491460.fig.002a
(a) Early high-
491460.fig.002b
(b) Nominal high-
Figure 2: The geometrical acceptance of the ALFA detector as a function of the proton energy loss ( ) and its transverse momentum ( ) for two LHC settings. The distance between the beam centre and the detector edge was set to 4 mm for early high- and to 1.5 mm for nominal high- .