Figure 1

Colour online: Simplified layout with respect to the ALICE interaction point (IP2) (not to scale) of the neutron (ZN), proton (ZP), and two electromagnetic (ZEM) calorimeters. The approximate positions of a dipole magnet (D1) and quadruple magnets (Q1, Q2, and Q3) are also shown. A view towards the forward surface of the ZN and ZP (A--A) shows typical distributions of entry points of forward nucleons obtained in Monte Carlo modelling. The longitudinal dimensions of ZN and ZP are shown in a simplified three-dimensional (3D) scheme.