THE (7,7) OPTICS AT CERN PS

Authors

  • M. Serluca et al.

DOI:

https://doi.org/10.23727/CERN-Proceedings-2017-002.43

Abstract

The PS lattice is composed by one hundred combined function magnets, which set the bare tune of the machine to (Qh, Qv) = (6.25, 6.28). Low energy quadrupoles are used at injection to move the tune in a limited working point area. In particular the vertical tune is moved below 6.25 to avoid the structural resonance 8 Qv = 50 coupled with space charge, which leads to strong losses. In view of the high demands in terms of beam brightness for LIU and HL-LHC projects, the interest of exploring different integer tune working area started during last years. During 2016, for the first time, it has been possible to explore the (7,7) tune working area at injection using the auxiliary circuits of the combined function magnets. A finite-element magnetic model, under development, has been used to predict the required currents in order to get the desired optical parameters. In this paper we present the results and issues encountered during the Machine Development (MD) studies about the injection in the (7,7) area along with optics and beam parameters measurements.

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Published

2017-12-12

Issue

Vol. 2 (2017): Proceedings of the Injector MD Days 2017

Section

Articles

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