Sanfilippo, S.

Paper	Title	Page
TUPAN090	Parametric Field Modelling for the LHC Main Magnets in Operating Conditions	1586
	M. DiCastro, L. Bottura, L. Deniau, N. J. Sammut, S. Sanfilippo, D. Sernelius, W. Venturini Delsolaro CERN, Geneva
	The first injections and ramps in the LHC will require a prediction of the settings of the main ring powering circuits as well as the main correctors. For this reason we are developing a parametric model of the magnetic field generated by the LHC magnets that will provide the field dependence on current, ramp-rate, time, and history. The model of the field is fitted on magnetic field measurements performed during the acceptance tests in operating conditions before their installation in the machine. In this paper we summarise the different steps necessary to select the relevant data and identify the parameters: the data extraction, the cleaning and the validation of the measurements, and the fitting procedure that is used to obtain the parameters from the experimental results. The main result reported is a summary of the value of the parameters obtained with the above procedure, and describing the behaviour of the magnetic field in the LHC main superconducting magnets (i.e. arc, dispersion suppressors and matching sections).
FROAKI01	Magnet Acceptance and Allocation at the LHC Magnet Evaluation Board	3739
	L. Bottura, P. Bestmann, N. Catalan-Lasheras, S. D. Fartoukh, S. S. Gilardoni, M. Giovannozzi, J. B. Jeanneret, M. Karppinen, A. M. Lombardi, K. H. Mess, D. P. Missiaen, M. Modena, R. Ostojic, Y. Papaphilippou, P. Pugnat, S. Ramberger, S. Sanfilippo, W. Scandale, F. Schmidt, N. Siegel, A. P. Siemko, D. Tommasini, T. Tortschanoff, E. Y. Wildner CERN, Geneva
	The normal- and superconducting magnets for the LHC ring have been carefully examined to insure that each of the more than 1800 assemblies is suitable for the operation in the accelerator. Magnet coordinators, hardware experts and accelerator physicists, joined in the LHC Magnet Evaluation Board, have contributed to this work that consists in the magnet acceptance, and the optimisation achieved by sorting magnets according to their geometry, field quality and quench level. This paper gives a description of the magnet approval mechanism that has been running since four years, reporting in a concise summary on the main results achieved. We take as specific indicators the computed mechanical aperture, the sorting efficiency with respect to systematic and random field errors in the magnets, and the case-by-case analysis necessary to accommodate hardware limitations such as quench limits and training.
	Slides