8 Accelerator Engineering and Technology: Accelerator Technology
493
Fig. 8.92 Absolute and relative tolerance
have to be refined in the future in order to fit with the tight tolerances requested by
the Compact Linear collider (CLIC) or by the Future Circular Collider (FCC).
8.9.4 Definition of the Beam Line on the Accelerator Site
A circulating particle beam is not influenced by gravity, therefore the physicists
calculate the theoretical trajectory of a beam line in a local Cartesian co-ordinate
system xyz. A specific software application (Beatch, MADx) providing the optics
can also generate a 3D co-ordinate file in this local system. In order to obtain
the co-ordinates in a global site co-ordinate system XYZ, the geodesists provides
parameters for the geographical location of the accelerator with respect to the
existing installations or geological/technical constraints. These parameters are
typically the co-ordinates of a starting point and two angles, a slope and an
orientation. They can also be three translations and three rotations, allowing the
transformation from the local co-ordinate system one into the global one.
The 3D co-ordinates of the accelerator components will be used in particular
for the 3D definition of the civil engineering works as well as for the accurate
positioning of these components.
8.9.5 Geodetic Network
The absolute positioning of accelerator components, known in a XYZ co-ordinate
system, is ensured by means of a geodetic network. The accuracy of this framework
has, of course, a direct influence on the control of the absolute geometry of the
accelerator to be built.
493
Fig. 8.92 Absolute and relative tolerance
have to be refined in the future in order to fit with the tight tolerances requested by
the Compact Linear collider (CLIC) or by the Future Circular Collider (FCC).
8.9.4 Definition of the Beam Line on the Accelerator Site
A circulating particle beam is not influenced by gravity, therefore the physicists
calculate the theoretical trajectory of a beam line in a local Cartesian co-ordinate
system xyz. A specific software application (Beatch, MADx) providing the optics
can also generate a 3D co-ordinate file in this local system. In order to obtain
the co-ordinates in a global site co-ordinate system XYZ, the geodesists provides
parameters for the geographical location of the accelerator with respect to the
existing installations or geological/technical constraints. These parameters are
typically the co-ordinates of a starting point and two angles, a slope and an
orientation. They can also be three translations and three rotations, allowing the
transformation from the local co-ordinate system one into the global one.
The 3D co-ordinates of the accelerator components will be used in particular
for the 3D definition of the civil engineering works as well as for the accurate
positioning of these components.
8.9.5 Geodetic Network
The absolute positioning of accelerator components, known in a XYZ co-ordinate
system, is ensured by means of a geodetic network. The accuracy of this framework
has, of course, a direct influence on the control of the absolute geometry of the
accelerator to be built.