Fig. 14From: Straightening of superconducting HERA dipoles for the any-light-particle-search experiment ALPS IIThe laser tracker to measure the position of a reflector in the vacuum pipe of the dipole through an open flange in the end box. Middle: Mouse with attached reflector inserted into the beam pipe; Right: Before insertion. The string connected to the mouse is used to pull it through the beam pipeBack to article page