CERN Accelerating science

Accelerator Physics

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2018-05-16
06:13
A conceptual solution for a beam halo collimation system for the Future Circular hadron–hadron Collider (FCC-hh) / Fiascaris, M (CERN) ; Bruce, R (CERN) ; Redaelli, S (CERN)
We present the first conceptual solution for a collimation system for the hadron–hadron option of the Future Circular Collider (FCC-hh). The collimation layout is based on the scaling of the present Large Hadron Collider collimation system to the FCC-hh energy and it includes betatron and momentum cleaning, as well as dump protection collimators and collimators in the experimental insertions for protection of the final focus triplet magnets. [...]
2018 - 11 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 894 (2018) 96-106 Fulltext: PDF;

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2018-05-15
14:18
Design of LEIR Transfer Lines / Carli, Ch ; Chanel, M ; Hemery, J-Y
The LEIR transfer lines are designed to transport the ion beam from the Linac 3 to LEIR and, after accumulation and acceleration from LEIR to the PS. [...]
PIL-LEIR-Note-011 ; CERN-PS-AE-NOTE-2002-218.
- 2002. - 12 p.
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2018-05-03
06:11
What is the best displacement transducer for a seismic sensor? / Novotny, Peter (CERN ; Savoie U. (main)) ; Aimard, Benjamin (Annecy, LAPP) ; Balik, Gael (Annecy, LAPP) ; Brunetti, Laurent (Annecy, LAPP) ; Caron, Bernard (Savoie U. (main)) ; Gaddi, Andrea (CERN)
This paper presents a development of a seismic sensor for the future Compact Linear Collider (CLIC). Sensor in which three different types of sub-nanometre displacement transducers have been integrated: a Fabry-Pérot interferometer, an optical encoder and a capacitive transducer. [...]
2017 - 4 p. - Published in : 10.1109/ISISS.2017.7935672
In : 4th IEEE International Symposium on Inertial Sensors & Systems, Kauai, Hawai, USA, 27 - 30 Mar 2017, pp.121-124

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2018-05-01
07:08
HE-LHC Optics Development / Cai, Yunhai (SLAC) ; Nosochkov, Yuri (SLAC) ; Giovannozzi, Massimo (CERN) ; Risselada, Thys (CERN) ; Todesco, Ezio (CERN) ; Zhou, Demin (KEK, Tsukuba) ; Zimmermann, Frank (CERN)
2017 - 11 p. - Published in : ICFA Beam Dyn. Newsl.: 72 (2017) , pp. 141-151 Fulltext: PDF;

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2018-04-24
06:50
Effect of Proton Bunch Parameter Variation on AWAKE / Savard, Nicolas (U. Victoria (main)) ; Muggli, Patric (Munich, Max Planck Inst.) ; Vieira, Jorge (Lisbon, IST)
In AWAKE, long proton bunches propagate through a plasma, generating wakefields through the self-modulation instability (SMI). The phase velocity of these wakefields changes during the first 4 m of propagation and growth of the SMI, after which it stabilizes at the proton bunch velocity. [...]
2017 - 3 p. - Published in : 10.18429/JACoW-NAPAC2016-WEPOA01 Fulltext: PDF;
In : 2016 North American Particle Accelerator Conference, Chicago, IL, USA, 9 - 14 Oct 2016, pp.WEPOA01

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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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