Rapid measurement of the deformation of the liner in a superconducting wiggler when the magnets transition to the normal state

The liner of a superconducting wiggler is a thin-walled elliptical copper tube that is positioned inside the vacuum chamber and serves as a heat shield. When the wiggler magnets transition to the normal state, the liner is affected by vertical forces that are able to deform it. In this work, a system for the rapid measurement of the deformation of a liner is described and the measurement results for three different liners are reported.