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Persistent URL http://purl.org/net/epubs/work/26215340
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Record Id 26215340
Title Optics transition between injection and collision optics for the HL-LHC upgrade project
Abstract Plans for the luminosity upgrade of the LHC collider at CERN (HL-LHC) are based on implementation of magnets with larger apertures in the interaction regions, together with the ATS technique to reach very low values of the beta function at the collision points. The transition from injection to collision optics will be carried out in two stages, and will involve varying the strengths of the quadrupoles within the straight sections. Solutions for the optics transition have to meet a variety of challenging constraints, including constraints on the phase advances and Twiss parameters throughout the straights involved in the transition, specified minimum and maximum strengths of the quadrupoles, etc. Moreover, to minimize the time taken for the transition, the variation of the quadrupole strengths should be as smooth as possible, especially for the strongest quadrupoles. Avoiding changes of slope as much as possible will also minimize hysteresis effects in the super-conducting matching quadrupoles participating to the process. This paper presents one possible solution for the optics transition, calculated for the HLLHCv1.0 version of the optics and layout of the HL-LHC.
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Language English (EN)
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Paper In Conference Proceedings In 4th International Particle Accelerator Conference (IPAC'13), Shanghai, China, 12-17 May 2013, (2013): 1460-1462. http://accelconf.…/papers/tupfi051.pdf 2013