Investigation of Coupling during the Non-Local Fast Extraction in the SPS

The CENF (CERN Neutrino Facility) requires a high-intensity and high-energy beam (100 GeV) to be extracted in only one machine revolution from the Long Straight Section 2 (LSS2) of the SPS. However, since LSS2 has always been used for slow extraction, no kickers are installed in this straight section. The kickers already installed in another long straight section were used for a non-local fast extraction, to extract the beam in a single turn from LSS2. This note compares the trajectories obtained during the fast extraction feasibility studies (Sept 2012) with simulations performed using MAD-X and PTC in order to evaluate the magnitude of coupling in the SPS, as in the case of strong coupling the extraction would be aected.