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CERN Document Server 33 records found  1 - 10nextend  jump to record: Search took 0.73 seconds. 
1.
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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2.
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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3.
High-Energy LHC Design / Zimmermann, Frank (CERN) ; Abelleira, Jose Luis (JAI, UK) ; Amorim, David (CERN) ; Antipov, Sergey (CERN) ; Apyan, Armen (Yerevan Phys. Inst.) ; Arsenyev, Sergey (CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Benedikt, Michael (CERN) ; Bruce, Roderik (CERN) ; Burkart, Florian (DESY) et al.
In the frame of the FCC study we are designing a 27 TeV hadron collider in the LHC tunnel, called the High Energy LHC (HE-LHC)..
CERN-ACC-2018-150.- 2018 - 8 p. - Published in : (2018) , pp. MOPMF064
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 022009 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF064
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4.
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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5.
Status of the studies on collective effects involving beam-beam interactions at the HL-LHC / Buffat, Xavier (CERN) ; Barraud, Laurent (Universite Pierre et Marie Curie et Universite Denis Diderot (FR)) ; Metral, Elias (CERN) ; Ribes Metidieri, Ariadna (University of Barcelona (ES)) ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Goncalves Jorge, Patrik ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH))
This note summarised the status of the studies on the coherent beam-beam effects in the HL-LHC project. [...]
CERN-ACC-NOTE-2018-0036. - 2018. - 24 p.
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6.
MD 2197: Experimental studies of Landau damping by means of Beam Transfer Function measurements in the presence of beam-beam interactions and diffusive mechanisms / Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Barros Marin, Manoel (CERN) ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Boccardi, Andrea (CERN) ; Buffat, Xavier (CERN) ; Bruce, Roderik (CERN) ; Gasior, Marek (CERN) ; Hostettler, Michi (Universitaet Bern (CH)) ; Lefevre, Thibaut (CERN) ; Louro Alves, Diogo Miguel (CERN) et al.
Beam Transfer Function (BTF) measurements are direct measurement of the stability diagrams that define the stability threshold of coherent beam instabilities driven by the impedance. [...]
CERN-ACC-NOTE-2018-0017. - 2018. - 8 p.
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7.
MD 2722: Investigation of Landau damping by means of BTF measurements / Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Barros Marin, Manoel (CERN) ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Boccardi, Andrea (CERN) ; Buffat, Xavier (CERN) ; Bruce, Roderik (CERN) ; Gasior, Marek (CERN) ; Hostettler, Michi (Universitaet Bern (CH)) ; Lefevre, Thibaut (CERN) ; Levens, Tom (CERN) et al.
Stability diagrams quantify the LHC stability thresholds due to the beam coupling impedance. [...]
CERN-ACC-NOTE-2018-0016. - 2018. - 9 p.
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8.
Impact of the ADT on the beam quality with high brightness beams in collision (MD2155) / Buffat, Xavier (CERN) ; Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Kostoglou, Sofia (National Technical Univ. of Athens (GR)) ; Salvachua Ferrando, Belen Maria (CERN) ; Papadopoulou, Parthena Stefania (CERN) ; Ponce, Laurette (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Suykerbuyk, Ronaldus (CERN) ; Valuch, Daniel (CERN) ; Walsh, David John (CERN) et al.
The results of an experiment aiming at determining indirectly the noise level in the LHC, isolating the contribution of the transverse damper, through their impact on the emittance of colliding high brightness bunches at 6.5 TeV in the LHC are presented..
CERN-ACC-NOTE-2018-0005. - 2018. - 12 p.
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9.
Update of the HL-LHC operational scenarios for proton operation / Metral, Elias (CERN) ; Antipov, Sergey (CERN) ; Antoniou, Fanouria (CERN) ; Appleby, Robert Barrie (University of Manchester (GB)) ; Arduini, Gianluigi (CERN) ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Baudrenghien, Philippe (CERN) ; Biancacci, Nicolo (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) et al.
The main aim of this document is to have a clearly identified set of beam and machine parameters to be used for numerical simulations and performance assessment [...]
CERN-ACC-NOTE-2018-0002. - 2018. - 42 p.
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10.
MD 979: Beta-beating measurements on colliding beams / Goncalves Jorge, Patrik ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fol, Elena (University of Applied Sciences (DE)) ; Langner, Andy Sven (CERN) ; Medina Medrano, Luis Eduardo (Universidad de Guanajuato (MX)) ; Olexa, Jakub (CERN) et al.
The HL-LHC high brightness beams will give a large β-beating due to the head-on and long-range interactions since a beam-beam parameter of 0.01 per Interaction Point (IP) is expected. [...]
CERN-ACC-NOTE-2017-0060. - 2017. - 13 p.
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