Figure 1

Configuration during the ALTEA-shield measurements. Three of the ALTEA SDUs are deployed on a flat configuration using a modular support structure that can hold four SDUs. The Digital Acquisition Unit (DAU) will be positioned in the empty space visible in Fig. 2. One SDU (n. 2, on the left) is the reference SDU, without the shielding tiles. Tiles of different thickness are positioned on the SDUs n. 1 and n. 3 (on the right, in orange).