BEAM DELIVERY SYSTEMS FOR PEDESTRIANS

For the proposed e+e − linear colliders, the term ‘beam delivery system ’ (BDS) refers to the beam transport system from the exit of the linac to the interaction point (IP). These beamlines are not one but in effect several beamline sections, each dedicated to a specific task. Of primary importance is the final focus section (FFS), whose task it is demagnify the transverse beams size to the required ‘nanobeams ’ at the IP. In this paper, we briefly introduce the concepts and constraints on the designs of the BDS