Resistive high granularity Micromegas for future detectors

Abstract This paper highlights recent progress in developing innovative Micromegas detectors for future collider experiments, designed for precision tracking and muon systems, with a particular focus on scalability and robust performance. The core technology involves single-stage resistive Micromega detectors, with pad readout and spark protection layout implemented through various schemes and integration strategies, tailored to optimize performance under different conditions. These detectors offer a compelling combination of high-rate operation (up to 10 MHz/cm 2 ), excellent spatial resolution (below 100 μm), and good timing resolution (approximately 5 ns). Fast charge evacuation and pad readout, with granularity on the mm 2   scale, underpins this performance. Large-area prototypes with active dimensions reaching 50 × 40 cm 2 have recently been successfully produced and tested, marking a major milestone. Their tests have confirmed the technology's uniformity, robustness, and high-rate capabilities across increasing detector sizes, also demonstrating its suitability for the large-area coverage required in future high-energy physics applications. A key advantage of this technology is the adaptability of the performance parameters to meet diverse experimental needs. This includes configurations for high-precision tracking as well as more cost-effective solutions with reduced granularity, such as those anticipated for FCC-ee, where the charge capacitive-sharing technique can significantly reduce readout channel count while maintaining adequate precision. Comprehensive results from measurements conducted on large-area modules and on the capacitive sharing technique are reported.