  Starting from a degenerate Bose gas in a hybrid trap combining a magnetic
quadrupole trap and an attractive optical trap resulting from a focused laser
beam, we demonstrate the efficient loading of this quantum gas into a
shell-shaped trap. The shell trap is purely magnetic and relies on adiabatic
potentials for atoms in an inhomogeneous magnetic field dressed by a
radiofrequency (rf) field. We show that direct rf evaporation in the hybrid
trap enables an efficient and simple preparation of the cold sample, well
adapted to the subsequent loading procedure. The transfer into the shell trap
is adiabatic and limits the final excitation of the center-of-mass motion to
below 2 micrometres.
