  Small angle neutron scattering (SANS) is an historical technique to study the
flux lines lattice (FLL) in a superconductor. Structural characteristics of the
FLL can be revealed, providing fundamental information for the physics of
vortex lattice.
  However, the spatial resolution is limited and all the correlation lengths of
order are difficult to extract with precision.
  We show here that a time of flight technique reveals the Bragg peak of the
FLL, and also its translational order with a better resolution.
  We discuss the implication of these results for pinning mechanisms in a
Niobium sample.
