Testing beam-induced quench levels of LHC superconducting magnets
| Autor: | P. P. Granieri, M. Bednarek, J. Wenninger, Nikhil Vittal Shetty, F. Cerutti, Stefano Redaelli, Eva Barbara Holzer, Jens Steckert, E. Skordis, Markus Zerlauth, R. Schmidt, Agnieszka Priebe, Wolfgang Höfle, E Nebot Del Busto, Vera Chetvertkova, Roderik Bruce, Daniel Wollmann, Bernd Dehning, G Bellodi, Chiara Bracco, Daniel Valuch, T. Baer, Mariusz Sapinski, Belen Salvachua, Arjan Verweij, Matteo Solfaroli, A. Lechner, Bernhard Auchmann |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Accelerator Physics (physics.acc-ph) Nuclear and High Energy Physics Large Hadron Collider Physics and Astronomy (miscellaneous) Proton FOS: Physical sciences Surfaces and Interfaces Superconducting magnet Accelerators and Storage Rings law.invention Nuclear physics Electromagnetic coil law Magnet lcsh:QC770-798 Physics::Accelerator Physics Physics - Accelerator Physics lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Beam dump Collider Beam (structure) |
| Zdroj: | Physical Review Special Topics. Accelerators and Beams, Vol 18, Iss 6, p 061002 (2015) |
| Popis: | In the years 2009-2013 the Large Hadron Collider (LHC) has been operated with the top beam energies of 3.5 TeV and 4 TeV per proton (from 2012) instead of the nominal 7 TeV. The currents in the superconducting magnets were reduced accordingly. To date only seventeen beam-induced quenches have occurred; eight of them during specially designed quench tests, the others during injection. There has not been a single beam- induced quench during normal collider operation with stored beam. The conditions, however, are expected to become much more challenging after the long LHC shutdown. The magnets will be operating at near nominal currents, and in the presence of high energy and high intensity beams with a stored energy of up to 362 MJ per beam. In this paper we summarize our efforts to understand the quench levels of LHC superconducting magnets. We describe beam-loss events and dedicated experiments with beam, as well as the simulation methods used to reproduce the observable signals. The simulated energy deposition in the coils is compared to the quench levels predicted by electro-thermal models, thus allowing to validate and improve the models which are used to set beam-dump thresholds on beam-loss monitors for Run 2. Comment: 19 pages |
| Databáze: | OpenAIRE |
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