Survey and alignment for a 20-TeV on 20-TeV collider

The effects of magnet misalignments in a 20-TeV on 20-TeV anti pp collider are simulated numerically. Both short-range and long-range alignment errors are considered for an example lattice design, and closed-orbit errors are simulated. Finally, closed orbit corrections using a least-squares scheme are performed. Automatic surveying methods are attractive for a multi-TeV collider, because of the large accelerator circumference, the large number of magnets, and the small tunnel cross section. The specific example of an automatic surveying scheme based upon an Inertial Navigation System is discussed, and the most important sources of error are described