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Measurement of Beta-Beating Due to Strong Head-on Beam-Beam Interactions in the LHC
/ Gonçalves Jorge, Patrik (Ecole Polytechnique, Lausanne) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Carlier, Felix (CERN) ; Coello de Portugal, Jaime Maria (CERN) ; Fol, Elena (CERN) ; Medina Medrano, Luis (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Tomás, Rogelio (CERN) ; Wegscheider, Andreas (CERN)
The LHC operation relies on a good knowledge of the optics, usually corrected in absence of beam-beam interactions. In a near future, both the LHC and the HL-LHC will need to cope with large head-on beam-beam parameters, the impact on the optics needs to be understood and, if necessary, corrected. [...]
CERN-ACC-2017-151.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPVA030
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA030
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Dynamic beta and beta-beating effects in the presence of the beam-beam interactions
/ Pieloni, Tatiana (CERN) ; Barranco, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Concalves Jorge, Patrik (Ecole Polytechnique, Lausanne) ; Medina Medrano, Luis (CERN) ; Tambasco, Claudia (CERN) ; Tomás, Rogelio (CERN)
The Large Hadron Collider (LHC) has achieved correction of beta beat down to better than 5%. The beam-beam interactions at the four experiments result as extra quadrupole error in the lattice. [...]
2016 - 4 p.
- Published in : 10.18429/JACoW-HB2016-MOPR027
Fulltext: PDF;
In : 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Malmö, Sweden, 3 - 8 Jul 2016, pp.MOPR027
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3.
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Landau Damping Studies for the FCC: Octupole Magnets, Electron Lens and Beam-Beam Effects
/ Tambasco, Claudia (Ecole Polytechnique, Lausanne) ; Arsenyev, Sergey (CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Rivkin, Leonid (Ecole Polytechnique, Lausanne) ; Schulte, Daniel (CERN)
Stability studies for the FCC-hh operational cycle are explored using Landau octupoles and electron lenses alone and in the presence of long-range as well as head-on beam-beam effects. Pros and cons of the various methods are compared and an optimum operational scenario to guarantee the maximum stability is proposed..
CERN-ACC-2018-153.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAF074
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF074
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Assessment of Linear and Non-Linear Optics Errors due to Beam-Beam with Multipoles for the High Luminosity LHC
/ Medina Medrano, Luis (Guanajuato U. ; CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Tomás, Rogelio (CERN)
Study of the head-on and long-range beam-beam effects in the High Luminosity LHC (HL-LHC) is of interest to evaluate their potential impact on performance (in the form of luminosity imbalance) and machine operation (collimator system), and, depending on their magnitude, correction schemes might be necessary to minimize them. In this work, both the β-beating at zero amplitude and its amplitude-dependence are computed for the current HL-LHC baseline optics and parameters, as well as the amplitude detuning, at the main interaction points and collimators. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAK135
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK135
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Correction of Beta-Beating Due to Beam-Beam for the LHC and Its Impact on Dynamic Aperture
/ Medina Medrano, Luis (CERN ; Unlisted, MX) ; Barranco García, Javier (CERN ; Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Papaphilippou, Yannis (CERN) ; Pieloni, Tatiana (CERN ; Ecole Polytechnique, Lausanne) ; Tomás, Rogelio (CERN)
Minimization of the beta-beating at the two main interaction points of the LHC arising from the head-on and long-range beam-beam interactions can be performed by adjusting the strength of quadrupole or sextupole correctors. This compensation scheme is applied to the current LHC optics where the results show a significant reduction of the peak and RMS beta-beating; and the impact on the dynamic aperture is computed. [...]
CERN-ACC-2017-161.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-WEOAB2
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEOAB2
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The High Energy LHC Beam-Beam Effects studies
/ Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Amorim, David (CERN) ; Antipov, Sergey (CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Rivkin, Leonid (Ecole Polytechnique, Lausanne) ; Salvant, Benoit (CERN) ; Tambasco, Claudia (Ecole Polytechnique, Lausanne) ; Zimmermann, Frank (CERN)
We present in this paper the studies of beam-beam effects for the High Energy Large Hadron Collider. We will describe and review the different aspects of beam-beam interactions (i.e. [...]
CERN-ACC-2018-074.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF069
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF069
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Fulltext
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Dynamic Aperture Studies of the Long-Range Beam-Beam Interaction at the LHC
/ Crouch, Matthew (U. Manchester (main)) ; Appleby, Robert (U. Manchester (main)) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Giovannozzi, Massimo (CERN) ; Maclean, Ewen (CERN) ; Muratori, Bruno (Daresbury) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Tambasco, Claudia (Ecole Polytechnique, Lausanne)
Long-range beam-beam interactions dictate the choice of operational parameters for the LHC, such as the crossing angle and β^{*} and therefore the luminosity reach for the collider. These effects can lead to particle losses, closed orbit effects and emittance growth. [...]
CERN-ACC-2017-182.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-THPAB056
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.THPAB056
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9.
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Simulation of Head-on Beam-Beam Limitations in Future High Energy Colliders
/ Buffat, Xavier (CERN) ; Barranco, Javier (EPFL-ISIC, Lausanne) ; Florio, Adrien (EPFL-ISIC, Lausanne) ; Pieloni, Tatiana (CERN) ; Tambasco, Claudia (CERN)
The Future Circular Hadron Collider (FCC-hh) project calls for studies in a new regime of beam-beam interactions. While the emittance damping due to synchrotron radiation is still slower than in past or existing lepton colliders, it is significantly larger than in other hadron colliders. [...]
CERN-ACC-2016-261.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-TUPMW009
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.TUPMW009
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Towards Beam-Beam Simulations for FCC-ee
/ Kicsiny, Peter (CERN ; Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Iadarola, Giovanni (CERN) ; Pieloni, Tatiana (EPFL-ISIC, Lausanne) ; Schulte, Daniel (CERN) ; Seidel, Mike (Ecole Polytechnique, Lausanne ; PSI, Villigen)
The FCC-ee (Future Circular Collider) lepton collider is currently the most favored next generation research infrastructure project at CERN, aimed at studying properties of standard model particles with the highest precision ever. The chosen parameters of the machine yield unprecedented conditions which give rise to previously unseen dynamical effects during collisions. [...]
2023 - 6 p.
- Published in : JACoW eeFACT 2022 (2023) 165-170
Fulltext: PDF;
In : 65th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+ e- Colliders (eeFACT2022), INFN, Frascati, Italy, 12 - 16 Sep 2022, pp.165-170
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