Measurement of the resistance to stress cycling at 4.2 K of LHC dipole collars

Author

Perini, D. ; Galante, N. ; Gilquin, J. ; Patti, G. ; Perin, R.

Author_Institution

Eur. Org. for Nucl. Res., CERN, Geneva, Switzerland

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1754

Lastpage

1757

Abstract

At each operation cycle of the LHC machine, the field of the superconducting dipoles will be raised from the injection level to the collision level and then decreased again. This will induce a stress cycle inside the structure. The collars will have to withstand several thousands of stress cycles during their life. In this paper a description of the test apparatus built to assess the strength of different types of collars is given. We also present results of measurements and draw some preliminary conclusions regarding the influence of material properties, geometry and surface condition, on the endurance of the collars

Keywords

beam handling equipment; proton accelerators; storage rings; stress analysis; superconducting magnets; synchrotrons; 4.2 K; Al; LHC dipole collars; collision level; geometry; injection level; material properties; stress cycle; stress cycling resistance; superconducting dipoles; surface condition; Coils; Control systems; Electrical resistance measurement; Geometry; Helium; Large Hadron Collider; Magnetic field measurement; Stress measurement; Superconducting magnets; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305596

Filename

305596