CERN Accelerating science

Article
Report number	CERN-ATS-2010-144
Title	Towards a Consolidation of LHC Superconducting Splices for 7 TeV Operation
Author(s)	Bertinelli, F (CERN) ; Catalan Lasheras, N (CERN) ; Fessia, P (CERN) ; Garion, C (CERN) ; Mathot, S (CERN) ; Perin, A (CERN) ; Scheuerlein, C (CERN) ; Sgobba, S (CERN) ; ten Kat, H (CERN) ; Tock, J P (CERN) ; Verweij, A (CERN) ; Willering, G (CERN)
Publication	2010
Imprint	01 Jun 2010
Number of pages	4
In:	1st International Particle Accelerator Conference, Kyoto, Japan, 23 - 28 May 2010, pp.MOPEB042
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Free keywords	consolidation ; LHC ; 7 TeV
Abstract	Following the analysis of the September 2008 LHC incident, the assembly process and the quality assurance of the main 13 kA interconnection splices were improved, with new measurement and diagnostics methods introduced. During the 2008-2009 shutdown  5% of these 10 000 splices were newly assembled with these improvements implemented, but essentially maintaining the original design. It is known today that a limiting factor towards 7 TeV operation is the normal conducting resistance of  15% of the original main 13 kA interconnection splices, associated to the electrical continuity of the copper stabiliser. A “Splices Task Force” has been set up at CERN to evaluate the need for, develop and test design improvements and prepare the implementation of a consolidation campaign. Important issues of splice design, process choice, resources and time requirements are considered.
Copyright/License	publication: (License: CC-BY)

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