The ATLAS Superconducting Magnet System: Status of Construction &amp; Installation

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Section: Introductionmentioning

confidence: 99%

Commissioning Test of ATLAS End-Cap Toroidal Magnets

Dudarev

Kate

Buskop

et al. 2009

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“…The main magnet system parameters are listed in Table I. Design and manufacturing features were reported during the past 10 years at several occasions [1], [2]. The installation of the entire magnet system in the ATLAS cavern 100 m underground at CERN is completed in 2007.…”

Section: Introductionmentioning

confidence: 99%

ATLAS Magnet System Nearing Completion

Kate

2008

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Abstract-The ATLAS Detector at the Large Hadron Collider at CERN is equipped with a superconducting magnet system that consists of a Barrel Toroid, two End-Cap Toroids and a Central Solenoid. The four magnets generate the magnetic field for the muonand inner tracking detectors, respectively. After 10 years of construction in industry, integration and on-surface tests at CERN, the magnets are now in the underground cavern where they undergo the ultimate test before data taking in the detector can start during the course of next year. The system with outer dimensions of 25 m length and 22 m diameter is based on using conduction cooled aluminum stabilized NbTi conductors operating at 4.6 K and 20.5 kA maximum coil current with peak magnetic fields in the windings of 4.1 T and a system stored magnetic energy of 1.6 GJ. The Barrel Toroid and Central Solenoid were already successfully charged after installation to full current in autumn 2006. This year the system is completed with two End Cap Toroids. The ultimate test of all toroids by which maximum mechanical and thermal loads are exerted is being prepared and will be performed late 2007 where after normal operation will commence. The status of the project in its nearly completed state as well as the first experience with testing and operation in the underground cavern are reported.

“…T HE ATLAS muon spectrometer is based on a superconducting toroid magnet system [1] consisting of a long Barrel Toroid (BT) and two End Cap Toroids (ECT's) designated ECTA and ECTC according to their position in the ATLAS experiment. The major features of the End Cap Toroid Magnet design and manufacture have been described elsewhere [2].…”

Section: Introductionmentioning

confidence: 99%

ATLAS End Cap Toroid Final Integration, Test and Installation

Baynham

Carr

Holtom

et al. 2008

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The ATLAS Experiment at LHC, CERN will utilize a large, superconducting, air-cored toroidal magnet system with a long Barrel Toroid and two End Cap Toroids. Each End Cap Toroid contains eight racetrack coils mounted as a single cold mass in a cryostat vessel of approximately 10 m diameter and 5 m length. The operating current is 20.5 kA at 0.25 GJ stored energy and a peak field of 4.1 T in the windings. This paper presents the status of the End Cap Toroid Project. Final integration of the two cold masses, 120 tons each, into their respective vacuum cryostats is described. The specialized techniques, procedures and tooling infrastructure required for these operations are explained. Pre-installation cooldown to 85 K is reported. Installation of the toroids in the ATLAS cavern 100 m underground will be described. The final interfacing to the Barrel Toroid and services in the cavern will be reviewed along with preparations for final test and commissioning.