Proposal to add a beam stopper in TT10

We propose to install a beam stopper in the TT10 transfer line from the PS to the SPS. This beam stopper will replace one of the three sets of magnets in the present access safety chain. This will make the access safety chain more robust against a possible common mode failure in the powering system of the magnets. We have investigated three scenarios for the installation of a beam stopper and found that a PS type beam stopper, in front of the radiation shielding at the start of the TT10 line, is the best solution.