Speaker
Description
A simulation study is presented examining the impact of increasing pixel granularity in the silicon-tungsten electromagnetic calorimeter for the Future Circular Collider (FCC-ee). Starting from the baseline CLD detector geometry, the pixel pitch is systematically varied from 500 µm down to 25 µm and the effects on photon energy resolution are evaluated. Finer pixelization increases power consumption and necessitates active cooling; accordingly, silicon pads are modeled as Monolithic Active Pixel Sensors (MAPS) with a 12 µm epitaxial layer, 50 µm total sensor thickness, and digital readout. Comparative performance metrics, including photon energy resolution and the stochastic and constant terms, are presented with and without integrated cooling for fixed pixel pitch, quantifying the trade-off between improved granularity and thermal management requirements for detector optimization.
