NDLI: Hot Spot in ATLAS Barrel Toroid Quenches

Content Provider	IEEE Xplore Digital Library
Author	Berriaud, C. Juster, F.P. Arnaud, M. Benoit, P. Broggi, F. Deront, L. Dudarev, A. Foussat, A. Humeau, M. Junker, S. Kopeykin, N. Leboeuf, R. Mayri, C. Olesen, G. Pengo, R. Ravat, S. Rey, J.-M. Sbrissa, E. Stepanov, V. ten Kate, H.H.J. Vedrine, P. Volpini, G.
Copyright Year	2002
Abstract	The ATLAS Barrel Toroid, the largest toroid ever built with 1.1 GJ stored energy, has been successfully tested after installation in the underground cavern in fall 2006. The eight coils of the Barrel Toroid were tested individually before and showed fully acceptable performances. We observed only one training quench during an individual coil test (at 30 A below the maximum test current) and no training during the test of the fully assembled toroid. At currents up to the nominal value of 20.5 kA, the toroid has been quenched inducing normal zones by means of heaters or by stopping the helium flow in the current leads. The quench safety system worked perfectly. Given the safe peak temperatures measured in the cold mass following various quenches, it is concluded that the Barrel Toroid can be operated safely. In this paper, the hot spot of the toroid is presented in detail: the measurement data are compared to various theoretical models.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1313
Ending Page	1316
Page Count	4
File Size	598290
File Format	PDF
ISSN	10518223
Volume Number	18
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Testing Superconducting coils Superconducting magnets Toroidal magnetic fields Temperature measurement Protection Superconducting cables Thermal quenching Current measurement testing Detector magnet protection superconducting racetrack coil
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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