  In this work, we investigate the evolution and settling of magnon
condensation in the spin-1/2 dimer system Sr$_{3}$Cr$_{2}$O$_{8}$ using a
combination of magnetostriction in pulsed fields and inelastic neutron
scattering in a continuous magnetic field. The magnetic structure in the
Bose-Einstein condensation (BEC) phase was probed by neutron diffraction in
pulsed magnetic fields up to 39~T. The magnetic structure in this phase was
confirmed to be an XY-antiferromagnetic structure validated by irreducible
representational analysis. The magnetic phase diagram as a function of an
applied magnetic field for this system is presented. Furthermore, zero-field
neutron diffraction results indicate that dimerization plays an important role
in stabilizing the low-temperature crystal structure.
