Data di Pubblicazione:
2016
Citazione:
Quench protection study of the Updated MQXF for the LHC Luminosity Upgrade (HiLumi LHC) / V. Marinozzi, G. Ambrosio, P. Ferracin, S. Izquierdo Bermudez, J. Rysti, T. Salmi, M. Sorbi, E. Todesco. - In: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY. - ISSN 1051-8223. - 26:4(2016 Jun), pp. 7395302.1-7395302.5. ((Intervento presentato al 24. convegno Magnet Technology Conference tenutosi a Kyoto nel 2015 [10.1109/TASC.2016.2523548].
Abstract:
n 2023, the LHC luminosity will be increased, aiming at reaching 3000 fb-1 integrated over ten years. To obtain this target, new Nb3Sn low-β quadrupoles (MQXF) have been designed for the interaction regions. These magnets present a very large aperture (150 mm, to be compared with the 70 mm of the present NbTi quadrupoles) and a very large stored energy density (120 MJ/m3). For these reasons, quench protection is one of the most challenging aspects of the design of these magnets. In fact, protection studies of a previous design showed that the simulated hot spot temperature was very close to the maximum allowed limit of 350 K; this challenge motivated improvements in the current discharge modeling, taking into account the so-called dynamic effects on the apparent magnet inductance. Moreover, quench heaters design has been studied to be going into more details. In this paper, a protection study of the updated MQXF is presented, benefitting from the experience gained by studying the previous design. A study of the voltages between turns in the magnet is also presented during both normal operation and most important failure scenarios.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Niobium compounds; quench protection; superconducting accelerators
Elenco autori:
V. Marinozzi, G. Ambrosio, P. Ferracin, S. Izquierdo Bermudez, J. Rysti, T. Salmi, M. Sorbi, E. Todesco
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