  We report loading of laser-cooled caesium atoms into a hollow-core
photonic-bandgap fiber and confining the atoms in the fiber's 7 $\mu m$
diameter core with a magic-wavelength dipole trap at $\sim$935 nm. The use of
the magic wavelength removes the AC-Stark shift of the 852nm optical transition
in caesium caused by the dipole trap in the fiber core and suppresses the
inhomogeneous broadening of the atomic ensemble that arises from the radial
distribution of the atoms. This opens the possibility to continuously probe the
atoms over time scales of a millisecond -- approximately 1000 times longer than
what was reported in previous works, as dipole trap does not have to be
modulated. We describe our atom loading setup and its unique features and
present spectroscopy measurements of the caesium's D$_{2}$ line in the
continuous wave dipole trap with up to $1.7 \times 10^{4}$ loaded inside the
hollow-core fiber.

Atomic Physics