Warm and Cold Magnetic and Mechanical Alignment Tests of LHC Short Straight Sections

This paper contains a summary of the results of the magnetic and mechanical alignment tests performed at CERN on the first 111 arc Short Straight Sections. These include the mechanical axis of the Cold Bore Tube at room temperature, the magnetic axis of main quadrupoles and correctors at both room and cryogenic temperature, and the field direction of the main quadrupoles. The measurements show that the quality of the assemblies is generally within the requirements for the machine

LHC dipoles geometry stability

This note summarizes the geometrical measurements made in SMI2 on a list of 14 LHC cryo-dipoles and the comparison to the measurements made in SMA18 during the fiducialisation. The analysis will focus on the change of shape, the movements of the cold mass with respect to the cryostat and will present a proposal to recalculate the position of the fiducials using the baseline measurements made in SMI2

Experience from Measuring the LHC Quadrupole Axes

For historical reasons a pool of equipment is available to measure the axis of the LHC arc quadrupoles. Any of them needs a survey measurement to reference its intrinsic coordinate system to the cryostat fiducials. Up to now 10 quadrupoles have been measured in cold condition. We present our experience, our success next to our failures, explaining the reasons of these failures. This contribution emphasises the day to day problems of such measurements in an ”industrial ” environment and shows simple aids to circumvent them. 1

Collaborative Factory Planning in Virtual Reality

The competitive development and optimization of manufacturing systems challenge the collaboration and innovation of enterprises. Different information, thinking, and points of view have to be exchanged across engineering, decision-making, and executive levels safely and effectively. The Virtual Reality (VR) technologies provide the users advanced Human-Computer-Interfaces for designing, analyzing, and optimizing complex manufacturing systems. The objective of this paper is to describe a VR-based approach that allows the simultaneous visualization, investigation, and analysis for factory planning. This gives global entities a competitive advantage when conducting business

Magnetic and mechanical axis of Short Straight Sections in the arcs: a summary of the results of the first 111 warm and cold series tests.

This report contains a statistical summary of the results of the magnetic and mechanical alignment tests performed at CERN on the first 111 Short Straight Sections for the arcs. The measurements, obtained with different instruments, include the mechanical axis of the Cold Bore Tube at room temperature and the magnetic axis of main quadrupoles and correctors at both room and cryogenic temperature. The results show that both the accuracy of the instruments and the quality of the assemblies are, on average, well within the specifications