CERN Accelerating science


Latest additions:
PRACTICAL CHALLENGES OF THE LHC MAIN BEAM DUMP UPGRADES / Martin Ruiz, Jose Maria (CERN) ; Kershaw, Keith (CERN) ; Calviani, Marco (CERN) ; Grenier, Damien (CERN) ; Maestre Heredia, Jorge ; Torregrosa Martin, Claudio Leopoldo (Universidad de Oviedo (ES)) ; Buonocore, Luca Rosario (CERN) ; Serrano Galvez, Pablo ; Matheson, Eloise (CERN) ; Sola Merino, Jorge et al.
The two Large Hadron Collider (LHC) beam dumps have to withstand arduous operating conditions and are essential for the safe and reliable operation of the collider. [...]
- 2021. - 8 p.
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Beam Instabilities in Circular Particle Accelerators / Metral, Elias (CERN)
The theory of impedance-induced bunched-beam coherent instabilities is reviewed following Laclare's formalism, adding the effect of an electronic damper in the transverse plane. [...]
- 2021.

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A Method for Aligning the Phases of C10 Cavities in the AD / Albright, Simon (CERN)
The C10 cavities in the AD are used to rotate the injected beam distribution in the longitudinal phase space and then adiabatically debunch it, hence significantly reducing the momentum spread compared injection. [...]
- 2021. - 4 p.
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Electron beam trajectory reconstruction for transfer lines / Ramjiawan, Rebecca Louise (CERN) ; Velotti, Francesco Maria (CERN)
The goal of the AWAKE Run 2a experiment is to study the electron-seeding of the self-modulation of a proton bunch propagating in plasma. [...]
- 2021. - 11 p.
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FIRST PROOF-OF-CONCEPT PROTOTYPE OF AN ADDITIVE-MANUFACTURED RADIO FREQUENCY QUADRUPOLE / Torims, Toms (Riga Technical University (LV)) ; Ratkus, Andris (Riga Technical University (LV)) ; Pikurs, Guntis (Riga Technical University (LV)) ; Gruber, S (Fraunhofer Institute, Dresden, Germany) ; Vretenar, Maurizio (CERN) ; Vedani, Maurizio ; Lopez, Elena (Fraunhofer Insitute, Dresden, Germany) ; Bruckner, F (Fraunhofer Institute. Dresden, Germany and Lulea University, Sweden)
Continuous developments in Additive Manufacturing (AM) technologies are opening opportunities in novel machining, and improving design alternatives for modern particle accelerator components [...]
- 2021. - 12 p.
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Optimising and Extending A Single-Particle Tracking Library For High Parallel Performance / Schwinzerl, Martin (University of Graz (AT)) ; De Maria, Riccardo (CERN) ; Paraschou, Konstantinos (Aristotle University of Thessaloniki (GR)) ; Bartosik, Hannes (CERN) ; Iadarola, Giovanni (CERN) ; Oeftiger, Adrian (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
SixTrackLib is a library for performing tracking simulations on highly parallel systems such as shared memory multi-core processors or graphical processing units (GPUs). [...]
- 2021. - 7 p.
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Evaluation of the closest tune approach and its MAD-X implementation / Hoydalsvik, Eirik Jaccheri (Norwegian University of Science and Technology (NTNU) (NO)) ; Persson, Tobias Hakan Bjorn (CERN) ; Tomas Garcia, Rogelio (CERN)
The closest tune approach (ΔQmin) is a measure of the transverse coupling in an accelerator. [...]
- 2021. - 15 p.
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Design of High-Precision lifting system for the HL-LHC Heavy Components in the interaction region / Micolon, Frederic ; Sosin, Mateusz (CERN)
Given the high radiation level and the tight alignment tolerances, the HL-LHC interaction region components are designed to be realigned remotely using motorized supporting jacks, as human interventions in these zones must be limited to the strict minimum. A position adjustment system will allow a vertical and horizontal displacement of each jack support by at least +/- 2.5 mm with a resolution of less than 10 μm [...]
CERN-ACC-2021-0006.- Geneva : CERN, 2021 - 4 p.
In : 11th International Conference on Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation, Online, Us, Online, 26 - 29 Jul 2021, pp.MEDSI20

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MD2193 – Impedance Measurements of the TCSPM Prototype Collimator / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Arsenyev, Sergey ; Azzopardi, Gabriella (CERN) ; Biancacci, Nicolo (CERN) ; Bruce, Roderik (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Fitterer, Miriam ; Giordano, Francesco (Universita e sezione INFN di Napoli (IT)) ; Lamas Garcia, Inigo et al.
In view of the HL–LHC project, it is planned to exchange 9 out 11 of the LHC secondary collimators in IR7, made of graphite, with low–impedance ones. [...]
- 2021. - 17 p.
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MD2191 – β∗–Reach: 2017 IR7 Collimation Hierarchy Limit and Impedance / Mereghetti, Alessio ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Azzopardi, Gabriella (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Metral, Elias (CERN) ; Redaelli, Stefano (CERN) ; Salvant, Benoit (CERN) ; Valentino, Gianluca (University of Malta (MT)) ; Valuch, Daniel (CERN)
This report summarises the results of MD2191 about the hierarchy limit of the LHC collimation system in IR7 at 6.5 TeV and its impedance. [...]
- 2021. - 19 p.
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