Minimisation of the wire position uncertainties of the new CERN wire scanner

by Juan Herranz Alvarez (Universitat Politecnica Catalunya (ES))

Monday 22 Feb 2016, 14:45 → 15:30 Europe/Zurich

864/1-C02 - indisponible a partir du 24/04/2017 (CERN)

Abstract:

In the next years the luminosity of the LHC will be significantly increased. This will require a much higher accuracy of beam profile measurement than actually achievable by the current wire scanner. The new fast wire scanner is foreseen to measure small emittance beams throughout the LHC injector chain. It demands a wire travelling speed up to 20 ms‐1 and a position measurement accuracy of the order of a few microns. The vibrations of the mechanical parts of the system, and particularly the vibrations of the thin carbon wire, were identified as the major error sources of wire position uncertainty. Therefore, the understanding of the wire vibrations is a high priority for the design and operation of the new device. This presentation presents the work performed to understand the main causes of the wire vibrations observed in one of the existing wire scanner and the new proposed design.