  We have investigated the atom trapping geometry for trapping of $^{87}{Rb}$
atoms in a radio-frequency (rf) dressed potential generated after superposing a
strong linearly polarized rf-field on a static magnetic trap. For this, laser
cooled atoms in a magneto-optical trap (MOT) in an ultra-high vacuum (UHV)
chamber (pressure $\sim$ 1.5 $\times$ $10^{-10}$ Torr) were trapped in a
quadrupole magnetic trap and evaporatively cooled before transferring them to
the rf-dressed potential. The experimentally observed hollow shell type atom
trapping geometry has been explained by theoretical modelling of the trapping
potential.
