Abstracts Brochure - CERN

THPCH181
THPCH182
THPCH183
29-Jun-06 16:00 - 18:00 THPCH — Poster Session
Overview of the Large Hadron Collider Cryo-magnets Logistics
O. Capatina, K. Artoos, R. Bhiery, P. Brunero, J.M. Chevalley, L.P.
Dauvergne, T. Feniet, K. Foraz, J. Francey, J.L. Grenard, K. Kershaw,
S. Pelletier, S. Prodon, I. Ruehl, J. Uwumarogie, R. V. Valbuena, G.
Vellut, S. Weisz (CERN)
440
More than 1700 superconducting cryo-magnets
have to be installed in the Large Hadron
Collider tunnel. The long, heavy and fragile
LHC cryo-magnets are difficult to handle
and transport in particular in the LEP tunnel
environment originally designed for smaller,
lighter LEP magnets. An installation rate of more than 20 cryo-magnets per week is needed to cope with the foreseen
LHC installation end date. The paper gives an overview of the transport and installation sequence complexity, from
the storage area at the surface to the cryo-magnet final position in the tunnel. The success of this task depends on a
series of independent factors that have to be considered at the same time. The equipment needed for the transport
and tunnel installation of the LHC cryo-magnets is briefly described. The manpower and equipment organisation as
well as the challenges of logistics are then detailed. The paper includes conclusions and some of the lessons learned
during the first phase of the LHC cryo-magnets installation.
Control of the Geometrical Conformity of the LHC Installation with a Single Laser Source
A large and complex accelerator like LHC
J.-P. Corso, M. Jones, Y. Muttoni (CERN)
machine needs to integrate several thousand
different components in a relatively limited
space. During the installation, those components are installed in successive phases, always aiming to leave the
necessary space available for the equipment which will follow. To help ensure the correct conditions for the installation,
the survey team uses a laser scanner to measure specific areas and provides this data, merged together in a known
reference system, to the integration team who compares the results with the 3D CAD models. This paper describes
the tools and software used to rebuild underground zones in the CATIA environment, to check interferences or
geometrical non-conformities, as well as the procedures defined to solve the identified problems.
Installation and Quality Assurance of the Interconnections between Cryo-assemblies of
the LHC Long Straight Sections
The interconnections between the cryomag-
C. Garion, I. Slits, J.-P.G. Tock (CERN)
nets and cryogenic utilities in the LHC long
straight sections constitute the last machine
installation activity. They are ensuring continuity of the beam and insulation vacuum systems, cryogenic fluid and
electrical circuits and thermal insulation. The assembly is carried out in a constraining tunnel environment with restricted
space. Therefore, the assembly sequence has to be well defined, and specific tests have to be performed during
the interconnection work to secure the reliability of the system and thus to ensure the global accelerator availability.
The LHC has eight long straight insertion zones composed of special cryomagnets involving specific interconnection
procedures and QA plans. The aim of this paper is to present the installation and quality assurance procedures
implemented for the LHC LSS interconnections. Technologies such as manual and automatic welding and resistive
soldering will be described as well as the different quality controls such as visual and radiographic inspection of
welds, electrical and leak testing. An evaluation and statistical analysis of the results of the interconnection work will
be presented.