Trends in Cable Magnetization and Persistent Currents during the Production of the Main Dipoles of the Large Hadron Collider

Boris Bellesia , L. Bottura , V. Granata , S. Le Naour , L. Oberli , S. Sanfilippo , C. Santoni (1) , W. Scandale , N. Schwerg , E. Todesco , C. Vollinger

1 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

The production of more than 60% of superconducting cables for the main dipoles of the Large Hadron Collider has been completed. The results of the measurements of cable magnetization and the dependence on the manufacturers are presented. The strand magnetization produces field errors that have been measured in a large number of dipoles (approximately 100 to date) tested in cold conditions. We examine here the correlation between the available magnetic measurements and the large database of cable magnetization. The analysis is based on models documented elsewhere in the literature. Finally, a forecast of the persistent current effects to be expected in the LHC main dipoles is presented, and the more critical parameters for beam dynamics are singled out.

Mots clés: Accelerator magnets; magnetic field measurement; superconducting accelerator magnets; superconducting cables; LHC

Domaines: Physique des accélérateurs [physics.acc-ph]

Boris Bellesia, L. Bottura, V. Granata, S. Le Naour, L. Oberli, et al.. Trends in Cable Magnetization and Persistent Currents during the Production of the Main Dipoles of the Large Hadron Collider. Applied Superconductivity Conference : Harnessing The Magic (ASC 04), Oct 2004, Jacksonville, United States. pp.1213-1216, ⟨10.1109/TASC.2005.849534⟩. ⟨in2p3-00025180⟩