  We show that the diffractive pp (and p\bar{p}) data (on \sigma_tot,
d\sigma_el/dt, proton dissociation into low-mass systems, \sigma^D(low M), and
high-mass dissociation, d\sigma/d(\Delta\eta)) in a wide energy range from
CERN-ISR to LHC energies, may be described in a two-channel eikonal model with
only one `effective' pomeron. By allowing the pomeron coupling to the
diffractive eigenstates to depend on the collider energy (as is expected
theoretically) we are able to explain the low value of \sigma^D(low M) measured
at the LHC. We calculate the survival probability, S^2, of a rapidity gap to
survive `soft rescattering'. We emphasize that the values found for S^2 are
particularly sensitive to the detailed structure of the diffractive
eigenstates.
