Speaker
Description
Recent developments in resistive Micromegas detectors have demonstrated excellent performance, stability and robustness in high-rate environments, making them strong candidates for future collider experiments. Leveraging these developments, we investigate a novel readout concept based on capacitive charge sharing, aimed at improving spatial resolution while significantly reducing the number of electronic channels. Such an approach is particularly well suited to experiments with moderate to low particle rates, such as muon systems at FCC-ee, where high spatial resolution, long-term stability, simplicity of implementation, and cost-effectiveness are key requirements.
The detector architecture employs a resistive layer coupled to a multi-layer PCB implementing several layers of pads with increasing dimensions. The signal induced by the avalanche is distributed across the layers of pads with increasing size. Only the last layer is instrumented for readout. This configuration enables controlled charge sharing among neighbouring channels, allowing precise position reconstruction through charge interpolation. The concept has been demonstrated through the successful construction of several prototypes, the impact of different numbers of capacitive-sharing layers and various readout geometries has been investigated. Scalability has been proven with the construction of large-area detectors with active dimensions of 40 × 50 cm².
We present results from test-beam measurements with these detectors, focusing on spatial resolution, efficiency, and time response, and highlighting their dependence on the different detector configurations.
The results demonstrate that capacitive charge sharing in resistive Micromegas offers a promising and scalable path toward high-precision, large-area tracking detectors for next-generation collider experiments.
| Name of the speaker | Kacper Chmiel |
|---|---|
| Eligible for the Georges Charpak Young Scientist Award. | yes |