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LHC Triplet Task Force Report / Arduini, Gianluigi (CERN) ; Bradu, Benjamin (CERN) ; Brodzinski, Krzysztof (CERN) ; Bruce, Roderik (CERN) ; Cerutti, Francesco (CERN) ; Ciccotelli, Alessia (University of Manchester (GB)) ; Deferne, Guy (CERN) ; Fartoukh, Stephane (CERN) ; Fessia, Paolo (CERN) ; Garion, Cedric (CERN) et al.
The excellent performance of the Large Hadron Collider (LHC) and the extension of Run 3 by one year have led to a significant increase of the expected integrated luminosity by the end of its operation and before the start of the High Luminosity LHC (HL-LHC), exceeding the design LHC integrated luminosity of 300 fb−1 for which the final focus region has been designed. [...]
- 2023. - 95 p.
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MOSFET Selection for a 18ka modular power converter for HL-LHC inner triplet / Wassinger, Nicolas ; Maestri, Sebastian (National Scientific and Technical Research Council (AR)) ; Garcia Retegui, Rogelio (ICYTE, COCINET-UNMDP, Mar del Plata, Argentina) ; Funes, Miguel (ICYTE, COCINET-UNMDP, Mar del Plata, Argentina) ; Antoszczuk, Pablo Daniel (CERN) ; Pittet, Serge (CERN)
The upgrade of the Large Hadron Collider (LHC) at CERN towards the High Luminosity-LHC (HL-LHC) presents different challenges, among them, the upgrade of the power converters associated to the inner triplet magnets to reach the required rated current of 18kA. In order to reach this current and to accomplish the stringent requirements associated to this kind of application, even under a fault scenario, redundancy and modularity are foreseen in the converter design. [...]
CERN-ACC-2023-0003.- Geneva : CERN, 2023 - 13 p. - Published in : Power Electronic Devices and Components (PEDC) 6 (2023) NONE

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Assessing the Usefulness of Assurance Cases: an Experience with the CERN Large Hadron Collider / Rees, Chris (Critical Systems Labs) ; Delgado, Mateo (Critical Systems Labs) ; Lippelt, Rolf (Critical Systems Labs) ; Joyce, Jeff (Critical Systems Labs) ; Diemert, Simon (Critical Systems Labs) ; Menghi, Claudio (McMasters University) ; Viger, Torin (University of Toronto) ; Chechik, Marsha (University of Toronto) ; Uythoven, Jan (CERN) ; Zerlauth, Markus (CERN) et al.
Assurance cases are structured arguments designed to show that a system functions properly in its operational environment. [...]
- 2023.
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High Energy LHC Machine Options in the LHC Tunnel / Bottura, Luca (CERN) ; Zimmermann, Frank (CERN)
The LHC infrastructure, i.e. [...]
- 2023. - 20 p.
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The Effect of Ground Motion on the LHC and HL-LHC Beam Orbit / Schaumann, Michaela ; Gamba, Davide (CERN) ; Garcia Morales, Hector ; Corsini, Roberto (CERN) ; Guinchard, Michael (CERN) ; Scislo, Lukasz Grzegorz (Tadeusz Kosciuszko Cracow University of technology (PL)) ; Wenninger, Jorg (CERN)
The High Luminosity Large Hadron Collider (HL--LHC) will require unprecedented orbit stability at the low-beta experiments, ATLAS and CMS. [...]
- 2023. - 13 p.
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Wakefield damping in a distributed coupling LINAC / Ericson, Evan James ; Grudiev, Alexej (CERN) ; Bertwistle, Drew Allan (University of Saskatchewan (CA)) ; Boland, Mark James (University of Saskatchewan (CA))
The number of cells in a π-mode standing wave (SW) accelerating structure for the Compact linear Collider (CLIC) project is limited by mode overlap with nearby modes [...]
CERN-ACC-2022-0013 ; CLIC-Note-1179.
- 2022. - 7 p.
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Industrilization study for 12 GHz Accelerating Structures for CLIC 380 / Magazinik, Anastasiya (Tampere University of Technology (FI)) ; Catalan Lasheras, Nuria (CERN) ; Sauza Bedolla, Joel
The Compact Linear Collider (CLIC) is a multi-TeV electron-positron machine under development by the CLIC accelerator collaboration for few decades. [...]
CERN-ACC-2021-0016 ; CLIC-Note-1178.
- 2021. - 34 p.
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Low-Frequency Analytical Model of Superconducting Magnet Impedance / Martino, Michele (CERN)
A superconducting magnet for particle accelerators is often modeled as an ideal inductor, as it indeed exhibits a completely negligible resistance; this is fully satisfactory, as an example, for control purposes, as the time constant formed by the magnet inductance and the resistance of normal conducting cables connecting it to the power converter accurately describe the essentially dominant dynamics of the circuit. Such a model would however fail to correctly represent the noise attenuation mechanism at play in practical superconducting magnets, which also include a vacuum pipe or a beam screen in the inner part of the aperture, an iron yoke on the outer part, and, potentially, a stainless steel or aluminum collar in between. [...]
CERN-ACC-2022-0011.- Geneva : CERN, 2022 - 13 p. - Published in : Model. Simul. Eng. 2022 (2022) 2105847 Fulltext: PDF;

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Prospects for beam-based study of dodecapole nonlinearities in the CERN High-Luminosity Large Hadron Collider / Maclean, Ewen Hamish (CERN) ; Carlier, Felix Simon (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Giovannozzi, Massimo (CERN) ; Tomas Garcia, Rogelio (CERN)
Nonlinear magnetic errors in low-β insertions can have a significant impact on the beam-dynamics of a collider such as the CERN Large Hadron Collider (LHC) and its luminosity upgrade (HL-LHC). Indeed, correction of sextupole and octupole magnetic errors in LHC experimental insertions has yielded clear operational benefits in recent years. [...]
CERN-ACC-NOTE-2022-0020.- Geneva : CERN, 2022 - 34 p. - Published in : Eur. Phys. J. 137 (2022) 1249 Fulltext: PDF;

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Design of a new SPS injection system via numerical optimisation / Waagaard, Elias Walter (Uppsala University (SE)) ; Barnes, Mike (CERN) ; Bartmann, Wolfgang (CERN) ; Borburgh, Jan (CERN) ; Ducimetiere, Laurent Sylvain (CERN) ; Kramer, Thomas (CERN) ; Stadlbauer, Tobias (CERN) ; Trubacova, Pavlina (CERN) ; Velotti, Francesco Maria (CERN)
The Super Proton Synchrotron (SPS) injection system plays a fundamental role to preserve the quality of injected high-brightness beams for the Large Hadron Collider (LHC) physics program and to maintain the maximum storable intensity. [...]
CERN-ACC-NOTE-2022-0019 ; arXiv:2206.11571.
- 2022. - 4 p.
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