First Cool-Down and Test at 4.5 K of the ATLAS Superconducting Barrel Toroid Assembled in the LHC Experimental Cavern

Author

Barth, K. ; Delruelle, N. ; Dudarev, A. ; Passardi, G. ; Pengo, R. ; Pezzetti, M. ; Pirotte, O. ; Kate, H. Ten ; Baynham, E. ; Mayri, C.

Author_Institution

CERN, Eur. Organ. for Nucl. Res., Geneva

Volume

18

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

383

Lastpage

386

Abstract

The large ATLAS superconducting magnets system consists of the Barrel, two End-Caps Toroids and the Central Solenoid. The eight separate coils making the Barrel Toroid (BT) have been individually tested with success in a dedicated surface test facility in 2004 and 2005 and afterwards assembled in the underground cavern of the ATLAS experiment. In order to fulfill all the cryogenic scenarios foreseen for these magnets with a cold mass of 370 tons, two separate helium refrigerators and a complex helium distribution system have been used. This paper describes the results of the first cool-down, steady-state operation at 4.5 K and quench recovery of the BT in its final configuration.

Keywords

accelerator magnets; cryogenics; particle accelerator accessories; position sensitive particle detectors; superconducting magnets; ATLAS superconducting barrel toroid; ATLAS superconducting magnets system; barrel toroid; central solenoid; cryogenics; end-caps toroids; helium distribution system; helium refrigerators; temperature 4.5 K; ATLAS barrel toroid; LHC experiment; large helium refrigerator; superconducting magnet;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2008.920638

Filename

4483760