| Paper |
Title |
Page |
| MOPAN069 |
Ultrasound Diagnostics of the Superconducting Cable Connections Between the Main Ring Magnets of LHC
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311 |
| |
- F. Caspers, T. Kroyer, J.-P. G. Tock, L. R. Williams
CERN, Geneva
- J. Kulka
AGH, Cracow
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As part of the LHC assembly program, the super-conducting magnets are interconnected after installation. Electrical continuity between the magnets is ensured via a specifically designed cable splice box which allows the cables to be electrically joined by an automated low temperature brazing technique. The electrical resistance and mechanical strength of the cable junctions depend on the quality of the brazed joint. An ultrasound diagnostic of the brazed joint has been developed to accompany the visual inspection and reinforce the quality control process. Non-standard ultrasound diagnostic techniques, without using matching liquids or gel in the harsh and congested working environment, applied to the sandwich structure of the cable splice box, which presents high ultra-sonic losses due to multiple scattering, have been developed. The equipment and methods implemented are described in detail, together with results of quality control tests made in the production environment.
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| MOPAN079 |
Assembly and Quality Control of the LHC Cryostats at CERN. Motivations, Means, Results and Lessons Learned
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338 |
| |
- A. Poncet, P. Cruikshank, V. Parma, P. M. Strubin, J.-P. G. Tock, D. Tommasini
CERN, Geneva
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In 2001 the project management decided to perform at CERN the final assembly of the LHC superconducting magnets,with cryostat parts and cold masses produced by European Industry in large series. This industrial-like production has required a very significant investment in tooling,production facilities,engineering and quality control efforts, in contractual partnership with a consortium of firms. This unusual endeavour of a limited lifetime represented more than 800'000 working hours spanning over four years,the work being done on a result oriented basis by the contractor. This paper presents the reasons for having insourced this project at CERN,describes the work breakdown structure,the production means and methods,the infrastructure specially developed,the tooling,logistics and quality control aspects of the work performed,and the results achieved, in analytical form. Finally the lessons learned are outlined.
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