Title |
Multiparametric Response of the HL-LHC Dynamic Aperture in Presence of Beam-Beam Effects |
Authors |
- D. Pellegrini, S.D. Fartoukhpresenter, N. Karastathis, Y. Papaphilippou
CERN, Geneva, Switzerland
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Abstract |
We performed extended simulations of HL-LHC dynamic aperture in the presence of beam-beam effects in the weak- strong approximation, evaluating the contributions of param- eters such as: bunch intensity, crossing angle, chromaticity, current in the Landau octupoles and multipole errors. From the beam dynamics point of view, the main differ- ence between the LHC (until 2017) and the HL-LHC is the deployment of the achromatic telescopic squeezing (ATS) optics, allowing not only for a smaller '' reach, but also modifying the phase advances between the lattice correctors (sextupoles, octupoles) and the main IPs, and increasing the peak ' functions in the arcs. These correctors become therefore more efficient for the chromatic correction, but also a mitigation of the beam-beam long range interactions using the Landau octupoles is enabled, resulting in a possible reduction of the normalised crossing angle. The limits have been investigated in a tracking simulation campaign aimed at exploring the operational space for the HL-LHC and two possible options for luminosity levelling.
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Paper |
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Conference |
IPAC2017, Copenhagen, Denmark |
Series |
International Particle Accelerator Conference (8th) |
Proceedings |
Link to full IPAC2017 Proccedings |
Session |
Posters Tuesday 3 |
Date |
16-May-17 16:00–18:00 |
Main Classification |
01 Circular and Linear Colliders |
Sub Classification |
A01 Hadron Colliders |
Keywords |
luminosity, octupole, simulation, beam-beam-effects, emittance |
Publisher |
JACoW, Geneva, Switzerland |
Editors |
Volker RW Schaa (GSI, Darmstadt, Germany); Gianluigi Arduini (CERN, Geneva, Switzerland); Juliana Pranke (ESS, Lund, Sweden); Mike Seidel (PSI, Villigen, Switzerland); Mats Lindroos (ESS, Lund, Sweden) |
ISBN |
978-3-95450-182-3 |
Published |
May 2017 |
Copyright |
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