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Accelerator Physics

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2018-04-21
06:11
Effect of Alignment Errors and Orbit Correctors on the Interaction Region of the FCC-hh / Cruz Alaniz, Emilia (JAI, UK) ; Abelleira, Jose Luis (JAI, UK) ; Seryi, Andrei (JAI, UK) ; van Riesen-Haupt, Léon (JAI, UK)
The Future Circular Collider (FCC) design study aims to develop the design of possible circular colliders in the LHC era. In particular the FCC-hh will aim to produce proton-proton collisions at a center of mass energy of 100 TeV. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-TUPVA039 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA039

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2018-04-21
06:11
Coupling Impedances and Collective Effects for FCC-ee / Belli, Eleonora (U. Rome La Sapienza (main)) ; Castorina, Giovanni (Frascati) ; Migliorati, Mauro (Rome U.) ; Novokhatski, Alexander (SLAC) ; Persichelli, Serena (LBNL, Berkeley) ; Spataro, Bruno (Frascati) ; Zobov, Mikhail (Frascati)
A very important issue for the Future Circular Collider (FCC) is represented by collective effects due to the self-induced electromagnetic fields, which, acting back on the beam, could produce dangerous instabilities. In this paper we will focus our work on the FCC electron-positron machine: in particular we will study some important sources of wake fields, their coupling impedances and the impact on the beam dynamics. [...]
IPAC-2017-THPAB020.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-THPAB020 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.THPAB020

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2018-04-20
16:04
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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2018-04-20
15:54
Report from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders / Maclean, Ewen Hamish (University of Malta (MT)) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Fuchsberger, Kajetan (CERN) ; Giovannozzi, Massimo (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Tomas Garcia, Rogelio (CERN)
Nonlinear errors in experimental insertions can pose a significant challenge to the operability of low-β∗ colliders. [...]
CERN-ACC-NOTE-2018-0034. - 2017. - 10 p.

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2018-04-20
06:05
Progress Toward an Experiment at AWAKE / Muggli, Patric (Munich, Max Planck Inst.) /AWAKE
We briefly report on the progress towards an AWAKE experiment at CERN. First experiments are scheduled for the end of 2016 and will focus on the study of the self-modulation instability. [...]
2017 - 3 p. - Published in : 10.18429/JACoW-NAPAC2016-WEPOA02 Fulltext: PDF;
In : 2016 North American Particle Accelerator Conference, Chicago, IL, USA, 9 - 14 Oct 2016, pp.WEPOA02

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2018-04-20
06:05
AWAKE - A Proton Driven Plasma Wakefield Acceleration Experiment at CERN / Caldwell, Allen (Munich, Max Planck Inst.)
It is the aim of the AWAKE project at CERN to demonstrate the acceleration of electrons in the wake created by a proton beam passing through plasma. The proton beam will be modulated as a result of the transverse two-stream instability into a series ofμbunches that will then drive strong wakefields. [...]
NAPAC-2016-TUA2IO01.- 2017 - 5 p. - Published in : 10.18429/JACoW-NAPAC2016-TUA2IO01 Fulltext: PDF; External link: JACoW
In : 2016 North American Particle Accelerator Conference, Chicago, IL, USA, 9 - 14 Oct 2016, pp.TUA2IO01

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2018-04-18
06:13
The Cherenkov Detector for Proton Flux Measurement (CpFM) in the UA9 Experiment / Montesano, Simone (CERN) ; Addesa, Francesca (INFN, Rome) ; Burmistrov, Leonid (Orsay, LAL) ; Cavoto, Gianluca (INFN, Rome) ; Dubos, Sebastien (Orsay, LAL) ; Iacoangeli, Francesco (INFN, Rome) ; Puill, Véronique (Orsay, LAL) ; Scandale, Walter (CERN ; Orsay, LAL) ; Stocchi, Achille (Orsay, LAL)
The UA9 experiment at the CERN SPS investigates the possibility to use bent crystals to steer particles in high energy accelerators. In this framework the CpFM have been developed to measure the beam particle flux in different experimental situations. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-TUPG40 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.TUPG40

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2018-04-18
06:13
Design and Performance of Coronagraph for Beam Halo Measurements in the LHC / Goldblatt, Aurelie (CERN) ; Bravin, Enrico (CERN) ; Mitsuhashi, Toshiyuki (KEK, Tsukuba) ; Roncarolo, Federico (CERN) ; Trad, Georges (CERN)
The CERN Large Hadron Collider is equipped with two Beam Synchrotron Radiation systems (BSR), one per beam. These systems are used to monitor the transverse distribution of the beam, its longitudinal distribution and the abort gap population. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-MOPG74 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.MOPG74

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2018-04-18
06:13
Adaptive Space Charge Calculations in MADX-SC / Alexahin, Yuri (Fermilab) ; Kapin, Valery (Fermilab) ; Schmidt, Frank (CERN) ; Valishev, Alexander (Fermilab) ; Wasef, Raymond (CERN)
Since a few years MAD-X allows to simulate beam dynamics with frozen space charge à la Basseti-Erskine. The limitation of simulation with a fixed distribution is somewhat overcome by an adaptive approach that consists of updating the emittances once per turn and by recalculating the Twiss parameters after certain intervals, typically every 1,000 turns to avoid an excessive slowdown of the simulations. [...]
NAPAC-2016-THPOA15.- 2017 - 3 p. - Published in : 10.18429/JACoW-NAPAC2016-THPOA15 Fulltext: PDF; External link: JACoW
In : 2016 North American Particle Accelerator Conference, Chicago, IL, USA, 9 - 14 Oct 2016, pp.THPOA15

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2018-04-18
06:13
Simulations in Support of Wire Beam-Beam Compensation Experiment at the LHC / Patapenka, Andrei (NIU, DeKalb ; Fermilab) ; Papaphilippou, Yannis (CERN) ; De Maria, Riccardo (CERN) ; Valishev, Alexander (Fermilab)
The compensation of long-range beam-beam interaction with current wires is considered as a possible technology for the HL-LHC upgrade project. A demonstration experiment is planned in the present LHC machine starting in 2018. [...]
NAPAC-2016-TUPOB17.- 2017 - 3 p. - Published in : 10.18429/JACoW-NAPAC2016-TUPOB17 Fulltext: PDF; External link: JACoW
In : 2016 North American Particle Accelerator Conference, Chicago, IL, USA, 9 - 14 Oct 2016, pp.TUPOB17

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