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Prof. Lucio Rossi (CERN)20/01/2005, 09:00Magnet Issues affecting Beam CommissioningThe LHC main magnet production is well beyond half way and today the end by September 2006 is in view. Warm and cold test assures us that the LHC nominal targets are well at hand, while final assessment for the ultimate performance needs a further year of cold testing. The dipoles quench level, which is recovering toward the extremely good performance of the beginning of the...Go to contribution page
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Dr Karl Hubert Mess (CERN AT-MEL)20/01/2005, 09:25Magnet Issues affecting Beam CommissioningoralThe status of the corrector magnets and of the warm and cold magnets in the insertion region is discussed, as well as issues with the injection line magnets. In particular the performance in view of the commissioning is adressed. Other points discussed are spare and repair policies.Go to contribution page
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Elena Wildner (CERN)20/01/2005, 09:50Magnet Issues affecting Beam CommissioningoralWe make a brief overview of activities related to the geometry of the main dipole and the main quadrupole. The blocking of the central support of the dipole has contributed to the stability of the cold mass in the cryostat. Work on the measurements of the spool pieces (magnetic and mechanic) has been carried out. Collection of measurements on the quad axis measurements in data bases...Go to contribution page
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Dr Ezio Todesco (CERN)20/01/2005, 10:35Beam CommissioningoralThe expected field quality of the main magnets of the LHC based on the measurements carried out over a significant fraction of the production is given. Main dipoles, main quadrupoles and insertion quadrupoles are analysed.The more critical parameters and cases of field components out of targets are pointed out, and the implications on the beam optics are outlined.Corrective actions...Go to contribution page
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Mr luca bottura (MTM)20/01/2005, 11:00Magnet Issues affecting Beam CommissioningThe talk gives a summary of data (and their location) as is planned to be collected in warm and cold conditions in the various LHC magnets. This data can and shall be made available for start-up. I will present a view on how the data can be used, in practice, to prepare for injection, forecast ramps of the main magnets and correctors. To achieve this we need information from...Go to contribution page
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Walter Venturini Delsolaro (CERN)20/01/2005, 11:25Magnet Issues affecting Beam CommissioningoralThe contribution will concentrate on the aspects of the magnetic behaviour of correctors which may be relevant for the machine operation. Warm measurements,measured excitation curves at cold, correlation between the warm and cold field measurements and comparisons of the field quality to the targets for LHC will be discussed. The measured magnetic hysteresis and its possible...Go to contribution page
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Mr Davide Tommasini (CERN)20/01/2005, 14:00Magnet Issues affecting Beam CommissioningoralDue to delayed start of magnet installation, about 800 dipoles are being stored outdoor waiting for being transported to the LHC tunnel. To explore in details the possible impact of such a storage on the cryodipole system (magnetic, electric,training, mechanic, geometry, cryogenic, vacuum) a dipole long term stability (DLTS) task force has been organized. After an overview of the...Go to contribution page
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Mr luca bottura (MTM)20/01/2005, 14:30Magnet Issues affecting Beam CommissioningThis talk is the summary of the Magnet Evaluation Board experience in the magnet allocation for the sector 7-8. I will outline the role and functioning of the Board, and its evolution since beginning of 2004. I will then describe the installation algorithm followed, with some reasoning on the background and the expected gain in terms of mechanical aperture, of dynamic aperture, and...Go to contribution page
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