Speaker
Description
This work reinterprets “noise” in cosmic-ray imaging, showing that PoCA points outside the traditional volume of interest carry valuable physical information. Analysis of four-layer RPC data and Monte Carlo simulations with energy-weighted coordinates confirms that these points arise from muon interactions with materials above the detector, particularly the roof, producing secondary particles. Two main findings emerge: first, in the four-layer system, the first-layer records may come from secondary particles, while the lower three layers reflect true cosmic-ray trajectories; second, the roof strongly influences PoCA point distributions, with roof thickness correlating quantitatively with reconstructed points, measurable via $z$-coordinate analysis. Differences in roofing materials suggest this method could evolve into a novel tomography technique.
