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Projects, Upgrade and Consolidation Projects

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2021-01-14
10:23
Different approaches for minimising proton beam losses on the 11 T dipole in the IR7 dispersion suppressor / Belli, Eleonora ; Bruce, Roderik (CERN) ; Giovannozzi, Massimo (CERN) ; Mereghetti, Alessio ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN)
The High Luminosity Large Hadron Collider (HL–LHC) project aims at increasing the integrated luminosity by a factor of 10 beyond the LHC design value. [...]
CERN-ACC-NOTE-2021-0002. - 2021.
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2020-12-07
10:16
RESULTS OF THE STRIPPING FOIL MEASUREMENTS LINAC4 WEEK 36 & 48 2020 / Bracco, Chiara (CERN) ; Jorat, Louise Olivia (CERN) ; Noulibos, Remy (CERN) ; Renner, Elisabeth (Vienna University of Technology (AT)) ; Van Trappen, Pieter (CERN) ; Weterings, Wim (CERN)
The 160 MeV H− beam from the Linac4 (L4) linear accelerator at CERN will be injected into the Proton Synchrotron Booster (PSB) with a new H− charge-exchange injection system. [...]
CERN-ACC-NOTE-2020-0063. - 2020. - 4 p.
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2020-11-26
12:42
Dynamic simulations and transient management of the HL-LHC cryogenic system during beam operation / Bradu, Benjamin (CERN)
This paper presents a set of dynamic simulations performed on the future High Luminosity Large Hadron Collider (HL-LHC) cryogenic system. [...]
CERN-ACC-NOTE-2020-0060. - 2020. - 36 p.
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2020-11-24
11:33
Strategy for Landau damping of head-tail instabilities at top energy in the HL-LHC / Buffat, Xavier (CERN) ; Antipov, Sergey ; Arduini, Gianluigi (CERN) ; De Maria, Riccardo (CERN) ; Karastathis, Nikos ; Kostoglou, Sofia (CERN) ; Koval, Adam (University of Dundee (GB)) ; Maclean, Ewen Hamish (CERN) ; Mounet, Nicolas (CERN) ; Papaphilippou, Yannis (CERN) et al.
The main aspects linked to Landau damping of head-tail instabilities at top energy in the HL-LHC are discussed, in particular the interplay between the arc octupoles and long-range, offset or head-on beam-beam interactions as well as lattice imperfections. [...]
CERN-ACC-NOTE-2020-0059. - 2020. - 28 p.
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2020-09-23
12:33
Simulations of particle loss due to hollow e-lens and non-linearities for the HL-LHC / Cai, Rongrong (Imperial College (GB)) ; Mirarchi, Daniele (University of Manchester (GB)) ; Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH))
Simulations on the effects of an electron lens (e-lens) on the halo population depletion have been carried out for the High Luminosity LHC (HL-LHC). [...]
CERN-ACC-NOTE-2020-0046. - 2020. - 19 p.
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2020-09-22
16:58
Orbit Correction Studies on the HL–LHC Layout and Optics V1.5 / Andersson, Joel Daniel (Lund University (SE)) ; De Maria, Riccardo (CERN) ; Gamba, Davide (CERN)
In this report three separate studies on the topic of orbit correction are presented for the HL–LHC V1.5 layout and 15 cm β∗ optics for protons. [...]
CERN-ACC-NOTE-2020-0045. - 2020. - 51 p.
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2020-07-03
16:53
HL-LHC operational scenarios for Pb-Pb and p-Pb operation / Bruce, Roderik (CERN) ; Argyropoulos, Theodoros (CERN) ; Bartosik, Hannes (CERN) ; De Maria, Riccardo (CERN) ; Fuster Martinez, Nuria (CERN) ; Jebramcik, Marc Andre (Goethe University Frankfurt (DE)) ; Jowett, John (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Mounet, Nicolas (CERN) ; Redaelli, Stefano (CERN) ; Rumolo, Giovanni (CERN) et al.
This report describes the running scenario for operation with Pb-Pb and p-Pb collisions in the HL-LHC. [...]
CERN-ACC-2020-0011. - 2020. - 46 p.
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2020-05-18
12:47
RF multipoles deliverable / Cruz Alaniz, Emilia (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
The crab cavities to be installed in the High-Luminosity LHC (HL-LHC) aim to provide an increase in luminosity by restoring head-on collisions and therefore reducing the loss of luminosity due to the crossing angle. [...]
CERN-ACC-NOTE-2020-0031. - 2020. - 17 p.
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2020-04-22
06:57
New local optics measurements and correction techniques for the LHC and its luminosity upgrade / Coello de Portugal, J (CERN) ; Tomás, R (CERN) ; Hofer, M (CERN)
As the beams at the interaction points (IPs) of circular colliders are pushed toward smaller sizes, the correction of the magnetic field errors in high-β regions become increasingly important, but also challenging. This paper presents an algorithm developed to compute automatically local corrections. [...]
2020 - 13 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 041001 Fulltext from Publisher: PDF;

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2020-04-21
17:35
Beam-beam simulations for optimizing the performance of the High-luminosity Large Hadron Collider Proton Physics / Karastathis, Nikolaos (CERN) ; Papaphilippou, Yannis (CERN)
The High Luminosity LHC will have the challenge to operate in a high brightness regime. [...]
CERN-ACC-NOTE-2020-0026. - 2020. - 48 p.
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