CERN Accelerating science

Projects, Upgrade and Consolidation Projects

Darreres entrades:
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. [...]
- 2020. - 28 p.
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Status of the ESSnuSB Extraction Design / Alekou, Androula (CERN & Uppsala University) ; Bartosik, Hannes (CERN) ; Efthymiopoulos, Ilias (CERN)
In the European Spallation Source (ESS) neutrino Super Beam (ESSnuSB), a very intense neutrino beam will be produced in order to measure with a high precision the CP violating angle at the 2nd oscillation maximum. [...]
- 2020. - 7 p.
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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). [...]
- 2020. - 19 p.
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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. [...]
- 2020. - 51 p.
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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. [...]
- 2020. - 46 p.
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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. [...]
- 2020. - 17 p.
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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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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. [...]
- 2020. - 48 p.
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Resistivity Characterization of Molybdenum-Coated Graphite-Based Substrates for High-Luminosity LHC Collimators / Accettura, Carlotta (Politecnico di Milano (IT)) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Baris, Adrienn (CERN) ; Bertarelli, Alessandro (CERN) ; Biancacci, Nicolo (CERN) ; Calatroni, Sergio (CERN) ; Carra, Federico (CERN) ; Caspers, Fritz (European Scientific Institute (FR)) ; Garcia-Tabares Valdivieso, Elisa (CERN) et al.
The High-Luminosity Large Hadron Collider (HL-LHC) project aims at extending the operability of the LHC by another decade and increasing by more than a factor of ten the integrated luminosity that the LHC will have collected by the end of Run 3. This will require doubling the beam intensity and reducing the transverse beam size compared to those of the LHC design. [...]
CERN-ACC-NOTE-2020-0025.- Geneva : CERN, 2020 - Published in : Coatings 10 (2020) 361 Fulltext: PDF;

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Beam-based measurements of the skew-sextupolar component of the radio frequency field of a HL-LHC-type crab-cavity / Carla', Michele (CERN) ; Alekou, Androula (University of Manchester (GB)) ; Bartosik, Hannes (CERN) ; Carver, Lee Robert (University of Liverpool (GB))
Two High Luminosity Large Hadron Collider (LHC) crab-cavity types have been installed in 2018 in the CERN SPS for testing purposes. [...]
- 2020. - 26 p.
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