Stability of Al-stabilized conductors for LHC detector magnets

Author

Juster, F.P. ; Lottin, J.C. ; Boldi, L. ; De Lorenzi, R. ; Fabbricatore, Pasquale ; Musenich, R. ; Baynham, D.E. ; Sampson, P.L.

Author_Institution

CEA-Saclay, Gif-sur-Yvette, France

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

377

Lastpage

380

Abstract

The magnets actually under design for the Large Hadron Collider detectors at CERN, ATLAS and CMS, are based on Al stabilized conductors. The windings of these magnets are big structures epoxy impregnated and indirectly cooled by two-phase LHe. Energy releases due to epoxy cracking or to friction between cables could quench the whole magnet. In order to prevent this occurrence, the stability against thermal disturbances must be carefully studied. This paper deals with the development of numerical codes which are able to calculate the recovery or the propagation of a 3D normal zone in a nonhomogeneous and anisotropic medium. Three different numerical codes are described. The codes were tested through the comparison of their prediction with the measurements of the minimum energy required to have a quench propagation on the mock-up of the DELPHI magnet at Rutherford Laboratory.<>

Keywords

calorimeters; finite element analysis; particle detectors; sensors; superconducting coils; thermal stability; 3D normal zone; Large Hadron Collider; detector magnets; epoxy cracking; epoxy impregnation; friction; indirect cooling; nonhomogeneous anisotropic medium; numerical codes; propagation; recovery; stability; superconducting magnets; thermal disturbances; windings; Anisotropic magnetoresistance; Cables; Collision mitigation; Conductors; Detectors; Friction; Large Hadron Collider; Magnets; Testing; Thermal stability;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402568

Filename

402568