak charge of 391.3 fc at 5.9 KeV-X-rays, with an energy resolution of 19.50%(FWHM). The Ar escape peak charge of 183.7 fc, with the total peak charge to escape peak ratio of 2.13:1. 5.9keV X-ray measurements are in accordance with the theoretical values. The muon tracking test results for the detector X-dimension spatial resolution of 0.240 mm, Y-dimension spatial resolution of 0.243 mm. The results of the test show that the readout electronics can measure the track of the cosmic ray muon. In summary, the front-end electronics (Compact_FEC), in single-particle measurement mode, can measure signals from the Micromegas detector.
Index Terms — Current amplifiers, Micromegas detector, Readout electronics
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