CRYRING@ESR - Facility for Antiproton and Ion Research

28 Chapter 6. Proposed Construction Cycle
6.7 Assembly of CRYRING and Injection Beam Lines
6.7.1 Preparation of Magnetic Components: Fiducialization
As network measurements and final alignment are based on using Laser Trackers and Digital
Levels about 55 magnetic components of the CRYRING and two injection beam lines have to be
fiducialized before assembly. Fiducialization means that the magnetic axes, planes and effective
centres of dipole, quadrupole or sextupole magnets have to be transferred to mechanical marks
suitable for the final alignment during the assembly of beam lines and ring. As the alignment of
12 quadrupole magnets in the injection beam lines will be carried out by telescope, fiducialization
of these components is not necessary and a 3D-determination of the actual condition w.r.t. the
global coordinate system will not be possible.
6.7.2 Procurement of Mechanical Parts
The procurement of about 200 additional mechanical supports is necessary for lifting the low
energy injection beam line and the present beam axis of CRYRING from 1.5 m to 2.0 m which
is the nominal height for ion beams in ESR and in the Target Hall.
The material for the supports of the 20 m long new beam line from the high energy beam
transport to the CRYRING is available from the pool of dismantled systems.
6.7.3 Assembly
Survey Before starting the mechanical assembly the positions of all bending magnets (beam
lines and CRYRING) have to be surveyed precisely. Position marks on the ground floor with an
accuracy of ±0.5 mm will help to achieve a rather good positioning during the assembly work
without the presence of the survey people.
Assembly of CRYRING The assembly of the ring will be performed sector by sector. By
this way assembled sectors can already be connected to power supplies and water cooling while
others are still being mechanically assembled. Fine alignment of the ring can be done by means
of laser tracking simultaneously to the mechanical assembly of the injection beam lines.
Assembly of Injection Beam Lines The alignment of the beam lines will be done by applying
conventional methods. Therefore three pillars with bearings for telescopes have to be surveyed in
advance. Targets marking the axes of quadrupoles will allow fine adjustments to about ±0.5 mm
accuracy. Suitable marks on the luminescent screens, applied for the determination of the ion
beam axis, can be adjusted by this method to similar accuracy.