  The post-linac energy collimation system of multi-TeV linear colliders is
designed to fulfil an important function of protection of the Beam Delivery
System (BDS) against miss-steered beams likely generated by failure modes in
the main linac. For the case of the Compact Linear Collider (CLIC), the energy
collimators are required to withstand the impact of a full bunch train in case
of failure. This is a very challenging task, assuming the nominal CLIC beam
parameters at 1.5 TeV beam energy. The increase of the transverse spot size at
the collimators using nonlinear magnets is a potential solution to guarantee
the survival of the collimators. In this paper we present an alternative
nonlinear optics based on a skew sextupole pair for energy collimation.
Performance simulation results are also presented.
