  We propose an innovative design for a vector magnet compatible with neutron
scattering experiments. This would vastly expand the range of experimental
possibilities since applying a magnetic field and orienting the sample in
diffraction conditions will become completely independent. This Wide Aperture
VEctor magnet is a setup made of 16 coils, all with a vertical axis. The
vertical component of the field is produced by two pairs of coaxial coils
carrying opposite currents for an active shielding of the stray field, while
the horizontal components are generated by 3 sets of 4 coils each, two above
and two below the diffraction plane. This innovative geometry allows a very
wide aperture (220$\,^{\circ}$ horizontal, $\pm$ 10$\,^{\circ}$ vertical),
which is crucial for neutron diffraction and inelastic neutron scattering
experiments. Moreover, the homogeneity of the field is far better than in the
usual vertical coils, and the diameter of the sample bore is unusually large
(10 cm).
  The concept has been developed so as to be used as a sample environment on
every LLB instrument relevant for magnetism studies.
