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Accelerators & Technology Sector Notes

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2025-07-29
09:13
SPS-Scraper Longitudinal Impedance Simulation and Measurement Report / Bursali, Hikmet (CERN) ; De La Fuente Garcia, Elena (Universidad Politecnica de Madrid (ES)) ; Salvant, Benoit (CERN) ; Vollinger, Christine (CERN)
This report presents the longitudinal impedance mitigation study of the 4th version of SPS Transverse Beam Scraper [...]
CERN-ACC-NOTE-2025-0015. - 2025
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2025-07-24
15:39
LGC open-source: A strategy to share adjustment software and algorithmic development / Kautzmann, Guillaume (CERN) ; Gutekunst, Juergen (CERN) ; Klumb, Francis (CERN) ; Elson, Philip (CERN)
LGC (Logiciel Général de Compensation) is a software that computes position estimates and associated statistics based on observations obtained by CERN surveyors. [...]
CERN-ACC-NOTE-2024-0038. - 2024 - 6.
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2025-07-24
15:34
Alignment strategy for the High-Luminosity Large Hadron Collider / Mainaud Durand, Helene (CERN) ; Barbarroux, Vincent Thomas (CERN) ; Behrens, Antje (CERN) ; Bestmann, Patrick (CERN) ; Fuchs, Jean-Frederic (CERN) ; Gayde, Jean-Christophe (CERN) ; Kautzmann, Guillaume (CERN) ; Klumb, Francis (CERN) ; Mergelkuhl, Dirk (CERN) ; Naegely, Anne-Valerie (CERN) et al.
The High Luminosity Large Hadron Collider (HL-LHC) project is an upgrade of the LHC to enable continuous operation at luminosities which are a factor of five above the LHC design value. [...]
CERN-ACC-NOTE-2024-0037. - 2024 - 6.
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2025-07-24
15:29
Development of a new levelling process integrated into a 3D global calculation / Fuchs, Jean-Frederic (CERN) ; Segers, Jean-Francois ; Vendeuvre, Camille (CERN)
CERN surveyors have traditionally used the 2D + 1 method for beamline smoothing, where computing the planimetric (XY) and altimetric (H) data performed independently and separately. [...]
CERN-ACC-NOTE-2024-0036. - 2024 - 7.
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2025-07-24
15:18
Alignment system tests on the CERN remote alignment system mock-up / Sosin, Mateusz (CERN) ; Barbarroux, Vincent Thomas (CERN) ; Biedrawa, Piotr ; Calmels, Julia Anna Jeanne ; Dandekar, Mamta Shrikrishna ; Falcao Machado, Joao Luis ; Fernandez Bautista, Roberto (CERN) ; Herty, Andreas (CERN) ; Kampp, Jonas ; Jasonek, Wojciech (AGH University of Krakow (PL)) et al.
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) aims to enable continuous operation at luminosities which are a factor of five above the LHC design value. [...]
CERN-ACC-NOTE-2024-0035. - 2024 - 8.
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2025-07-24
15:10
A next generation survey train for future accelerators / Bestmann, Patrick (CERN) ; Barcet, Florian ; Mergelkuhl, Dirk (CERN)
The increasing dimensions and constraints for next- generation accelerators are driving the development of new methods and strategies for automated alignment measurements [...]
CERN-ACC-NOTE-2024-0034. - 2024 - 5.
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2025-07-24
15:06
Internal monitoring of the HL-LHC components / Rude, Vivien (CERN) ; Mainaud Durand, Helene (CERN) ; Barbarroux, Vincent Thomas (CERN) ; Bestmann, Patrick (CERN) ; Calmels, Julia Anna Jeanne ; Petrone, Carlo (CERN) ; Noir, Michel (CERN) ; Pentella, Mariano (CERN) ; Sarvade, Praneeth ; Sosin, Mateusz (CERN)
The High-Luminosity Large Hadron Collider (HL-LHC) project at CERN aims to enhance the LHC’s performance and expand its potential for discoveries beyond 2029 [...]
CERN-ACC-NOTE-2024-0033. - 2024 - 7.
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2025-07-24
14:43
Layer beams and their prospect for long-range alignment / Dusek, Martin (Technical University of Liberec (CZ)) ; Figura, Sebastian Antoni (Akademia Gorniczo Hutnicza (PL)) ; Gayde, Jean-Christophe (CERN) ; Sulc, Miroslav (Technical University of Liberec (CZ))
As part of the study on using structured laser light for alignment, an innovative technique is proposed for generating symmetrical pseudo-non-diffracting layers of caustic optical beams, known as Layer Beams (LB). [...]
CERN-ACC-NOTE-2024-0032. - 2024 - 5.
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2025-07-24
14:35
Status of geodetic studies and alignment perspectives for the CERN future circular collider / Weyer, Benjamin (CERN) ; Watrelot, Leonard ; Niewiem, Witold Grzegorz (ETH Zurich (CH))
The ongoing feasibility study for the Future Circular Collider (FCC-ee), which is planned to be built at CERN, raises survey and geodetic challenges. [...]
CERN-ACC-NOTE-2024-0031. - 2024 - 7.
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2025-05-20
11:13
Safety Aspects of the Technical Galleries Consolidation Program / Krautsztrung, Iga Maria (CERN) ; Evrard, Sebastien (CERN) ; Prouteau, Olivier Bernard (CERN)
The ongoing Technical Galleries Consolidation Project aims to address existing issues and refurbish the conditions of the galleries and their related infrastructure to the extent reasonably possible. [...]
CERN-ACC-NOTE-2024-0030. - 2024 - 3.
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