Modeling of transmission line effects for a string of LHC dipole magnets

by F. Bourgeois (Division LHC)

Thursday 19 Apr 2001, 14:15 → 15:15 Europe/Zurich

30-7- (CERN)

Each LHC sector is comprised of 154 dipole magnets, and transmission line effects and their impact on magnet protection and beam operation need to be considered. This seminar will discuss the synthesis methodology used for the electrical modeling of dipole magnets as a passive device into an R/L/C circuit. Amplitude and phase measurements of the device under test are used to find sets of poles and zeros approximating its electrical behavior through the whole frequency bandwidth. An electrically compatible R/L/C model can then be synthesized by means of the combination of two conventional algorithms. Some consequences for the instrumentation of a dipole magnet string will be presented. Other areas of application of the proposed methodology will be briefly discussed.