CERN Accelerating science

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Metrology, alignment & fiducialisation / Bestmann, Patrick (speaker) (CERN)
Fiducialisation is an essential part of the alignment process for an accelerator component that need to be aligned within tolerances greater than the component mechanical assembly precision. This step establishes the relationship between the physical object as it has been built and the theoretical slot it should occupy inside the machine. [...]
2023 - 2488. CERN Accelerator School; CAS course on "Normal- and Superconducting Magnets", 19 November - 02 December 2023, St. Pölten, Austria External links: Talk details; Event details In : CAS course on "Normal- and Superconducting Magnets", 19 November - 02 December 2023, St. Pölten, Austria
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Measurement and alignment of the TIDVG5 SPS beam dump / Vendeuvre, Camille (CERN) ; Bestmann, Patrick (CERN) ; Barcet, Florian
During the Long Shutdown 2 (LS2 2018-2021) the CERN injector complex was upgraded to meet the future High Luminosity-Large Hadron Collider (HL-LHC) re- quirements [...]
CERN-BE-2023-016.
- 2022. - 6 p.
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Challenges for Mobile Hydrostatic Levelling Systems applied in accelerator environments / Bestmann, Patrick (CERN) ; Werkland, Aron Strom (Norwegian University of Science and Technology (NTNU) (NO))
The research for automated measurement solutions for the Large Hadron Collider (LHC) is a key point for future developments and of extreme importance for even bigger accelerators like the Future Circular Collider (FCC) where manual measurements are almost excluded due to the very large scale of the future machine. [...]
CERN-BE-2023-005.
- 2022. - 5 p.
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Demonstration of loss reduction using a thin bent crystal to shadow an electrostatic septum during resonant slow extraction / Velotti, Francesco (CERN) ; Addesa, Francesca (INFN, Rome) ; Afonin, Alexander (Serpukhov, IHEP) ; Bestmann, Patrick (CERN) ; Borg, Johan (Imperial Coll., London) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Chesnokov, Yuri (Serpukhov, IHEP) ; Denisov, Alexander (St. Petersburg, INP) ; Di Castro, Mario (CERN) et al.
A proof-of-principle experiment demonstrating the feasibility of using a thin, bent crystal aligned upstream of an extraction septum (ES) to increase the efficiency of the third-integer resonant slow extraction process has been carried out at the CERN Super Proton Synchrotron (SPS). With the primary aim of reducing the beam loss and induced radio-activation of the SPS, the crystal was aligned to both the beam and the septum to reduce by up to 40% the beam intensity impinging the ES and increase the intensity entering the external transfer line. [...]
CERN-ACC-2019-218.- 2019 - 5 p. - Published in : 10.18429/JACoW-IPAC2019-THXXPLM2 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THXXPLM2
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Internal metrology/fiducialisation on other HL-LHC components / Bestmann, Patrick (speaker) (CERN)
2019 - 1533. Reviews; Review of HL-LHC Alignment and Internal Metrology (WP15.4) External links: Talk details; Event details In : Review of HL-LHC Alignment and Internal Metrology (WP15.4)
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SPS quadrupole dog-leg and alignment post LS2 / Velotti, Francesco Maria (CERN) ; Bartosik, Hannes (CERN) ; Bestmann, Patrick (CERN) ; Carlier, Etienne (CERN) ; Cornelis, Karel (CERN) ; Galleazzi, Frederic (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Pasquino, Chiara (CERN)
This document describes the functions of the horizontal and vertical dog-legs in the SPS and the effect of their removal for the injection and dump systems, following the LIU-SPS beam dump upgrade
CERN-ACC-NOTE-2019-0015.
- 2019. - 10 p.
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Improvements to the SPS Slow Extraction for High Intensity Operation / Balhan, Bruno (CERN) ; Bestmann, Patrick (CERN) ; Bjorkman, Daniel (CERN) ; Borburgh, Jan (CERN) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Di Castro, Mario (CERN) ; Donze, Mathieu (CERN) ; Esposito, Luigi Salvatore (CERN) ; Fraser, Matthew Alexander (CERN) et al.
Slow extraction using the third-integer resonance and thin electrostatic septa as used in the SPS to serve the North Area is a process with inherent beam loss. [...]
CERN-ACC-NOTE-2019-0010 ; CERN-PBC-Notes-2021-007.
- 2019. - 87 p.
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Applied metrology in the production of superconducting model magnets for particle accelerators / Ferradas Troitino, Jose (CERN) ; Bestmann, Patrick (CERN) ; Bourcey, Nicolas (CERN) ; Carlon Zurita, Alejandro (CERN) ; Cavanna, Eugenio (ASG Supercond., Genova) ; Ferracin, Paolo (CERN) ; Ferradas Troitino, Salvador (CERN) ; Holik, Eddie Frank (Fermilab) ; Izquierdo Bermudez, Susana (CERN) ; Lackner, Friedrich (CERN) et al.
The production of superconducting magnets for particle accelerators involves high precision assemblies and tight tolerances, in order to achieve the requirements for their appropriate performance. It is therefore essential to have a strict control and traceability over the geometry of each component of the system, and also to be able to compensate possible inherent deviations coming from the production process..
2018 - 1 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4002106 Fulltext: PDF;
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4002106
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Managing the Survey Activities during LS1 / Missiaen, Dominique (CERN) ; Bestmann, Patrick (CERN) ; Fuchs, Jean-Frederic (CERN) ; Gayde, Jean-Christophe (CERN) ; Herty, Andreas (CERN)
The survey and alignment section has realised a huge campaign of measurements and re-alignment of accelerators and detectors components for the LHC and injectors complex. [...]
CERN-ACC-2015-0087.
- 2014. - 7 p.
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Preparing the SPS Complex Alignment for Future LHC Runs / Bestmann, Patrick (CERN) ; Dewitte, Philippe (CERN)
The Super Proton Synchrotron is the last machine in the LHC injector chain. [...]
CERN-ACC-2015-0085.
- 2014. - 7 p.
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