Engineering design optimisation of the superconducting end cap toroid magnets for the ATLAS experiment at LHC

2007

The ATLAS particle detector presently being installed at the LHC at CERN requires magnetic field for charged particles bending in an 8000 m 3 volume. A system of four superconducting magnets was designed comprising a Central Solenoid making 2 T for the inner detector as well as two End-cap Toroids and a Barrel Toroid generating the about one tesla magnetic field for the muon detectors. The magnet system with a stored energy of 1.6 GJ is sized 22 m in diameter and 26 m in length. After about 15 years of design, construction in industry, system integration at CERN and installation in the underground cavern, the completion is imminent. At present, in August 2006, the Central Solenoid is operational, the Barrel Toroid installation complete and 4 K tests in progress and the 2 End Cap Toroids are being integrated and will soon be installed as well. Magnet services for vacuum, He cryogenics, power converters and circuits as well as controls and safety systems are operational. In the paper the status of the various magnets is reviewed and the first experience and test results with the magnets installed are reported.

show abstract

Section: End Cap Toroidsmentioning

confidence: 99%

ATLAS Superconducting Magnet System Status

2007

show abstract

“…5). The design of the ECT was completed by RAL [9]- [11], the construction of the coil modules [12] and cryostats [13] is supported by NIKHEF. After shipment to CERN of the vacuum vessels and coil modules the cold mass is assembled on site and inserted in the cryostat [14].…”

Section: Status Of Constructionmentioning

confidence: 99%

The ATLAS Superconducting Magnet System: Status of Construction & Installation

2006

“…Since the magnetic windings of the toroids overlap, the ECT is pulled inside the BT with a force going up to about 300 tons from either side, requiring a force transfer from ECT to the BT, which takes the reaction force. The design of the End Cap Toroid is essentially performed by RAL, supported during the production by NIKHEF and CERN [7]- [9]. The production of the 26 km of Al stabilized NbTi/Cu conductor with section , produced by VAC (now EAS) and EM/Cortaillod (now Outokumpu/Nexans) is completed as well as the coil winding at Brush HMA.…”

Section: End Cap Toroidsmentioning

confidence: 99%

ATLAS Superconducting Toroids and Solenoid

2005