ATLAS End Cap Toroid Final Integration, Test and Installation

Author

Baynham, D.E. ; Carr, F.S. ; Holtom, E. ; Buskop, J. ; Dudarev, A. ; Vandoni, G. ; Ruber, R. ; Foussat, A. ; Losasso, M. ; Benoit, P. ; Pengo, R. ; Stewart, L. ; Olyunin, A. ; Stepanov, V. ; Kopeykin, N. ; Shugaev, I. ; Arnaud, M. ; ten Kate, H.H.J.

Author_Institution

Rutherford Appleton Lab., Didcot

Volume

18

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

391

Lastpage

394

Abstract

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.

Keywords

particle spectrometers; position sensitive particle detectors; superconducting magnets; ATLAS end cap toroid; ATLAS experiment; ATLAS muon spectrometer; air-cored toroidal magnet system; barrel toroid; cryostat vessel; superconducting toroidal magnet system; vacuum cryostats; Particle detector; superconducting magnet; toroid;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2008.920668

Filename

4492795