Description of the Main Features of the Series Production of the LHC Main Dipole Magnets

Savary, F.; Bajko, M.; Chevret, P.; Rijk, G. de; Fessia, P.; Lienard, P.; Miles, J.; Modena, M.; Rossi, L.; Tommasini, D.; Vlogaert, J.; Bresson, Daniel; Grunblatt, G.; Decoene, J.-F.; Bressani, F.; Drago, Giovanni; Gagliardi, P.; Eysselein, F.; Gaertner, W; Lublow, P.

doi:10.1109/tasc.2008.920632

Cited by 9 publications

(9 citation statements)

References 8 publications

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“…The assembly of the magnet cold masses was performed by three European firms, based on a recipe specified by CERN [12]. CERN also acted as the main supplier of components.…”

Section: (A) Industrial Procurementmentioning

confidence: 99%

The technical challenges of the Large Hadron Collider

Collier

2015

Phil. Trans. R. Soc. A.

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The Large Hadron Collider (LHC) is a 27 km circumference hadron collider, built at CERN to explore the energy frontier of particle physics. Approved in 1994, it was commissioned and began operation for data taking in 2009. The design and construction of the LHC presented many design, engineering and logistical challenges which involved pushing a number of technologies well beyond their level at the time. Since the start-up of the machine, there has been a very successful 3-year run with an impressive amount of data delivered to the LHC experiments. With an increasingly large stored energy in the beam, the operation of the machine itself presented many challenges and some of these will be discussed. Finally, the planning for the next 20 years has been outlined with progressive upgrades of the machine, first to nominal energy, then to progressively higher collision rates. At each stage the technical challenges are illustrated with a few examples.

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“…The assembly of the magnet cold masses was performed by three European firms, based on a recipe specified by CERN [12]. CERN also acted as the main supplier of components.…”

Section: (A) Industrial Procurementmentioning

confidence: 99%

The technical challenges of the Large Hadron Collider

Collier

2015

Phil. Trans. R. Soc. A.

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“…The design of the MB, of the MQ in the short straight sections and of the matching section quadrupoles MQM and MQY is described in detail in [1], [6]- [8]. For the scope of the present paper only the main design features in view of the discussion of the test results will be recalled.…”

Section: Magnet Design Features and Test Proceduresmentioning

confidence: 99%

“…The dipole and quadrupole assemblies are described in [6] and that of the matching quadrupoles in [8]. The superconducting coils are clamped in austenitic steel collars inside an iron yoke, the whole structure being contained in a shrinking cylinder.…”

Section: Coil Assembly and Magnet Parametersmentioning

confidence: 99%

Magnetic Performance of the Main Superconducting Magnets for the LHC

Sanfilippo

Sammut

Bottura

et al. 2008

IEEE Trans. Appl. Supercond.

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Abstract-The field strength and homogeneity of all the LHC superconducting magnets were measured as a part of the production control and qualification process that has taken place during the past four years. In addition to field measurements at room temperature performed on the integral of the production, a significant part of the magnets has been subjected to extensive magnetic measurements at cold. The measurements at cryogenic temperatures, generally performed up to excitation currents of 12 kA corresponding to the ultimate LHC energy of 7.6 TeV, were mainly based on static and dynamic field integral and harmonic measurements. This allowed us to study in detail the DC effects from persistent current magnetization and long-term decay during constant current excitation. These effects are all expected to be of relevance for the field setting and error compensation in the LHC. This paper reports the main results obtained during these tests executed at operating conditions. The integrated field quality is discussed in terms of distribution (average and spread) of the field strength and low-order harmonics as obtained for all the main ring magnet families (dipoles, main and matching quadrupoles). The dependence of field quality on coil geometry, magnet and cable manufacturer is analyzed. A projection of the field quality expected for the critical components in the machine is presented.

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“…For the development of the required technologies and for testing the operational devices at cryogenic temperatures, CERN operates a number of facilities, ranging from individual component tests to the final validation of the full scale magnets and cavities before installation. SM18 is the largest of these facilities, dedicated mainly to testing large magnets and superconducting RF cavities as well as other specific devices [1]; this is for example where the dipole and quadrupole cryo-magnets of the LHC were tested in 2002-2007 [2][3][4][5]. In addition to cryogenic testing SM18 is also a major area for conditioning and integrating the RF cavities before installation in the accelerator facilities…”

Section: Introductionmentioning

confidence: 99%

Upgrade of the cryogenic infrastructure of SM18, CERN main test facility for superconducting magnets and RF cavities

Perin

Dhalla

Gayet

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. SM18 is CERN main facility for testing superconducting accelerator magnets and superconducting RF cavities. Its cryogenic infrastructure will have to be significantly upgraded in the coming years, starting in 2019, to meet the testing requirements for the LHC High Luminosity project and for the R&D program for superconducting magnets and RF equipment until 2023 and beyond. This article presents the assessment of the cryogenic needs based on the foreseen test program and on past testing experience. The current configuration of the cryogenic infrastructure is presented and several possible upgrade scenarios are discussed. The chosen upgrade configuration is then described and the characteristics of the main newly required cryogenic equipment, in particular a new 35 g/s helium liquefier, are presented. The upgrade implementation strategy and plan to meet the required schedule are then described.

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Description of the Main Features of the Series Production of the LHC Main Dipole Magnets

Cited by 9 publications

References 8 publications

The technical challenges of the Large Hadron Collider

The technical challenges of the Large Hadron Collider

Magnetic Performance of the Main Superconducting Magnets for the LHC

Upgrade of the cryogenic infrastructure of SM18, CERN main test facility for superconducting magnets and RF cavities

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