Development of new large area Micromegas detector and its ToRA ASIC-based readout electronics for AMBER experiment at CERN

As part of the extensive upgrade program of the Apparatus for Mesons and Baryon Experimental Research (AMBER, NA66) spectrometer a resistive bulk MICRO-MEsh-GAseous Structure (micromegas) detectors with an active area of 1 x 0 . 5 m 2 has been selected for the replacement of some Multi-Wires Proportional Chambers. This detector will be made out of three independent modules. Each micromegas detector has two readout planes in a face-to-face configuration and a common cathode providing an XUV measurement. For the lateral modules a uniform 10 Ω / cm 2 Diamond-Like Carbon (DLC) layer was chosen. The production of the first detector was completed in October 2024 and the test campaign is underway. The first module under test is presently the largest resistive bulk MM in operation. Leveraging results gained from prior tests of smaller MM prototype a new 64-channel mixed-signal front-end Application Specific Integrated Circuit (ASIC) for time and energy measurements is under development at INFN Sezione di Torino. The ongoing work on the detector and on the front-end electronics based on the new ToRA (Torino Readout for AMBER) ASIC, is presented.