  Background: Intrinsic charm, nonperturbative charm in the hadron
wavefunction, has long been speculated but has never been satisfactorily
proven. Open charm and $J/\psi$ measurements in a fixed-taget configuration at
the LHCb searched for this contribution but reported no evidence. Purpose:
$\overline D$ meson and $J/\psi$ production is calculated for the SMOG
fixed-target configuration in the LHCb experiment using a combination of
perturbative QCD and intrinsic charm to see whether intrinsic chaarm would
indeed be observable in the SMOG kinematics. Methods: Open charm and $J/\psi$
production is calculated to next-to-leading order in perturbative QCD. Because
a gas jet nuclear target is used, cold nuclear matter effects are included in
the perturbative calculations. The intrinsic charm is calculated assuming
production from a $|uud c \overline c \rangle$ Fock state. Results: The
differential rapidity and transverse momentum distributions in $p+{\rm Ne}$,
$p+{\rm He}$ and $p+{\rm Ar}$ fixed-target interactions are calculated in the
SMOG acceptance and compared to data. The predicted asymmetries between
$\overline D$ (leading charm) and $D$ (nonleading charm) are also shown.
Conclusions: The contribution from intrinisic charm is small and decreases with
center of mass energy. The calculations agree well with the current SMOG data,
with or without intrinsic charm.
