  After the discovery of the Higgs boson at the LHC, particle physics community
is exploring and proposing next accelerators, to address the remaining open
questions on the underlying mechanisms and constituents of the present
universe. One of the studied possibilities is FCC (Future Circular Collider), a
100 km long collider at CERN. The feasibility study of this future proposed
accelerator implies the definition of tolerances on magnets imperfections and
of the strategies of correction in order to guarantee the target performances
of the High Energy Booster ring. The efficiency of the correction scheme, used
to control the orbit, directly bounds the corrector needs and magnet
tolerances. Analytic formulae give a first estimation of the average rms value
of the required linear correctors' strengths and of the allowed magnets
misalignments and field quality along the entire ring. The distribution of the
correctors along the ring is simulated in order to verify the quality of the
residual orbit after the proposed correction strategy and compared with the
analytical predictions. First specifications of the orbit correctors strength
and tolerances for the alignment of the main elements of the ring are
presented. The limits of the studied correction scheme and method are also
discussed.
