8 Accelerator Engineering and Technology: Accelerator Technology
497
Fig. 8.96 Micro-triangulation
Fig. 8.97 FSI principle and instrumentation
8.96) is based on angle measurements taken automatically by several theodolites.
This technique allows to measure at the same time the fiducials located on the
magnet and the wire used for the determination of the magnetic axis. The FSI (Fig.
8.97) technique measures very accurate absolute distances between points located
around the magnet, including the fiducials.
In the case of cryogenic components, the magnet is located inside a vacuum
vessel. The fiducialisation having been done at warm or at cold temperature, it could
be necessary to monitor the movement of the magnet with respect to the fiducials
at different state. This determination could be done using the FSI technique or an
optical measuring system called Brandeis Camera Angle Monitor (BCAM). It is
a three points measuring system composed of a CCD camera measuring a light
flashing through a lens (Fig. 8.98).
497
Fig. 8.96 Micro-triangulation
Fig. 8.97 FSI principle and instrumentation
8.96) is based on angle measurements taken automatically by several theodolites.
This technique allows to measure at the same time the fiducials located on the
magnet and the wire used for the determination of the magnetic axis. The FSI (Fig.
8.97) technique measures very accurate absolute distances between points located
around the magnet, including the fiducials.
In the case of cryogenic components, the magnet is located inside a vacuum
vessel. The fiducialisation having been done at warm or at cold temperature, it could
be necessary to monitor the movement of the magnet with respect to the fiducials
at different state. This determination could be done using the FSI technique or an
optical measuring system called Brandeis Camera Angle Monitor (BCAM). It is
a three points measuring system composed of a CCD camera measuring a light
flashing through a lens (Fig. 8.98).