Electromagnetic design of the new inner triplet quadrupoles (Franck Borgnolutti - TE-MSC)

by Franck Borgnolutti (Inst. Universitaire de Technologie Nancy-Charlemagne (IUT) - Uni)

Tuesday 3 Mar 2009, 14:00 → 15:30 Europe/Zurich

30/7-012 (CERN)

The phase I of the LHC upgrade aims at increasing the luminosity by a factor 2-3 with respect to the nominal luminosity of 1034 cm-2s-1. Part of this increase is obtained through a reduction of * from 55 to 25-30 cm. This requires the replacement of the present quadrupole triplets of 70 mm aperture around the Atlas ad CMS interaction regions with a new set of Nb-Ti quadrupoles with 120 mm aperture. In this seminar we present a proposal for the electromagnetic design of the coil cross-section, layer jump, and of the non-connection side of the coil ends. A staged approach to the coil optimization has been chosen, relying on semi-analytical methods for a first draft of the sector coil and on successive refinements using numerical codes as Roxie. We also present an estimate of the uncertainty associated to the systematic field quality components, and of the random part.

Slides fb_MQXC_final_design_17022009.pdf fb_MQXC_final_design_17022009.ppt