Speaker
Description
The MURAVES (MUon RAdiography of VESuvius) experiment aims to investigate the internal structure of the “Great Cone”, the summit cone of Mt. Vesuvius, an active volcano near Naples, Italy. The experiment uses the muography technique with scintillator-based tracking stations installed on the volcano’s flank. Each layer of the tracking stations comprises two orthogonal planes segmented into scintillator bars read out by SiPMs, enabling directional counting and muon tracking and long-term stability monitoring. This contribution presents updated results using additional data collected since the last publications, optimised processing and improved χ2-based track-quality selection. The simulation incorporates a detailed DEM-based model of the surrounding topography to compute direction-dependent rock thickness, and a dedicated muon transport simulation based on the Mulder framework. Mulder provides a Backward Monte Carlo approach, allowing simulations starting from the detector location with a prescribed energy spectrum and particle transportation through the topography to predict the expected flux at the instrument location.
To compare data and simulation while minimizing normalization systematics, we define a per-angular-bin data-to-simulation double ratio D(ϕ,θ), defined as the time-normalized measured Vesuvius-to-freesky rate ratio divided by the corresponding simulated transmission. This observable provides a direct consistency metric and serves as an input to density evaluation across the “Great Cone”. The outcome confirms the robustness of the double ratio approach and provides a robust basis for density evaluation of the “Great Cone” in Mt. Vesuvius.