CERN Accelerating science

Article
Report number	LHC-Project-Report-32 ; CERN-LHC-Project-Report-32
Title	The LHC test string : first operational experience
Author(s)	Bézaguet, Alain-Arthur ; Brahy, D ; Casas-Cubillos, J ; Coull, L ; Cruikshank, P ; Dahlerup-Petersen, K ; Faugeras, Paul E ; Flemsæter, B ; Guinaudeau, H ; Hagedorn, Dietrich ; Hilbert, B ; Krainz, G ; Kos, N ; Lavielle, D ; Lebrun, P ; Leo, G ; Mathewson, A G ; Missiaen, D ; Momal, F ; Parma, Vittorio ; Quesnel, Jean Pierre ; Richter, D ; Riddone, G ; Rijllart, A ; Rodríguez-Mateos, F ; Rohmig, P ; Saban, R I ; Schmidt, R ; Serio, L ; Skiadelli, M ; Suraci, A ; Tavian, L ; Walckiers, L ; Wallén, E ; Van Weelderen, R ; Williams, L ; McInturff, A
Affiliation	(CERN) ; (LBL, Berkeley (CA), USA)
Publication	1996
Imprint	18 Jul 1996
Number of pages	4
In:	5th European Particle Accelerator Conference, Sitges, Barcelona, Spain, 10 - 14 Jun 1996, pp.e-proc. 358-360
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Abstract	CERN operates the first version of the LHC Test String which consists of one quadrupole and three 10-m twin aperture dipole magnets. An experimental programme aiming at the validation of the LHC systems started in February 1995. During this programme the string has been powered 100 times 35 of which at 12.4 kA or above. The experiments have yielded a number of results some of which, like quench recovery for cryogenics, have modified the design of subsystems of LHC. Others, like controlled helium leaks in the cold bore and quench propagation bewteen magnets, have given a better understanding on the evolution of the phenomena inside a string of superconducting magnets cooled at superfluid helium temperatures. Following the experimental programme, the string will be powered up and powered down in one hour cycles as a fatigue test of the structure thus simulating 20 years of operation of LHC.
Copyright/License	publication: (License: CC-BY)

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